Dairy cattle have been subjected to more than 60 years of intense selection for traits to enhance milk production [ 1– 4].
Extensive use of artificial insemination (about half of births), associated with intense selection for traits related to meat production, contracts the effective population size (Ne ~60), thereby causing frequent outbursts of recessive defects.
It is also unclear whether this continuum should be extended to include the possession of isolated "autistic traits"—peculiar, intense preoccupations and fixations, often combined with relative social withdrawal or remoteness such as one encounters in any number of people conventionally called "normal," or seen, at most, as a little odd, eccentric, pedantic, or reclusive.
It is also unclear whether this continuum should be extended to include the possession of isolated "autistic traits" — peculiar, intense preoccupations and fixations, often combined with relative social withdrawal or remoteness — such as one encounters in any number of people conventionally called "normal," or seen, at most, as a little odd, eccentric, pedantic, or reclusive.
Anthropogenic disturbances can lead to intense selection pressures on traits and very rapid evolutionary changes.
Comparative sequence analysis revealed conserved blocks containing homoloeogous QTL for important seed quality traits under intense artificial selection.
The scientific community has ranged the gamut from intense interest in UV traits (Bennett and Cuthill, 1994), to discounting what was considered exaggerated attention and promoting the idea that UV is not a special channel for communication (e.g. Chittka et al., 1994).
Its low variation could be explained because intense selection on this trait due to its importance in determining reproductive success [9] may result in uniformly high values [31].
For gamete breeding values for the direct genetic effect for stillbirth, there was no genetic trend for either maternal or paternal haplotype breeding values because the direct genetic effect for stillbirth does not seem to be a trait under intense selection.
Hallmarks of the H. erectus skeleton such as long legs, a narrow flexible waist, and short forearms seem to be adaptations for such intense endurance activity, and these traits appear before the invention of sophisticated projectile hunting weapons (Bramble and Lieberman 2004; Lieberman et al. 2009).
