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Auswahl der wissenschaftlichen Literatur zum Thema „Tea germplasm“
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Zeitschriftenartikel zum Thema "Tea germplasm"
1
Liu, Caiguo, Wentao Yu, Chunping Cai, Shijian Huang, Huanghua Wu, Zehan Wang, Pan Wang, Yucheng Zheng, Pengjie Wang und Naixing Ye. „Genetic Diversity of Tea Plant (Camellia sinensis (L.) Kuntze) Germplasm Resources in Wuyi Mountain of China Based on Single Nucleotide Polymorphism (SNP) Markers“. Horticulturae 8, Nr. 10 (10.10.2022): 932. http://dx.doi.org/10.3390/horticulturae8100932.
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Wuyi Mountain in Southeast China is the origin of black tea and oolong tea. It is also considered the ‘treasure trove of tea cultivars’ because of its rich tea germplasm resources. In the present study, the population structure and genetic diversity of 137 tea germplasms from Wuyi Mountain and its adjacent areas were analyzed by SNPs. The information index (I), observed heterozygosity (Ho), expected heterozygosity (He) and fixation index (F) polymorphisms of the selected SNPs were high, stable and reliable. Ho had an average of 0.389, while He had an average of 0.324, indicating that Wuyi Mountain tea germplasms had rich genetic diversity. The AMOVA results showed that genetic variation came mainly from intrapopulation variation, accounting for 66% of the total variation. The differences in the Fst and Nei values of tea germplasm between Wuyi Mountain and its adjacent areas are similar to the geographical differences. Multiple analyses based on high-quality SNPs found that the landraces of tea plants on Wuyi Mountain had different genetic backgrounds from the wild-type landraces and the landraces of Wuyi Mountain tea plants underwent population differentiation. This study provides a basis for the effective protection and utilization of tea germplasms on Wuyi Mountain and lays a foundation for identifying potential parents to optimize tea cultivation.
2
Gai, Zhongshuai, Yu Wang, Jutang Jiang, Hui Xie, Zhaotang Ding, Shibo Ding und Hui Wang. „The Quality Evaluation of Tea (Camellia sinensis) Varieties Based on the Metabolomics“. HortScience 54, Nr. 3 (März 2019): 409–15. http://dx.doi.org/10.21273/hortsci13713-18.
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The identification and evaluation of tea [Camellia sinensis (L.) O. Kuntze] germplasm resources are of great significance for tea plant breeding. In recent years, various methods, such as morphology, biochemistry, molecular markers, and sensory evaluation, have been used to evaluate the tea germplasm resources. However, the evaluation of tea germplasms based on metabolomics is rarely reported. In this study, we first measured the main agronomic characters and biochemical components of tea young shoots in spring, and then analyzed the metabolic profiles using gas chromatography-mass spectrometry (GC-MS) and liquid chromatography with tandem mass spectrometry (LC-MS/MS). The results indicate that tea germplasm accessions QN3 and QN38 had excellent agronomic traits with early germination and high yield compared with HM. The biosynthesis of flavonoids in young shoots of QN3 was more vigorous, especially for the biosynthesis of epigallocatechin gallate (EGCG) and epicatechin gallate (ECG). Accession QN3 had highest content of luteoloside, myricetin and rutin, whereas QN38 had highest content of most amino acids. On the basis of sensory quality evaluation, accession QN3 and QN38 all had higher total quality scores. By using these approaches, we found that QN3 and QN38 are excellent breeding materials with high yield and high quality for making green teas. We also believe that the evaluation system constructed by the approaches described here is suitable for the identification of tea germplasms.
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Ranatunga, Mahasen Achintiya Bandara, Jeevan Dananjaya Kottawa Arachchi, Kumudini Gunasekare und Deepthi Yakandawala. „Floral Diversity and Genetic Structure of Tea Germplasm of Sri Lanka“. International Journal of Biodiversity 2017 (19.09.2017): 1–11. http://dx.doi.org/10.1155/2017/2957297.
