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Artykuły w czasopismach na temat "Wide hybridisation"

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Knipler, Monica L., Mark Dowton i Katarina Maryann Mikac. "Genome-Wide SNPs Detect Hybridisation of Marsupial Gliders (Petaurus breviceps breviceps × Petaurus norfolcensis) in the Wild". Genes 12, nr 9 (27.08.2021): 1327. http://dx.doi.org/10.3390/genes12091327.

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Petaurus breviceps and Petaurus norfolcensis have produced hybrids in captivity, however there are no reported cases of Petaurus hybridisation in the wild. This study uses morphological data, mitochondrial DNA, and nuclear genome-wide SNP markers to confirm P. breviceps breviceps × P. norfolcensis hybridisation within their natural range on the central coast of New South Wales, Australia. Morphological data identified a potential hybrid that was confirmed with next-generation sequencing technology and 10,111 genome-wide SNPs. Both STRUCTURE and NewHybrid analyses identified the hybrid as a P. norfolcensis backcross, which suggests an initial F1 hybrid was fertile. The mitochondrial DNA matched that of a P. b. breviceps, indicating that a P. b. breviceps female initially mated with a P. norfolcensis male to produce a fertile female offspring. Our study is an important example of how genome-wide SNPs can be used to identify hybrids where the distribution of congeners overlaps. Hybridisation between congeners is likely to become more frequent as climate changes and habitats fragment, resulting in increased interactions and competition for resources and mates.
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Tiesmeyer, Annika, Luana Ramos, José Manuel Lucas, Katharina Steyer, Paulo C. Alves, Christos Astaras, Mareike Brix i in. "Range-wide patterns of human-mediated hybridisation in European wildcats". Conservation Genetics 21, nr 2 (25.01.2020): 247–60. http://dx.doi.org/10.1007/s10592-019-01247-4.

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Burke, Katherine, i Angus Clarke. "The challenge of consent in clinical genome-wide testing". Archives of Disease in Childhood 101, nr 11 (28.04.2016): 1048–52. http://dx.doi.org/10.1136/archdischild-2013-304109.

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Genome-wide testing methods include array comparative genomic hybridisation (aCGH), multiple gene panels, whole exome sequencing (WE) and whole genome sequencing (WGS). Here we introduce some of the key ethical and social considerations relating to informed consent for the testing of children, particularly the management of incidental findings and variants of unknown significance.
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Ebersbach, Jana, Natalia Tkach, Martin Röser i Adrien Favre. "The Role of Hybridisation in the Making of the Species-Rich Arctic-Alpine Genus Saxifraga (Saxifragaceae)". Diversity 12, nr 11 (23.11.2020): 440. http://dx.doi.org/10.3390/d12110440.

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Evolutionary processes fuelling rapid species diversification are not yet fully understood, although their major contribution to overall patterns of plant biodiversity is well established. Hybridisation is among the least understood of these processes, despite its multifaceted role in speciation processes being widely accepted. Species of the large arctic-alpine genus Saxifraga are notorious for their ability to hybridise; however, the overall role of hybridisation and polyploidisation for the diversification of this genus remains unknown. Here, we provide a comprehensive genus-wide review of hybridisation accounts and ploidy levels. We find that the sections of Saxifraga vary greatly in their propensity to hybridise. The majority of natural hybridisation accounts are from recent localised events (n = 71). Hybridisation hotspots were located in the Pyrenees and the European Alps, thus contrasting with the overall distribution of species richness in the genus. Hybrids or hybrid populations are often short-lived in Saxifraga due to a multitude of reproductive barriers, most commonly low F1 hybrid fertility. However, these barriers are not always fully effective, allowing for backcrossing and the formation of hybrid swarms. In addition, we find that the incidence of polyploidy varies widely across different sections of Saxifraga, with species-rich sections Porphyrion and Saxifraga showing divergent polyploidy proportions. Overall, we show that hybridisation and polyploidisation played differential roles in the diversification of this large genus. Nevertheless, a significant proportion of species are yet to be scrutinised, particularly among the Asian Saxifraga species, illustrating the need for systematic further study to fully unravel the role of hybridisation during the evolution of Saxifraga.
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Canestrelli, Daniele, Roberta Bisconti, Andrea Chiocchio, Luigi Maiorano, Mauro Zampiglia i Giuseppe Nascetti. "Climate change promotes hybridisation between deeply divergent species". PeerJ 5 (23.03.2017): e3072. http://dx.doi.org/10.7717/peerj.3072.

