Negative effects of individual heterozygosity on reproductive success in a wild bird population.

Molecular Ecology
Esteban Botero-DelgadilloBart Kempenaers

Abstract

The evolutionary consequences of individual genetic diversity are frequently studied by assessing heterozygosity-fitness correlations (HFCs). The prevalence of positive and negative HFCs and the predominance of general versus local effects in wild populations are far from understood, partly because comprehensive studies testing for both inbreeding and outbreeding depression are lacking. We studied a genetically diverse population of blue tits in southern Germany using a genome-wide set of 87 microsatellites to investigate the relationship between proxies of reproductive success and measures of multilocus and single-locus individual heterozygosity (MLH and SLH). We used complimentary measures of MLH and partitioned markers into functional categories according to their position in the blue tit genome. HFCs based on MLH were consistently negative for functional loci, whereas correlations were rather inconsistent for loci found in nonfunctional areas of the genome. Clutch size was the only reproductive variable showing a general effect. We found evidence for local effects for three measures of reproductive success: arrival date at the breeding site, the probability of breeding at the study site and male reproductive success. For th...Continue Reading

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Citations

Dec 6, 2020·The Journal of Heredity·Esteban Botero-DelgadilloBart Kempenaers
Jan 15, 2021·Animals : an Open Access Journal From MDPI·Qianxi FanHaitao Wang

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