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The role of tea germplasm in crop improvement, though well recognized, yet lacks sufficient information depriving its optimum use. About 600 accessions are conserved as tea germplasm in Sri Lanka and only 4% have been frequently utilized in breeding. Floral morphological characters are useful descriptors for preliminary characterization of genetic resources and particularly pistil traits are considered as reliable criteria in taxonomical studies of higher plants. The objectives of the present study were to conduct a comprehensive analysis on floral diversity of tea germplasm to determine the nature and extent of genetic structure of tea germplasm and to categorize accessions into major taxa. Eighty-nine accessions from the tea germplasm were characterized using 16 floral traits. Results indicated presence of considerable variation among germplasm accessions. Accessions were categorized into five different groups based on the diversity of floral traits and highly discriminating accessions were identified based on the grouping pattern. Among the traits, pistil traits were highly variable compared to other traits. Tea germplasm is predominantly represented by Cambod type accessions (68%) followed by Assam types (20%). Availability of China type accessions is low. Gaps in the germplasm collection were identified and information generated can be used for decision making in future germplasm exploration missions and breeding programme.
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Jeganathan, Brasathe, P. A. Nimal Punyasiri, J. Dananjaya Kottawa-Arachchi, Mahasen A. B. Ranatunga, I. Sarath B. Abeysinghe, M. T. Kumudini Gunasekare und B. M. Ratnayake Bandara. „Genetic Variation of Flavonols Quercetin, Myricetin, and Kaempferol in the Sri Lankan Tea (Camellia sinensisL.) and Their Health-Promoting Aspects“. International Journal of Food Science 2016 (2016): 1–9. http://dx.doi.org/10.1155/2016/6057434.
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Flavonol glycosides in tea leaves have been quantified as aglycones, quercetin, myricetin, and kaempferol. Occurrence of the said compounds was reported in fruits and vegetable for a long time in association with the antioxidant potential. However, data on flavonols in tea were scanty and, hence, this study aims to envisage the flavonol content in a representative pool of accessions present in the Sri Lankan tea germplasm. Significant amounts of myricetin, quercetin, and kaempferol have been detected in the beverage type tea accessions of the Sri Lankan tea germplasm. This study also revealed that tea is a good source of flavonol glycosides. TheCamellia sinensisvar.sinensisshowed higher content of myricetin, quercetin, and total flavonols than var.assamicaand ssp.lasiocalyx. Therefore flavonols and their glycosides can potentially be used in chemotaxonomic studies of tea germplasm. The nonbeverage type cultivars, especiallyCamellia rosafloraandCamellia japonicaRed along with the exotic accessions resembling China type, could be useful in future germplasm studies because they are rich sources of flavonols, namely, quercetin and kaempferol, which are potent antioxidants. The flavonol profiles can be effectively used in choosing parents in tea breeding programmes to generate progenies with a wide range of flavonol glycosides.
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Zeng, Wen, Zhen Zeng, Jie Teng, Dylan O’Neill Rothenberg, Mengzhen Zhou, Ronghui Lai, Xingfei Lai et al. „Comparative Analysis of Purine Alkaloids and Main Quality Components of the Three Camellia Species in China“. Foods 11, Nr. 5 (22.02.2022): 627. http://dx.doi.org/10.3390/foods11050627.
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Tea (Camelliasinensis var. sinensis) is a widely consumed caffeine-containing beverage, however the Camellia genus also includes other species, which are consumed as tea in their local growing regions. Presently, HPLC analysis assessed 126 unique Camellia germplasms belonging to three Camellia species, C. sinensis var. pubilimba Chang (Csp), C. gymnogyna Chang (CgC) and C. crassicolumna Chang (CcC). Theobromine was the predominant purine alkaloid in all species, representing over 90% of purine alkaloids in Csp and CgC, and 50% in CcC. Significant variability existed in purine alkaloid patterns both between and within species, and some germplasms possessed highly unique alkaloid profiles. Sensory evaluation and quality composition analysis of green tea products produced from the three Camellia species suggested their unsuitability for use in tea production due to their unpalatable flavor. The results of this study revealed the differences in purine alkaloids and main quality components between Camellia species and tea, which contributed to understand why tea, rather than other Camellia species, has become a popular beverage in the world after long-term artificial selection. In addition, unique alkaloid profiles suggest usefulness of these germplasm resources in future breeding of decaffeinated tea plant varieties and alkaloid metabolism research.