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Rare hybridisations between deeply divergent animal species have been reported for decades in a wide range of taxa, but have often remained unexplained, mainly considered chance events and reported as anecdotal. Here, we combine field observations with long-term data concerning natural hybridisations, climate, land-use, and field-validated species distribution models for two deeply divergent and naturally sympatric toad species in Europe (Bufo bufoandBufotes viridisspecies groups). We show that climate warming and seasonal extreme temperatures are conspiring to set the scene for these maladaptive hybridisations, by differentially affecting life-history traits of both species. Our results identify and provide evidence of an ultimate cause for such events, and reveal that the potential influence of climate change on interspecific hybridisations goes far beyond closely related species. Furthermore, climate projections suggest that the chances for these events will steadily increase in the near future.
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Weiss, M. M. "Genome wide array comparative genomic hybridisation analysis of premalignant lesions of the stomach". Molecular Pathology 56, nr 5 (1.10.2003): 293–98. http://dx.doi.org/10.1136/mp.56.5.293.

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Partridge, Wu i Bucknall. "Investigation on the Impact of Degree of Hybridisation for a Fuel Cell Supercapacitor Hybrid Bus with a Fuel Cell Variation Strategy". Vehicles 2, nr 1 (19.12.2019): 1–17. http://dx.doi.org/10.3390/vehicles2010001.

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This paper presents the development of a control strategy for a fuel cell and supercapacitor hybrid power system for application in a city driving bus. This aims to utilise a stable fuel cell power output during normal operation whilst allowing variations to the power output based on the supercapacitor state-of-charge. This provides flexibility to the operation of the system, protection against over-charge and under-charge of the supercapacitor and gives flexibility to the sizing of the system components. The proposed control strategy has been evaluated using validated Simulink models against real-world operating data collected from a double-decker bus operating in London. It was demonstrated that the control strategy was capable of meeting the operating power demands of the bus and that a wide range of degrees of hybridisation are viable for achieving this. Comparison between the degree of hybridisation proposed in this study and those in operational fuel cell (FC) hybrid buses was carried out. It was found that the FC size requirement and FC variation can be significantly reduced through the use of the degree of hybridisation identified in this study.
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Kumari, Madhu, Raj Kumar Mittal, Rakesh Kumar Chahota, Kalpna Thakur, Swaran Lata i Dorin Gupta. "Assessing genetic potential of elite interspecific and intraspecific advanced lentil lines for agronomic traits and their reaction to rust (Uromyces viciae-fabae)". Crop and Pasture Science 69, nr 10 (2018): 999. http://dx.doi.org/10.1071/cp17145.

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The narrow genetic base of lentil (Lens culinaris) has challenged the efforts of breeders to increase its productivity under changing environmental conditions. Inclusion of wild species and diverse cultivated genotypes offers an opportunity to generate new variation through wide hybridisation to broaden the genetic base of cultivated lentil. We evaluated 96 elite, interspecific (L. culinaris × L. orientalis) and intraspecific advanced lentil genotypes along with four checks to determine the extent of genetic variation, resistance to lentil rust (Uromyces viciae-fabae), and the nature and magnitude of their genetic divergence. Sufficient genetic variability was revealed for all of the traits. High heritability and genetic advance were recorded for number of seeds per pod, number of pods per plant, seed yield per plant and biomass per plant. A positive correlation was recorded between grain yield and ten important plant traits. Statistical (D2) and molecular analyses grouped all genotypes into two main clusters and revealed sufficient genetic diversity among advanced lines. Our study showed promising results for creating new variation through wide hybridisation and identified lines L-354 and L-437-1 (rust-resistant) and HPLL-32 (moderately rust-resistant) superior for seed yield and related traits.
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Healey, Adam, David J. Lee, Agnelo Furtado i Robert J. Henry. "Evidence of inter-sectional chloroplast capture in Corymbia among sections Torellianae and Maculatae". Australian Journal of Botany 66, nr 5 (2018): 369. http://dx.doi.org/10.1071/bt18028.

