Antler size in red deer: Heritability and selection but no evolution

被引:392
作者
Kruuk, LEB
Slate, J
Pemberton, JM
Brotherstone, S
Guinness, F
Clutton-Brock, T
机构
[1] Univ Edinburgh, Inst Cell Anim & Populat Biol, Edinburgh EH9 3JT, Midlothian, Scotland
[2] Univ Cambridge, Dept Zool, Cambridge CB2 3EJ, England
关键词
additive genetic variance; animal model; breeding values; Cervus elaphus; population density; sexual selection;
D O I
10.1111/j.0014-3820.2002.tb01480.x
中图分类号
Q14 [生态学(生物生态学)];
学科分类号
071012 ; 0713 ;
摘要
We present estimates of the selection on and the heritability of a male secondary sexual weapon in a wild population: antler size in red deer. Male red deer with large antlers had increased lifetime breeding success, both before and after correcting for body size, generating a standardized selection gradient of 0.44 (+/-0.18 SE). Despite substantial age- and environment-related variation, antler size was also heritable (heritability of antler mass = 0.33 +/- 0.12). However the observed selection did not generate an evolutionary response in antler size over the study period of nearly 30 years, and there was no evidence of a positive genetic correlation between antler size and fitness nor of a positive association between breeding values for antler size and fitness. Our results are consistent with the hypothesis that a heritable trait under directional selection will not evolve if associations between the measured trait and fitness are determined by environmental covariances: In red deer males, for example, both antler size and success in the fights for mates may be heavily dependent on an individual's nutritional state.
引用
收藏
页码:1683 / 1695
页数:13
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