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Zhao, Yichen, Runying Wang, Qing Liu, Xuan Dong und De-Gang Zhao. „Genetic Diversity of Ancient Camellia sinensis (L.) O.Kuntze in Sandu County of Guizhou Province in China“. Diversity 13, Nr. 6 (20.06.2021): 276. http://dx.doi.org/10.3390/d13060276.
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The ancient tea plant germplasm is an important resource for breeding new tea plant varieties and has great economic value. However, due to man-made and natural disturbances, it has become endangered. In order to have a better management of the conserved tea plant germplasm, it is a requirement to understand the genetic and phenotypic diversity. The aim of this study was to evaluate the genetic and phenotypic diversity of 145 ancient tea plant germplasm resources from five populations in Sandu County of Guizhou province in China. To explore the population genetics of tea plant, we successfully identified 15 simple sequence repeat (SSR) markers, which were highly polymorphic. Additionally, we applied traditional phenotypic methods to evaluate the tea plant diversity. The results suggested that the genetic and phenotypic diversity were relatively high. A total of 96 alleles were identified, and the mean polymorphic information content (PIC) value was found to be 0.66. The analysis of molecular variance (AMOVA) showed that genetic variation within the populations was greater than among the populations. Overall, our results are the valuable baseline data in developing more efficient management and breeding plans for one of the most popular non-alcoholic beverage crops, the tea plant species.
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Patel, Pradeep Kumar, Dapeng Zhang, Devajit Borthakur, Monpi Hazarika, Pulakesh Boruah, Raj Barooah, Santanu Sabhapondit, Naba Jyoti Neog und Romen Chandra Gogoi. „Quality Green Tea (Camellia sinensis L.) Clones Marked through Novel Traits“. Beverages 5, Nr. 4 (01.11.2019): 63. http://dx.doi.org/10.3390/beverages5040063.
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Tea clones and seed varieties released from Tocklai Tea Research Institutes are suitable primarily for manufacturing black tea (CTC/orthodox) while green tea manufactured from these clones are poor in quality. This led to identifying germplasm suitable for manufacturing green tea of high quality. Physiological parameters on net photosynthesis, transpiration, stomatal conductance, water-use efficiency, leaf temperature, and carboxylation efficiency of six selected germplasm (DH 1 and 2, DH 3 and 4, DH 5 and 6, DL 13, DL 25, and DL 39) were measured in first flush, second flush, rain flush, and autumn flush. Seasonal Yield, biochemical (L-theanine to total polyphenol ratio), and taster’s score were compared among seasons. Two protocols were used for green tea manufacturing, i.e., roasting and steaming. Significant differences in net photosynthesis (pn), stomatal conductance (gs), carboxylation efficiency (ci/ca), and yield were observed between flushes. Among the six test clones, the L-theanine to total polyphenol ratio found was highest in DH 5 and 6 in the roasting method. Structural and cluster analysis revealed that the DH clones genotypically occupied the same position as that of the popular green tea clone Longjing 43 of China and Yabukita of Japan, indicating suitability of these germplasm to develop new green tea clones. Clones DH 5 and 6 are suitable for green tea manufacturing and they can be released to the industry as new green tea clones. As far as manufacturing protocol is concerned, the roasting method of tea manufacturing was found superior over steaming.
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Wang, Liubin, Hanshuo Xun, Shirin Aktar, Rui Zhang, Liyun Wu, Dejiang Ni, Kang Wei und Liyuan Wang. „Development of SNP Markers for Original Analysis and Germplasm Identification in Camellia sinensis“. Plants 12, Nr. 1 (29.12.2022): 162. http://dx.doi.org/10.3390/plants12010162.