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Chloroplast capture through hybridisation and introgression is well described within Eucalyptus. Despite the propensity of the Corymbia genus (eucalypts) to form hybrids from wide crosses, description of chloroplast capture in Corymbia has, until recently, been limited. In this study our aim was to investigate evidence of intersectional chloroplast capture between sections Torellianae and Maculatae. Using whole-genome next-generation sequencing data, the complete chloroplast genomes were assembled from four Corymbia taxa: Corymbia citriodora subspecies citriodora (Hook.) K.D.Hill & L.A.S.Johnson, Corymbia citriodora subspecies variegata (F.Muell.) A.R.Bean & M.W.McDonald, Corymbia henryi (S.T.Blake) K.D.Hill & L.A.S.Johnson, and Corymbia torelliana (F.Muell.) K.D.Hill & L.A.S.Johnson, represented by eight genotypes. Phylogenetic analysis and comparison among Corymbia chloroplast genomes and nuclear external transcribed spacer (ETS) sequences revealed chloroplast capture among Corymbia species across distinct sections Torellianae and Maculatae within subgenus Blakella. Reticulate evolution, along with Eucalyptus, likely extends into Corymbia as evidenced by incongruent plastid and nuclear phylogenetic trees, suggestive of its importance of hybridisation and introgression during the evolution of eucalypts.
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Ghani, Muhammad Awais, Qian Sun, Junxing Li, Liwen Cao, Linli Rao, Xiaoxia Zou i Liping Chen. "Phenotypic and genetic variation occurred during wide hybridisation and allopolyploidisation between Brassica rapa and Brassica nigra". Scientia Horticulturae 176 (wrzesień 2014): 22–31. http://dx.doi.org/10.1016/j.scienta.2014.06.029.

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Rozprawy doktorskie na temat "Wide hybridisation"

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Datta, Krishna. "Wide hybridisation and isozyme, RAPD and RFLP markers of #Corchorus' species". Thesis, Imperial College London, 1995. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.283339.

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Shah, Azad Hussain. "Development of techniques for wide hybridisation of the genus Lupinus L". Thesis, University of Southampton, 2002. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.396202.

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Schelfhout, Christopher James. "DNA marker assisted breeding in interspecific crosses to improve canola (Brassica napus L.)". University of Western Australia. School of Plant Biology, 2008. http://theses.library.uwa.edu.au/adt-WU2008.0167.

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[Truncated abstract] In order to expand the gene pool of canola-quality rapeseed (Brassica napus) reciprocal interspecific crosses were made between B. napus cv. Mystic and near canola-quality B. juncea breeding line JN29. F1 progeny from these crosses were used to make backcrosses to both parents in all possible combinations and directions, and were selfed to form F2-derived lines. The highest frequencies of viable F2 and BC1 progeny were obtained when B. napus was the maternal parent of the interspecific hybrid. BC1 and F2 progeny (and subsequent generations) were grown under field conditions to identify agronomic improvements over the parents. Transgressive segregation was observed in F2 and BC1 and in subsequent generations for agronomic traits (seed yield under high or low rainfall conditions, plant biomass, harvest index, height, branching and days to anthesis) and seed quality traits (oil, protein, glucosinolates, oleic acid). The majority of progeny conformed to B. napus morphology, and a minority segregated to B. juncea morphology in subsequent generations. Some of the B. juncea morphotypes had lower glucosinolates and higher oleic acid than the parent JN29, with no detectable erucic acid, and thereby conformed to canola quality. Methods were developed for tracing B-genome in interspecific progeny. A repetitive DNA sequence pBNBH35 from B. nigra (genome BB, 2n = 16) was used to identify B-genome chromosomes and introgressions in interspecific progeny. Specific primers were designed for pBNBH35 in order to amplify the repetitive sequence by PCR. A cloned sub-fragment of 329 bp was confirmed by sequencing as part of pBNBH35. PCR and hybridisation techniques were used on an array of Brassica species to confirm that the pBNBH35 subfragment was Brassica B-genome specific. Fluorescence in situ hybridisation (FISH) in B nigra, B. juncea (AABB, 2n=36) and B. napus (AACC, 2n=38) showed that the pBNBH35 sub-fragment was present on all eight Brassica Bgenome chromosomes and absent from A- and C-genome chromosomes. The pBNBH35 repeat was localised to the centromeric region of each B-genome chromosome. FISH clearly distinguished the B-genome chromosomes from the A-genome chromosomes in the amphidiploid species B. juncea. This is the first known report of a B-genome repetitive marker that is present on all Brassica Bgenome chromosomes. ... The results suggest that novel B. napus genotypes have been generated containing introgressions of B-genome chromatin from B. juncea chromosomes. B. juncea morphology occurred in interspecific progeny with a chromosome complement similar to B. napus (2n = 38) and without the entire Bgenome present. It also is highly likely that recombination has occurred between the A-genome of the two Brassica species. This research has demonstrated that the secondary gene pool of B. napus may be accessed by selfing interspecific hybrids, and without sacrificing canola quality, if the B. juncea parent is near canola-quality. Interspecific progeny may be screened to enhance the proportion with B-genome positive signals. Some progeny with B. junceatype morphology had improved seed quality over the JN29 parent.
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Książki na temat "Wide hybridisation"

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Ellneskog-Staam, Pernilla. Relationships in the Triticeae: Genomes and wide hybridisations. Uppsala: Swedish Univ. of Agricultural Sciences, 2002.

