Does genetic diversity reduce sibling competition

摘要: An enduring hypothesis for the proximal benefits of sex is that recombination increases genetic variation among offspring and this performance. A corollary mothers mate multiply increase within a clutch gain due to diversity alone. Many studies have demonstrated multiple mating can performance, but most attribute sexual selection role has received less attention. Here, we used breeding design generate populations full-siblings, half-siblings, unrelated individuals solitary ascidian Ciona intestinalis. Importantly, preclude potentially confounding influences maternal effects selection. We found in with greater had performance (metamorphic success, postmetamorphic survival, size) than lower diversity. Furthermore, show by males thereby increasing single offspring, females indirect fitness absence mate-choice. Our results when siblings are likely interact, decrease competition resources substantial generation.