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Tea plants are widely grown all over the world because they are an important economic crop. The purity and authenticity of tea varieties are frequent problems in the conservation and promotion of germplasm resources in recent years, which has brought considerable inconvenience and uncertainty to the selection of parental lines for breeding and the research and cultivation of superior varieties. However, the development of core SNP markers can quickly and accurately identify the germplasm, which plays an important role in germplasm identification and the genetic relationship analysis of tea plants. In this study, based on 179,970 SNP loci from the whole genome of the tea plant, all of 142 cultivars were clearly divided into three groups: Assam type (CSA), Chinese type (CSS), and transitional type. Most CSA cultivars are from Yunnan Province, which confirms that Yunnan Province is the primary center of CSA origin and domestication. Most CSS cultivars are distributed in east China; therefore, we deduced that east China (mainly Zhejiang and Fujian provinces) is most likely the area of origin and domestication of CSS. Moreover, 45 core markers were screened using strict criteria to 179,970 SNP loci, and we analyzed 117 well-Known tea cultivars in China with 45 core SNP markers. The results were as follows: (1) In total, 117 tea cultivars were distinguished by eight markers, which were selected to construct the DNA fingerprint, and the remaining markers were used as standby markers for germplasm identification. (2) Ten pairs of parent and offspring relationships were confirmed or identified, and among them, seven pairs were well-established pedigree relationships; the other three pairs were newly identified. In this study, the east of China (mainly Zhejiang and Fujian provinces) is most likely the area of origin and domestication of CSS. The 45 core SNP markers were developed, which provide a scientific basis at the molecular level to identify the superior tea germplasm, undertake genetic relationship analysis, and benefit subsequent breeding work.
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Lee, Kyung Jun, Jung-Ro Lee, Raveendar Sebastin, Myoung-Jae Shin, Seong-Hoon Kim, Gyu-Taek Cho und Do Yoon Hyun. „Assessment of Genetic Diversity of Tea Germplasm for Its Management and Sustainable Use in Korea Genebank“. Forests 10, Nr. 9 (08.09.2019): 780. http://dx.doi.org/10.3390/f10090780.
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Tea (Camellia sinensis (L.) O. Kuntze) is cultivated in many developing Asian, African, and South American countries, and is the most widely consumed beverage in the world. It is of critical importance to understand the genetic diversity and population structure of tea germplasm for effective collection, conservation, and utilization. In this study, 410 tea accessions collected from South Korea were analyzed using 21 simple sequence repeat (SSR) markers. Among 410 tea accessions, 85.4% (350 accessions) were collected from Jeollanam-do. A total of 286 alleles were observed, and the genetic diversity and evenness were estimated to be on average 0.79 and 0.61, respectively, across all the tested samples. Using discriminant analysis of principal components, four clusters were detected in 410 tea accessions. Among them, cluster 1 showed a higher frequency of rare alleles (less than 1%). Using the calculation of the index of association and rbaD value, each cluster showed a clonal mode of reproduction. The result of analysis of molecular variance (AMOVA) showed that most of the variation observed was within populations (99%) rather than among populations (1%). The present study revealed the presence of lower diversity and simpler population structure in Korean tea germplasms. Consequently, more attention should be focused on collecting and conserving the new tea individuals to broaden genetic variation of new cultivars in future breeding of the tea plant.
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Lei, Xiaogang, Haoyu Li, Pingping Li, Huan Zhang, Zhaolan Han, Bin Yang, Yu Duan et al. „Genome-Wide Association Studies of Biluochun Tea Plant Populations in Dongting Mountain and Comprehensive Identification of Candidate Genes Associated with Core Agronomic Traits by Four Analysis Models“. Plants 12, Nr. 21 (30.10.2023): 3719. http://dx.doi.org/10.3390/plants12213719.
