期刊
MOLECULAR ECOLOGY RESOURCES
卷 15, 期 1, 页码 107-116出版社
WILEY
DOI: 10.1111/1755-0998.12287
关键词
black brant (Branta bernicla nigricans); cervus; conspecific brood parasitism; extra-pair paternity; intraspecific brood parasitism; parentage analysis
资金
- National Science Foundation [OPP 9214970, DEB 9815383, OPP 9985931, OPP 0196406]
- Nevada Agricultural Experiment Station
- Ducks Unlimited
- Black Brant Group
- Sigma Xi
- Dennis G. Raveling Endowment at the University of California Davis
- Direct For Biological Sciences
- Division Of Environmental Biology [1252656] Funding Source: National Science Foundation
Genotypes are frequently used to assess alternative reproductive strategies such as extra-pair paternity and conspecific brood parasitism in wild populations. However, such analyses are vulnerable to genotyping error or molecular artefacts that can bias results. For example, when using multilocus microsatellite data, a mismatch at a single locus, suggesting the offspring was not directly related to its putative parents, can occur quite commonly even when the offspring is truly related. Some recent studies have advocated an ad-hoc rule that offspring must differ at more than one locus in order to conclude that they are not directly related. While this reduces the frequency with which true offspring are identified as not directly related young, it also introduces bias in the opposite direction, wherein not directly related young are categorized as true offspring. More importantly, it ignores the additional information on allele frequencies which would reduce overall bias. In this study, we present a novel technique for assessing extra-pair paternity and conspecific brood parasitism using a likelihood-based approach in a new version of program cervus. We test the suitability of the technique by applying it to a simulated data set and then present an example to demonstrate its influence on the estimation of alternative reproductive strategies.
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