Heritability of the timing of autumn migration in a natural bird population
Heritability of the timing of autumn migration in a natural bird population
复制标题
自然鸟类秋季迁徙时间的遗传力
DOI：
10.1098/rspb.2001.1602
复制
发表时间：
2001
期刊：
影响因子：
--
通讯作者：
U. Querner
中科院分区：
文献类型：
--
作者：
Francisco Pulido;P. Berthold;G. Mohr;U. Querner
近几十年来，全球气温以前所未有的速度上升。这导致了环境的快速变化，改变了决定鸟类年度组织的选择制度。为了评估秋季迁徙时间适应性进化的潜力，我们估计了德国南部黑帽（Sylvia atricapilla）种群迁徙活动开始的遗传力。当用不同方法估计时，遗传力（h2 = 0.34-0.45）和加性遗传变异系数（CV2 = 4.7-5.7）是显着且一致的，无论它们是来自野外孵化还是圈养繁殖的鸟类。在人工选择实验中，我们选择了较晚开始的迁徙活动，模拟对此性状的预期自然选择。经过两代选择后，我们发现迁徙活动的平均开始时间显着延迟了一周以上。已实现的遗传力 (h2 = 0.55) 与选择系所源自的队列中的预期遗传力一致。我们的结果表明，秋季迁徙时间的进化变化可能会在很短的时间内发生，并且很可能不受加性遗传变异缺乏的限制。
In recent decades, global temperature has increased at an unprecedented rate. This has been causing rapid environmental shifts that have altered the selective regimes determining the annual organization of birds. In order to assess the potential for adaptive evolution in the timing of autumn migration, we estimated heritabilities of the onset of migratory activity in a southern German blackcap (Sylvia atricapilla) population. Heritabilities (h2 = 0.34-0.45) and coefficients of additive genetic variation (CV2 = 4.7-5.7) were significant and consistent when estimated by different methods, irrespective of whether they were derived from birds hatched in the wild or bred in captivity. In an artificial selection experiment, we selected for later onset of migratory activity, simulating expected natural selection on this trait. We obtained a significant delay in the mean onset of migratory activity by more than one week after two generations of selection. Realized heritability (h2 = 0.55) was in agreement with expected heritability in the cohort that the selection line was derived from. Our results suggest that evolutionary changes in the timing of autumn migration may take place over a very short time period and will most probably be unconstrained by the lack of additive genetic variation.
影响因子：
3.3
作者：
D. Houle
通讯作者：
D. Houle