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The elite germplasm resources are key to the beautiful appearance and pleasant flavor of Biluochun tea. We collected and measured the agronomic traits of 95 tea plants to reveal the trait diversity and breeding value of Biluochun tea plant populations. The results revealed that the agronomic traits of Biluochun tea plant populations were diverse and had high breeding value. Additionally, we resequenced these tea plant populations to reveal genetic diversity, population structure, and selection pressure. The Biluochun tea plant populations contained two groups and were least affected by natural selection based on the results of population structure and selection pressure. More importantly, four non-synonymous single nucleotide polymorphisms (nsSNPs) and candidate genes associated with (−)-gallocatechin gallate (GCG), (−)-gallocatechin (GC), and caffeine (CAF) were detected using at least two GWAS models. The results will promote the development and application of molecular markers and the utilization of elite germplasm from Biluochun populations.
Dissertationen zum Thema "Tea germplasm"
1
Roy, Subhas Chandra. „Genomic fingerprinting of tea germplasm and analysis of transcript accumulation of a defense protein involved during induced systemic resistance“. Thesis, University of North Bengal, 2008. http://hdl.handle.net/123456789/1082.
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2
Assefa, Kebebew. „Phenotypic and molecular diversity in the Ethiopian cereal, tef [Eragrostis tef (Zucc.) Trotter] : implications on conservation and breeding /“. Alnarp : Dept. of Crop Science, Swedish Univ. of Agricultural Sciences, 2003. http://epsilon.slu.se/a426-ab.html.
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3
Hu, Chih-Yi, und 胡智益. „Studies on the Variations in Leaf Characters and DNA Sequences of Tea Germplasm in Taiwan“. Thesis, 2004. http://ndltd.ncl.edu.tw/handle/06317095045002314625.
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碩士國立臺灣大學
農藝學研究所
92
The main purposes of this study were: (1) to evaluate variation in leaf traits for variety identification, (2) to establish DNA fingerprints and a process for variety identification of tea, (3) to analyze the genetic diversity and/or parentage among germplasm of tea, and (4) to evaluate the feasibility of molecular identification for processed tea and tea mixtures from different varieties. According to the leaf traits investigated from 132 tea germplasm, the distribution of 7 qualitative traits, including bud color, leaf color, leaf shape, apex shape, base shape, bud hair and morphology of leaf teeth, except for leaf shape, were subjected to specific phenotypes. The quantitative traits, including leaf length, leaf width, leaf thickness, internode length, leaf area, length/width ratio, number of leaf teeth and angle of vein, leaf thickness, and length/ width ratio of mature leaf exhibited relatively low variation. By using UPGMA method, the cluster diagram based on 15 quantitative and qualitative leaf traits showed that the tea varieties could be divided into three groups according to the leaf shape and apex shape. Sixty-seven polymorphic bands with strong signal were amplified from 12 ISSR primers, which were prescreened from 100 primers. Furthermore, these 67 ISSR markers were used to develop the DNA fingerprints and analyze genetic diversity of tea germplasm. According to UPGMA method, the tea gerplasm could be divided into 6 groups: including C. tenuifolia group, Chyh Ya Sun Cha group, wild tea plants group, var. assamica and var. sinensis group, var. assamica with var. sinensis and their hybrid group and var. sinensis group. Some germplasm had high similarity in ISSR markers to other one, including Shiang Yuan and Shiang Eel, Dah Nan Wan Bair Mau Hour and Heh Mau Hour, Chin Shin Oolong and Wu Jin, Tzao joong and Chin Shin Tzao joong, Bair Yeh and Dah Pan, Jy Lan and Wen Sun Jy Lan, Chuh Du Bair Joong and Feng Tzy Lin. Similar grouping result was found in the principal coordination components analysis and the cluster diagram. Furthermore, the ISSR analysis revealed that there is quite large genetic diversity among tea germplasm in Taiwan (58%). Despite the high genetic diversity among germplasm, high percentage of it was contributed by the wild tea plants, and most important cultivars had high degree of similarity. The most important 22 cultivars and 3 newly bred varieties could be efficiently identified with ten ISSR markers amplified by three primers (818, 864 and 866). In the chloroplast DNA sequence analysis, 4 out of 5 primers could generate amplification products. There were 23 sites detected with DNA sequence variation in a total length of 4415 bp, including 17 single nucleotide polymorphism(SNPs) and 6 nucleotide insertion or deletion(Indels). The total variation length is 47 bp and the rate of variation is 1.06% in the survey of 15 tea germplasm. Therefore, the variation of chloroplast DNA sequences among germplasm is mainly SNPs , and it could be used to identify cultivars and to trace their female parents. In the mitochondria DNA sequence analysis, 6 of 8 primers could generate amplification products. There were 24 sites detected with DNA sequence variation in a total of 4415 bp length, including 9 SNPs and 15 Indels. The total variation length is 87 bp and the rate of variation is 1.21% in the comparison of 15 tea cultivars (similar to chloroplast). Therefore, the variation of mitochondrial DNA sequences among germplasm is mainly Indels. Similar result of cluster analysis was observed in chloroplast and mitochondria DNA sequences. Fifteen tea germplasm were classified into three groups, only Taiwan Sun Cha was done differently. According to the cytosomic sequences analysis, the sequence of TTES No. 18, resembled Shan instead of its female parent, Burma. Based on the leaf trait, ISSR DNA and cytosomic sequences analysis, Shiang Yuan, Shiang Eel and Gau Lu were identified as var. sinensis. And their larger leaf size was due to triploid. Besides, Chyh Ya Sun Cha might not be the same with Camellia sinensis. Different levels of fermented tea were investigated on the isolated DNA quality. The result indicated that high temperature (250℃) was the most devastating step to the DNA in processed tea. The bands of amplified ISSR DNA under 1000 bp had stable signals, and they could be used in cultivar identification. On the other hand, stable and specific bands with higher molecular weight were obtained by using cytosomic primers for all. It suggestes that applying DNA techniques in cultivar identification of processed tea is feasible. Furthermore, the tea mixtures from different varieties could be identified by cytosomic DNA sequences because the cytoplasmic genome is haploid with unique sequence.
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Tsai, I.-Chen, und 蔡依真. „The Study of the Genetic Diversity of the Germplasm of Camellia sinensis in Taiwan and the Development of DNA Fingerprinting for Taiwan Tea Cultivars“. Thesis, 2003. http://ndltd.ncl.edu.tw/handle/60523699323381523678.
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碩士國立臺灣大學
農藝學研究所
91
The primary goal of this research was to learn the genetic diversity among the common and released tea varieties in Taiwan. The DNA fingerprinting for each of the released cultivars was also established from the results of the experiments. Samples of 48 cultivars for the research were collected from the germplasm nursery of Taiwan Tea Experiment Station (TTES). The AFLP and RAPD molecular marker systems were applied to the analysis of the genetic diversity of the samples. Eight primer combinations of the AFLP primers were used in the analysis and resulted in more than six hundred bands. Four hundred and twenty three polymorphic bands were identified. The estimated genetic distance among the samples were ranging from 0.02 to 0.97. The samples were divided into three groups based on the cluster analysis of the estimated distance with UPGMA methodology. The number of varieties in each one of the three groups was 33, 12, and 3, respectively. Thirty-seven genotypic specific bands belong to 15 varieties were identified in the AFLP analysis. The number of unique bands in the 15 varieties was ranging from 1 to 6. The fingerprinting information for each one of eighteen released cultivars of TTES was established from the AFLP polymorphic bands. Twenty-four informative random primers selected from the survey of 100 primers were used to dissect the genetic diversity of the same set of samples. More than two hundred DNA fragments were amplified by the primers and 103 fragments were identified as polymorphic. The estimated genetic distance among the samples with the RAPD polymorphic fragment were ranging from 0.03 to 0.96. The samples were also divided into three groups based on the cluster analysis of the estimated genetic distance with UPGMA methodology. The grouping between the results of AFLP and RAPD analysis was showed to be less than 10% of discrepancy. The results of grouping from both of the DNA marker systems were consistent with the one based on agronomic traits. The relationship between the samples revealed by the DNA markers was also consistent with the pedigree records. The genetic diversity between the 18 released cultivars was suspected to be convergent in the literatures was proven to be otherwise with the evidence from the results. Several markers capable of distinguishing between var. sinensis and assamica were also identified from both the AFLP and RAPD analysis. The pubescence on the young leaf, which is considered to be highly correlated with tea quality, was studied as well. The characteristics of pubescence were associated with the genetic relationship revealed by the DNA markers between the var. sinensis and assamica. It is expected to make contribution in the tea breeding program in terms of reduction of the number of hybridization combination and improvement of the efficiency of selection in the progeny generations.
