Theory shows how sexual selection can exaggerate male traits beyond naturally selected optima and also how natural selection can ultimately halt trait elaboration. Empirical evidence supports this theory, but to our knowledge, there have been no experime
Here, I report on a field study of the common morning glory Ipomoea purpurea, which provided measurements of natural selection on both initial and maternal seed size. For initial seed size, selection favored larger seeds, but a greenhouse study indicated no genetic variation for this trait. For...
Sexual selection often leads to sexual dimorphism, where secondary sexual traits are more expressed in the male sex. This may be due, for example, to increased fighting or mate-guarding abilities of males expressing those traits. We investigated sexually dimorphic traits in four populations of a ...
We used extensive data from a long-term study of great tits ( Parus major ) in the United Kingdom and Netherlands to better understand how genetic signatures of selection translate into variation in fitness and phenotypes. We found that genomic regions under differential selection contained candidate...
Sexual selection and natural selection 来自 ResearchGate 喜欢 0 阅读量: 46 作者: E Mayr 摘要: What characters are due to sexual selection? - male ornaments and attractants - female discrimination Prerequisites for the functioning of sexual selection - a surplus of males - struggle among males ...
The degree and the duration of sexual colour differences vary greatly across lineages, and we do not detect phylogenetic signal in the distribution of this trait, therefore frogs provide an opportunity to investigate the roles of natural and sexual selection across multiple independent derivations of ...
Natural Selection, Childrearing, and the Ethics of Marriage (and Divorce): Building a Case for the Neuroenhancement of Human RelationshipsSPECIAL ISSUE Open access Published: 05 July 2012 Volume 25, pages 561–587, (2012) Cite this article ...
Testing natural selection vs. genetic drift in phenotypic evolution using quantitative trait... Provides information on a study which used trait locus data to analyze natural selection and random genetic drift. Discussion on the usage of quantitative ... Orr,H.,Allen - 《Genetics》 被引量: 163...
A departure from random mating as a consequence of factors such as inbreeding, overlapping generations, finite population size and geographical subdivision. SELECTIVE SWEEP The process by which positive selection for a mutation eliminates neutral variation at linked sites. ...
In goat breeds, the domestication followed by artificial selection for economically important traits have shaped genetic variation within populations, leading to the fixation of specific alleles for specific traits. This led to the formation and evolution of many different breeds specialised and raised fo...