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Genomic analysis reveals depression due to both individual and maternal inbreeding in a freeâliving mammal population
There is ample evidence for inbreeding depression manifested as a reduction in fitness or fitnessârelated traits in the focal individual. In many organisms, fitness is not only affected by genes carried by the individual, but also by genes carried by their parents, for example if receiving parenta...
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Published in: | Molecular ecology 2016, Vol.25 (13), p.3152-3168 |
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Main Authors: | , , , |
Format: | Article |
Language: | English |
Subjects: | |
Online Access: | Get full text |
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Summary: | There is ample evidence for inbreeding depression manifested as a reduction in fitness or fitnessârelated traits in the focal individual. In many organisms, fitness is not only affected by genes carried by the individual, but also by genes carried by their parents, for example if receiving parental care. While maternal effects have been described in many systems, the extent to which inbreeding affects fitness directly through the focal individual, or indirectly through the inbreeding coefficients of its parents, has rarely been examined jointly. The Soay sheep study population is an excellent system in which to test for both effects, as lambs receive extended maternal care. Here, we tested for both maternal and individual inbreeding depression in three fitnessârelated traits (birthweight and weight and hindleg length at 4Â months of age) and three fitness components (firstâyear survival, adult annual survival and annual breeding success), using either pedigreeâderived inbreeding or genomic estimators calculated using |
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ISSN: | 0962-1083 1365-294X |