ESTIMATION OF PARAMETERS OF INBREEDING AND GENETIC DRIFT IN POPULATIONS WITH OVERLAPPING GENERATIONS

被引:52
作者
Wang, Jinliang [1 ]
Brekke, Patricia [1 ]
Huchard, Elise [2 ]
Knapp, Leslie A. [3 ]
Cowlishaw, Guy [1 ]
机构
[1] Zool Soc London, Inst Zool, London NW1 4RY, England
[2] Univ Montpellier 2, Inst Sci Evolut, CNRS, F-34095 Montpellier 5, France
[3] Univ Cambridge, Dept Biol Anthropol, Cambridge CB2 3DZ, England
基金
英国生物技术与生命科学研究理事会;
关键词
Effective population size; generation interval; genetic markers; overlapping generations; parentage assignments; EFFECTIVE SIZE; EFFECTIVE NUMBER; REPRODUCTIVE SUCCESS; HETEROZYGOTE-EXCESS; LIFE-HISTORY; INFERENCE; SELECTION; POLYMORPHISM; EVOLUTION; PARENTAGE;
D O I
10.1111/j.1558-5646.2010.00953.x
中图分类号
Q14 [生态学(生物生态学)];
学科分类号
071012 ; 0713 ;
摘要
Many long-lived plant and animal species have nondiscrete overlapping generations. Although numerous models have been developed to predict the effective sizes (N-e) of populations with overlapping generations, they are extremely difficult to apply to natural populations because of the large array of unknown and elusive life-table parameters involved. Unfortunately, little work has been done to estimate the N-e of populations with overlapping generations from marker data, in sharp contrast to the situation of populations with discrete generations for which quite a few estimators are available. In this study, we propose an estimator (EPA, estimator by parentage assignments) of the current N-e of populations with overlapping generations, using the sex, age, and multilocus genotype information of a single sample of individuals taken at random from the population. Simulations show that EPA provides unbiased and accurate estimates of N-e under realistic sampling and genotyping effort. Additionally, it yields estimates of other interesting parameters such as generation interval, the variances and covariances of lifetime family size, effective number of breeders of each age class, and life-table variables. Data from wild populations of baboons and hihi (stitchbird) were analyzed by EPA to demonstrate the use of the estimator in practical sampling and genotyping situations.
引用
收藏
页码:1704 / 1718
页数:15
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