Results 221 to 230 of about 953,637 (258)

Genetic Variants Underlying Plasticity in Natural Populations of Spadefoot Toads: Environmental Assessment versus Phenotypic Response. [PDF]

Genes (Basel)
Isdaner AJ, Levis NA, Ehrenreich IM, Pfennig DW.   +3 more
europepmc   +1 more source

CRISPR-Cas9 and Cas12a target site richness reflects genomic diversity in natural populations of Anopheles gambiae and Aedes aegypti mosquitoes. [PDF]

BMC Genomics
Collier TC, Lee Y, Mathias DK, López Del Amo V.   +3 more
europepmc   +1 more source

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The Strength of Phenotypic Selection in Natural Populations

American Naturalist, 2001
How strong is phenotypic selection on quantitative traits in the wild? We reviewed the literature from 1984 through 1997 for studies that estimated the strength of linear and quadratic selection in terms of standardized selection gradients or differentials on natural variation in quantitative traits for field populations.
Hopi E Hoekstra, Peter Beerli
exaly   +6 more sources

The evolution of cognition in natural populations

Trends in Cognitive Sciences, 2015
Individual differences in cognitive abilities have been described in a range of species, but do they impact survival or reproduction? Several recent studies report links between putative cognitive and reproductive traits in avian systems. Whether or when selection should occur in the wild is becoming an exciting avenue of research.
Julie, Morand-Ferron, John L, Quinn
openaire   +2 more sources

Measurement of Natural Selection in Natural Populations

Nature, 1964
VAN VALEN1 has proposed a measure of natural selection intensity as an extension of Haldane's2 measure of intensity I and applied this to data on fossil horses. Van Valen's measure, at least in the example given, is actually a special case of Haldane's I.
openaire   +3 more sources

Selection in Natural Populations

1990
The lectures focus on the development of selection component analyses based on population samples including mother-offspring combinations. The need for separation of selection into components is discussed and exemplified by experimental data. The genetic analysis of samples of both simple and complete mother-offspring combinations is developed for one ...
openaire   +2 more sources

Natural selection and population diversity

Journal of Biosocial Science, 1969
It is an observed fact that human populations differ in genetic composition. Some of the inherited diversity is due to combined effects of many genes. Although it would be interesting to know the magnitude and nature of the genetic contribution to some characters under polygenic control, such as intelligence or physique, environmental effects may be so
openaire   +2 more sources

Population genetics and natural selection

Genetica, 1957
Genotypic differences are the raw material on which selection acts but not all kinds of genotypic differences are of equal importance in this connection. FISHER (1930) showed that whether or not mating occurs at random, the population genotypic variance for any quantitative character may be analyzed into a number of components and that one of these ...
openaire   +2 more sources

A potyvirus in nature: indistinct populations

1992
Potyviruses occur in nature as a variable population. A number of strains have been reported for many potyviruses. Two or more viruses have been separated from "one virus" isolate. Experimental isolation and/or transmission often results in atypical viral isolates. A virus may be considered as a fuzzy population. We should properly understand the range
openaire   +2 more sources

Wild epigenetics: insights from epigenetic studies on natural populations

Proceedings of the Royal Society B: Biological Sciences, 2022
Arild Husby
exaly