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Schaub, Jean-Frédéric. Violence in the Atlantic. Redaktorzy Nicholas Canny i Philip Morgan. Oxford University Press, 2012. http://dx.doi.org/10.1093/oxfordhb/9780199210879.013.0007.

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The shaping of an Atlantic world during the first two centuries of Europe's overseas expansion saw an increase in the use and intensity of violence. Conquest, beginning with the Atlantic archipelagos (Canary Islands, Hispaniola, Santo Domingo), led to massacres and the elimination of populations. The diseases that Europeans brought with them may have done the most to wipe out the Canary Islanders during the fifteenth century, and the Tainos during the first decades of the sixteenth century, but harsh quasi-genocidal actions contributed to the indigenes' demise. The burgeoning Atlantic slave trade was also an especially violent phenomenon. Captivity and slavery by no means began with the exploitation of Atlantic space but the global dimensions of the pressure on African populations, during the sixteenth and particularly during the second half of the seventeenth century, escalated the practice. This article examines the mass murder, religion and violence, violence and the judiciary, alliance, rape, racial and cultural hybridisation, and narratives of captivity and violence.
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Forshaw, Joseph M., Mark Shephard OAM i Anthony Pridham. Grassfinches in Australia. CSIRO Publishing, 2012. http://dx.doi.org/10.1071/9780643107878.

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It is not surprising that Australian grassfinches are highly popular with ornithologists and aviculturists, for included among the species are one of the most beautiful of all birds – the Gouldian Finch Erythrura gouldiae – and one of the most familiar cagebirds – the Zebra Finch Taeniopygia guttata. Despite a scarcity in published works on finches, interest in the species is growing, leading to a dramatic advancement in our knowledge of many species. For example, we have gained new information from field observations carried out on little-known species, including the Blue-faced Parrot-Finch Erythrura trichroa and the Red-eared Firetail Stagonopleura oculata. Significant advances in taxonomic research, largely as a consequence of the development and refinement of biochemical analyses, often involving DNA-DNA hybridisation, have given us a new insight into relationships among species, with some unexpected alliances being determined. Additionally, dramatic changes have taken place in avicultural practices, and in virtually all countries aviculture has taken on a new professional approach, with the most notable results being increased productivity and success with a wider variety of species. After a lapse of almost half a century since publication of Klaus Immelmann’s eminent work on finches, based on extensive field studies, the time has come for a new examination of Australian grassfinches. In Grassfinches in Australia, Joseph Forshaw, Mark Shephard and Anthony Pridham have summarised our present knowledge of each species, and have given readers a visual appreciation of the birds in their natural habitats and in aviculture. The resulting combination of superb artwork and scientifically accurate text ensures that this volume will become the standard reference work on Australian grassfinches. In addition to enabling aviculturists to know more about these finches in the wild as a guide to their own husbandry techniques, detailed information on current management practices for all species in captivity is provided. The book also includes colour plates depicting some of the more common mutations held in Australian and overseas collections. 2013 Whitley Award Commendation for Illustrated Zoology.
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Części książek na temat "Wide hybridisation"

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Houben, Andreas, i Richard Pickering. "Applying Cytogenetics and Genomics to Wide Hybridisations in the Genus Hordeum". W Genetics and Genomics of the Triticeae, 137–62. New York, NY: Springer US, 2009. http://dx.doi.org/10.1007/978-0-387-77489-3_5.

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Fasano, Francesco. "Il corpo malato e la crisi dell'identità unitaria". W America: il racconto di un continente | América: el relato de un continente. Venice: Edizioni Ca' Foscari, 2019. http://dx.doi.org/10.30687/978-88-6969-319-9/030.

