Results 21 to 30 of about 1,556,760 (310)

Levels of genetic polymorphism: marker loci versus quantitative traits [PDF]

open access: yes, 1998
Species are the units used to measure ecological diversity and alleles are the units of genetic diversity. Genetic variation within and among species has been documented most extensively using allozyme electrophoresis.
Butlin R. K.   +9 more
core   +3 more sources

Top Ten Most Important U.S.-Regulated and Emerging Plant-Parasitic Nematodes

open access: yesHorticulturae, 2022
Plant-parasitic nematodes (PPNs) are important pests that cause an estimated ten billion dollars of crop loss each year in the United States and over 100 billion dollars globally.
Mihail Kantor   +3 more
doaj   +1 more source

History and structure of the closed pedigreed population of Icelandic Sheepdogs [PDF]

open access: yes, 2009
Background - Dog breeds lose genetic diversity because of high selection pressure. Breeding policies aim to minimize kinship and therefore maintain genetic diversity.
Pieter A Oliehoek   +27 more
core   +1 more source

Chloroplast microsatellites: measures of genetic diversity and the effect of homoplasy [PDF]

open access: yes, 2005
Chloroplast microsatellites have been widely used in population genetic studies of conifers in recent years. However, their haplotype configurations suggest that they could have high levels of homoplasy, thus limiting the power of these molecular markers.
Doyle JJ   +15 more
core   +4 more sources

Genome analysis of the ubiquitous boxwood pathogen Pseudonectria foliicola [PDF]

open access: yesPeerJ, 2018
Boxwood (Buxus spp.) are broad-leaved, evergreen landscape plants valued for their longevity and ornamental qualities. Volutella leaf and stem blight, caused by the ascomycete fungi Pseudonectria foliicola and P.
Yazmín Rivera   +4 more
doaj   +2 more sources

Mixture or mosaic? Genetic patterns in UK grey squirrels support a human-mediated ‘long-jump’ invasion mechanism [PDF]

open access: yes, 2016
Aim Clarifying whether multiple introductions of a species remain relatively isolated or merge and interbreed is essential for understanding the dynamics of invasion processes.
Carbone, C   +4 more
core   +1 more source

Climatic niche and neutral genetic diversity of the six Iberian pine species: a retrospective and prospective view [PDF]

open access: yes, 2010
Quaternary climatic fluctuations have left contrasting historical footprints on the neutral genetic diversity patterns of existing populations of different tree species.
Soto de Viana, Álvaro
core   +2 more sources

The Diversification of Downy Mildew Species Was Not Driven by the Loss of Mycorrhizal Associations or the Evolution of C4 Photosynthesis

open access: yesPhytoFrontiers, 2022
There are approximately 700 obligate biotrophic species grouped into 20 genera (Oomycota, Peronosporaceae) that cause downy mildew diseases. In 2001, Dick hypothesized that diversification of downy mildew species was driven in part by host plant ...
William J. Davis, Jo Anne Crouch
doaj   +1 more source

High Genetic Diversity and Low Differentiation of Michelia coriacea (Magnoliaceae), a Critically Endangered Endemic in Southeast Yunnan, China [PDF]

open access: yes, 2012
Michelia coriacea, a critically endangered tree, has a restricted and fragmented distribution in Southeast Yunnan Province, China. The genetic diversity, genetic structure and gene flow in the three extant populations of this species were detected by 10 ...
Archak   +54 more
core   +3 more sources

Genetic draft, selective interference, and population genetics of rapid adaptation [PDF]

open access: yes, 2013
To learn about the past from a sample of genomic sequences, one needs to understand how evolutionary processes shape genetic diversity. Most population genetic inference is based on frameworks assuming adaptive evolution is rare.
Neher, Richard A.
core   +1 more source

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