نتایج جستجو برای: rye introgression

تعداد نتایج: 7336  

2003
JUAN ORELLANA

T h e use of telomeric C-bands in wheat-rye hybrids has made it possible to distinguish three types of wheat-wheat ( IBL) and wheat-rye associations (a, endto-end extremely distal; b , end-to-ed distal; and c, interstitial) between homoeologous chromosomes at different metaphase I stages (early, middle and late) and also to estimate the actual recombination frequencies for such associations at ...

2011
Hanna Isaksson Allah Rakha Roger Andersson Helena Fredriksson Johan Olsson Per Åman

BACKGROUND The structure of whole grain cereals is maintained to varying degrees during processing and preparation of foods. Food structure can influence metabolism, including perceived hunger and satiety. A diet that enhances satiety per calorie may help to prevent excessive calorie intake. The objective of this work was to compare subjective appetite ratings after consumption of intact and mi...

Journal: :The American journal of clinical nutrition 2002
Katri S Juntunen Leo K Niskanen Kirsi H Liukkonen Kaisa S Poutanen Jens J Holst Hannu M Mykkänen

BACKGROUND Various botanical and structural characteristics of starchy food modify the postprandial glucose and insulin responses in humans. OBJECTIVE We investigated what factors in grain products affect human glucose and insulin responses and elucidated the mediating mechanisms. DESIGN Ten men and 10 women [mean age: 28 +/- 1 y; mean body mass index (in kg/m(2)): 22.9 +/- 0.7] with normal...

Journal: :Human biology 2017
John Hawks

Human populations have a complex history of introgression and of changing population size. Human genetic variation has been affected by both these processes, so inference of past population size depends upon the pattern of gene flow and introgression among past populations. One remarkable aspect of human population history as inferred from genetics is a consistent "wave" of larger effective pop...

Journal: :Genetics 2002
Agnès Bouchez Frédéric Hospital Mathilde Causse André Gallais Alain Charcosset

This article reports the marker-assisted introgression of favorable alleles at three quantitative trait loci (QTL) for earliness and grain yield among maize elite lines. The QTL were originally detected in 1992 by means of ANOVA in a population of 96 recombinant inbred lines (RILs). Introgression started from a selected RIL, which was crossed three times to one of the original parents and then ...

Journal: :Evolution; international journal of organic evolution 2008
Mathias Currat Manuel Ruedi Rémy J Petit Laurent Excoffier

Despite hundreds of reports involving both plants and animals, the mechanisms underlying introgression remain obscure, even if some form of selection is frequently invoked. Introgression has repeatedly been reported in species that have recently colonized a new habitat, suggesting that demographic processes should be given more attention for understanding the mechanisms of introgression. Here w...

2016
Brice A. J. Sarver John R. Demboski Jeffrey M. Good Nicholas Forshee Samuel S. Hunter Jack Sullivan

Many species are not completely reproductively isolated, resulting in hybridization and genetic introgression. Organellar genomes, such as those derived from mitochondria (mtDNA) and chloroplasts, introgress frequently in natural systems; however, the forces shaping patterns of introgression are not always clear. Here, we investigate extensive mtDNA introgression in western chipmunks, focusing ...

2017
João P. Marques Liliana Farelo Joana Vilela Dan Vanderpool Paulo C. Alves Jeffrey M. Good Pierre Boursot José Melo-Ferreira

Introgressive hybridization is an important and widespread evolutionary process, but the relative roles of neutral demography and natural selection in promoting massive introgression are difficult to assess and an important matter of debate. Hares from the Iberian Peninsula provide an appropriate system to study this question. In its northern range, the Iberian hare, Lepus granatensis, shows a ...

Journal: :Genome research 2010
Daniel E Neafsey Bridget M Barker Thomas J Sharpton Jason E Stajich Daniel J Park Emily Whiston Chiung-Yu Hung Cody McMahan Jared White Sean Sykes David Heiman Sarah Young Qiandong Zeng Amr Abouelleil Lynne Aftuck Daniel Bessette Adam Brown Michael FitzGerald Annie Lui J Pendexter Macdonald Margaret Priest Marc J Orbach John N Galgiani Theo N Kirkland Garry T Cole Bruce W Birren Matthew R Henn John W Taylor Steven D Rounsley

We have sequenced the genomes of 18 isolates of the closely related human pathogenic fungi Coccidioides immitis and Coccidioides posadasii to more clearly elucidate population genomic structure, bringing the total number of sequenced genomes for each species to 10. Our data confirm earlier microsatellite-based findings that these species are genetically differentiated, but our population genomi...

2016
Hernán E. Morales Paul Sunnucks Leo Joseph Alexandra Pavlova

Differential introgression of mitochondrial versus nuclear DNA generates discordant patterns of geographic variation and can promote speciation. We examined a potential case of mitochondrial introgression leading to two perpendicular axes of differentiation. The Eastern Yellow Robin, a widespread Australian bird, shows a deep mitochondrial split that is perpendicular to north-south nuclear DNA ...

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