Y-chromosome haplotypes are associated with variation in size and age at maturity in male Chinook salmon.

ABSTRACT: Variation in size and age at maturity is an important component of life history that is influenced by both environmental and genetic factors. In salmonids, large size confers a direct reproductive advantage through increased fecundity and egg quality in females, while larger males gain a reproductive advantage by monopolizing access to females. In addition, variation in size and age at maturity in males can be associated with different reproductive strategies; younger smaller males may gain reproductive success by sneaking among mating pairs. In both sexes, there is a trade-off between older age and increased reproductive success and increased risk of mortality by delaying reproduction. We identified four Y-chromosome haplogroups that showed regional- and population-specific variation in f

SUBMITTER: McKinney GJ 

PROVIDER: S-EPMC7691470 | biostudies-literature | 2020 Dec

REPOSITORIES: biostudies-literature