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Illness seems to be a central theme for contemporary Latin-American literature. It is not only the object of the observation, but also a critical instrument to debilitate strong categories and binomes (such as male/female, sane/sick, alive/dead, human/non-human). This essay analyses the processes of hybridisation and metamorphosis related to illness in El huésped by Guadalupe Nettel and Fruta podrida by Lina Meruane. This examples show two different possibilities to embody the pathological experience: living against it and living with it. Illness could be an unpleasant partner, and there is no way to identify ourself with her, or a part of a wider us, opening to non-unitarian identity such as complexes and transforming organism. This consideration shows how Latin-American literature reflects on identity in a queer and posthuman way trough the metaphors that illness bring to the table.
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Streszczenia konferencji na temat "Wide hybridisation"

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Kramb, Marc, i Rolf Slatter. "The role of magnetic sensors in the hybridisation and electrification of vehicles". W 19th International Congress of Metrology (CIM2019), redaktor Sandrine Gazal. Les Ulis, France: EDP Sciences, 2019. http://dx.doi.org/10.1051/metrology/201926007.

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Electrical currents need to be measured in a wide variety of different applications in the field of power electronics. However, the requirements for these measurement devices are becoming steadily more demanding regarding accuracy, size and especially bandwidth. In order to increase the power density of power electronics, as particularly important in the field of electromobility, there is a clear causal chain. Soft switching leads to higher efficiency and higher frequencies, which enable smaller dimensions for a given power output. Higher switching frequencies allow the size of magnetic components to be reduced significantly, resulting in more compact and lighter designs. This trend is now being reinforced by use of new wide bandgap semiconductor materials like silicon carbide (SiC) and gallium nitride (GaN), as their low on-resistances and low parasitic capacitances reduce switching losses. Conventional current sensor solutions, e.g. hallor shunt based sensors exhibit a limited bandwidth, typically less than 250 kHz. Other current sensors, like those based on the Rogowski-Coil, are capable of highly dynamic current measurement, but are significantly more expensive, larger and hence not suitable for large series applications. Furthermore, Rogowski-Coils are only capable of measuring alternating currents (AC), which prevents their use in applications where DC currents must also be measured. In order to meet the above mentioned requirements, magnetoresistive (MR) current sensors are ideally suited due to the fact that the bandwidth of the magnetoresistive effect extends up into the GHz-range. This paper describes the principle of operation and main performance characteristics of highly integrated MR current sensors and describes their benefits compared to other types of current sensor, in particular with regard to applications in the hybridisation and electrification of vehicles.
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Punch, Jeff, Bryan Rodgers, David Newport i Mark Davies. "Thermal Analysis of a Micro-Polymerase Chain Reaction Device". W ASME 2004 International Mechanical Engineering Congress and Exposition. ASMEDC, 2004. http://dx.doi.org/10.1115/imece2004-59161.

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Micro-scale polymerase chain reaction (micro-PCR) systems offer substantial advantages over macro-scale systems. Smaller sample volumes are required, and faster process times are feasible. Thermal control of micro-PCR systems is a substantial technical challenge, however. The PCR process requires the fluid sample to be cycled through three temperature ranges — typically 90–95°C, 50–65°C and 72–77°C for denaturation, hybridisation and replication respectively. Durations of the three steps are required to be in the ratio of 4:4:9. In this paper, the thermal analysis of a continuous flow micro-PCR device is reported. The objective of the analysis is to optimize the thermal performance of the device for fast amplification cycles with high efficiency - an efficient PCR features rapid heating and cooling between steps, and good temperature uniformity within each step. The device comprises an array of parallel microchannels formed within a polypropylene substrate to carry fluid, with the base of the substrate mounted on an aluminium carrier. Substrate depth is 500 micron, and each channel is 60 micron wide by 40 micron deep. Thermoelectric cells (TECs) are bonded to the carrier, and powered by a thermoelectric controller with feedback from sensors embedded in the carrier. A Pyrex Glass slide is bonded to the substrate to form closed channels. Arrays of film heaters mounted on the slide adjacent to the channel are used to establish the required temperature regions along the channel. By pumping the fluid at a fixed flow rate, temperature cycling of specific period is achieved. Thermal analysis of the substrate is performed using an approximate closed-form solution, in conjunction with Finite Element (FE) and Computational Fluid Dynamics (CFD) simulations. The analysis is used to conduct a parametric study in order to determine the optimum configurations of substrate materials, cooling conditions, heaters and flow rates required to impose specific temperature cycles. The use of thermoelectric cells is shown to increase the rate of change of temperature between the various regions, improving the efficiency and decreasing the cycle time of the PCR process. Cycle times of 6s or less are shown to be feasible, yielding benefits in time saved for multiple amplifications. Finally, the analysis is also used to identify the dimensionless parameters which govern the thermal characteristics of the device, illustrating the importance of the Biot number.
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