Unexpectedly, in the course of breeding to a different genetic background we found one sub-strain of TRAP over expressing mice that presented an early onset obesity that did not seem to be due to apparent over-eating.
During the course of breeding the heterozygous recombinants, mice that were B6 at all genotyping markers were also generated.
Segregation at major effect QTL underlying grain yield in rye is not expected as any large-effect QTL would have been long fixed in the course of breeding.
For males, the proportion of stack calls was lower than for females and showed less prominent differences between breeding stages: there was a decrease over the course of the breeding stages.
In fact, as far back as the late-1970s, correlandvexperimentalmental studies have repeatedly shown that reproductive success declines over the course of the breeding season in a variety of avian species, translating into strong directional selection for early breeding (review in Verhulst and Nilsson 2008).
Pre-nesting densities in late April early May were highest in autumn sown cereals and other arable land use with vegetation, but decreased during the course of the breeding season such that densities in spring sown cereals were slightly higher than those in autumn sown cereals late in the season.
Out of approximately 75 nests on which APRs have been mounted over the course of two breeding seasons, in two different locations, the presence of an APR has never caused a pair to abandon their nest.
We found seasonal effects on some parameters: The proportion of whoots decreased over the course of the breeding season in reactive singing (general linear model, F1,20 = 6.25, R = 0.24, t = −2.5, p = 0.02).
Of course, smaller males without much hope of breeding on land would also benefit from the at-sea mating alternative, which clarifies why up to 75% of adult males skip the breeding colony each year, as earlier studies have shown.
Then of course I entered into the real world, because in the real world of breeding horses, you don't always get what you want.
Even after they were domesticated, turkeys remained spirited, traditionally spending the bulk of their lives outdoors, exploring, climbing trees, socializing and, of course, breeding.
