Spawning, copulation and inbreeding coefficients in marine invertebrates

被引:106
作者
Addison, JA
Hart, MW [1 ]
机构
[1] Dalhousie Univ, Dept Biol, Halifax, NS B3H 4J1, Canada
[2] Univ Calif Santa Cruz, Dept Ecol & Evolutionary Biol, Santa Cruz, CA 95604 USA
[3] Simon Fraser Univ, Dept Biol Sci, Burnaby, BC V5A 1S6, Canada
关键词
F-IS; Wahlund effect; fertilization; population genetics;
D O I
10.1098/rsbl.2005.0353
中图分类号
Q [生物科学];
学科分类号
07 ; 0710 ; 09 ;
摘要
Patterns of population genetic variation have frequently been understood as consequences of life history covariates such as dispersal ability and breeding systems (e.g. selfing). For example, marine invertebrates show enormous variation in life history traits that are correlated with the extent of gene flow between populations and the magnitude of differentiation among populations at neutral genetic markers (F-ST). Here we document an unexpected correlation between marine invertebrate life histories and deviation from Hardy-Weinberg equilibrium (non-zero values of F-IS, the inbreeding coefficient). F-IS values were significantly higher in studies of species with free-spawned planktonic sperm than in studies of species that copulate or have some form of direct sperm transfer to females or benthic egg masses. This result was robust to several different analytical approaches. We note several mechanisms that might contribute to this pattern, and appeal for more studies and ideas that might help to explain our observations.
引用
收藏
页码:450 / 453
页数:4
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