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Chang, Cheng, und 張捷. „Variety Selection of Higher Methylated Catechin Content Germplasm Resources and Studies of the Diversity of Taiwan Tea Cultivars Based on Total Catechins and Their Fractions“. Thesis, 2010. http://ndltd.ncl.edu.tw/handle/96333988107416093288.
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碩士大葉大學
生物產業科技學系
98
Using pan-fried green teas made from Taiwan as main teas in spring and autumn seasons, analysis and comparison their contents of catechins and catechin methyl ester, identify tea varieties containing high levels of catechin methyl ester, establishment the data of Taiwan's tea of catechins. According to principal component analysis and UPGMA method, evaluate season, suitability, catechins of tea varieties such as relevance. Evaluate content in distribution of catechins when selection breeding at different times of extension station of Taiwan and all teas species varieties.The results indicated that the autumn tea catechins were higher than the spring tea, but other than EGCG；Teas of Taiwan Tea Extension Station (TTES) No. 1 to 20, all have higher EGCG and total catechins contents than that from other tea varieties; partially fermented tea varieties have a higher content of catechin methyl ester. For TD004 (TTES No.4), its catechin methyl ester in spring and autumn has the average content of 3.3(g/100g d.w.). The highest mean average content of EGCG3 "Me was TD064 (Woan Joong), which has the highest concentrations of 1.6 (g/100g dw). Using the UPGMA method MVSP software to do cluster analysis on the tea species. The catechin profiles for TD007, TD085, TD093, TD100 are unique and not able to be grouped with most of the other tea varieties based on principal component analysis (PCA) and cluster analysis. PCA results also indicated that the parameters such as tea manufacturing suitability, the type of tea varieties released by TTES along the timeline, catechin content are related. Our results also indicated that wild teas in Taiwan have very different catechins content profiles in cluster analysis.The results in present research have established a germplasms database of teas in Taiwan and those data can be used to better serve the future of tea breeding.
Bücher zum Thema "Tea germplasm"
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Li, Taiqiang. Taiwan cha shu zhong yuan tu zhi: Qing zhu jian chang 100 zhou nian ji nian te kan = Tea germplasm resources in Taiwan. Taoyuan Xian Yangmei Zhen: Xing zheng yuan nong ye wei yuan hui cha ye gai liang chang, 2003.
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Yao, Ming-Zhe, und Liang Chen. „Tea Germplasm and Breeding in China“. In Global Tea Breeding, 13–68. Berlin, Heidelberg: Springer Berlin Heidelberg, 2012. http://dx.doi.org/10.1007/978-3-642-31878-8_2.
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Khan, Abdul Qayyum. „Tea Germplasm and Improvement in Bangladesh“. In Global Tea Breeding, 289–97. Berlin, Heidelberg: Springer Berlin Heidelberg, 2012. http://dx.doi.org/10.1007/978-3-642-31878-8_9.
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Ni, Sui, Ming-Zhe Yao, Liang Chen, Li-Ping Zhao und Xin-Chao Wang. „Germplasm and Breeding Research of Tea Plant Based on DNA Marker Approaches“. In Global Tea Breeding, 361–76. Berlin, Heidelberg: Springer Berlin Heidelberg, 2012. http://dx.doi.org/10.1007/978-3-642-31878-8_14.
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4
Ketema, Seyfu. „Germplasm evaluation and breeding work on teff (Eragrostis tef) in Ethiopia“. In Plant Genetic Resources of Ethiopia, 323–28. Cambridge University Press, 1991. http://dx.doi.org/10.1017/cbo9780511551543.027.
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Jordan, Ramon L., Abed Gera, Hei-Ti Hsu, Andre Franck und Gad Loebenstein. Detection and Diagnosis of Virus Diseases of Pelargonium. United States Department of Agriculture, Juli 1994. http://dx.doi.org/10.32747/1994.7568793.bard.
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Pelargonium (Geranium) is the number one pot plant in many areas of the United States and Europe. Israel and the U.S. send to Europe rooted cuttings, foundation stocks and finished plants to supply a certain share of the market. Geraniums are propagated mainly vegetatively from cuttings. Consequently, viral diseases have been and remain a major threat to the production and quality of the crop. Among the viruses isolated from naturally infected geraniums, 11 are not specific to Pelargonium and occur in other crops while 6 other viruses seem to be limited to geranium. However, several of these viruses are not sufficiently characterized to conclude that they are distinct agents and their nomenclature and taxonomy are confusing. The ability to separate, distinguish and detect the different viruses in geranium will overcome obstacles te developing effective detection and certification schemes. Our focus was to further characterize some of these viruses and develop better methods for their detection and control. These viruses include: isolates of pelargonium line pattern virus (PLPV), pelargonium ringspot virus (PelRSV), pelargonium flower break virus (PFBV), pelargonium leaf curl (PLCV), and tomato ringspot virus (TomRSV). Twelve hybridoma cell lines secreting monoclonal antibodies specific to a geranium isolate of TomRSV were produced. These antibodies are currently being characterized and will be tested for the ability to detect TomRSV in infected geraniums. The biological, biochemical and serological properties of four isometric viruses - PLPV, PelRSV, and PFBV (and a PelRSV-like isolate from Italy called GR57) isolated from geraniums exhibiting line and ring pattern or flower break symptoms - and an isolate ol elderbeny latent virus (ELV; which the literature indicates is the same as PelRSV) have been determined Cloned cDNA copies of the genomic RNAs of these viruses were sequenced and the sizes and locations of predicted viral proteins deduced. A portion of the putative replicase genes was also sequenced from cloned RT-PCR fragments. We have shown that, when compared to the published biochemical and serological properties, and sequences and genome organizations of other small isometric plant viruses, all of these viruses should each be considered new, distinct members of the Carmovirus group of the family Tombusviridae. Hybridization assays using recombinant DNA probes also demonstrated that PLPV, PelRSV, and ELV produce only one subgenomic RNA in infected plants. This unusual property of the gene expression of these three viruses suggests that they are unique among the Carmoviruses. The development of new technologies for the detection of these viruses in geranium was also demonstrated. Hybridization probes developed to PFBV (radioactively-labeled cRNA riboprobes) and to PLPV (non-radioactive digoxigenin-labeled cDNAs) were generally shown to be no more sensitive for the detection of virus in infected plants than the standard ELISA serology-based assays. However, a reverse transcriptase-polymerase chain reaction assay was shown to be over 1000 times more sensitive in detecting PFBV in leaf extracts of infected geranium than was ELISA. This research has lead to a better understanding of the identity of the viruses infecting pelargonium and to the development of new tools that can be used in an improved scheme of providing virus-indexed pelargonium plants. The sequence information, and the serological and cloned DNA probes generated from this work, will allow the application of these new tools for virus detection, which will be useful in domestic and international indexing programs which are essential for the production of virus-free germplasm both for domestic markets and the international exchange of plant material.