Negative genetic correlation between male sexual attractiveness and survival.

摘要: [Extract] Indirect selection of female mating preferences may result from a genetic association between male attractiveness and offspring fitness1, 2. The attractive males have enhanced growth3, 4, 5, fecundity3, viability5, 6, 7, 8 or attractiveness4, 9, 10, 11. However, the extent to which bear genes that reduce other fitness components has remained unexplored. Here I show sexual in guppies (Poecilia reticulata) is heritable genetically correlated with ornamentation. Like ornamentation12, 13, 14, be substantially Y-linked. benefit males, thus having sons, opposed by strong negative correlation both survival number sons maturing. Such correlations suggest either antagonistic pleiotropy linkage disequilibrium deleterious alleles. presence many colour pattern on near non-recombining section Y chromosome facilitate accumulation mutations hitch-hiking15, 16. These findings enhancing associated pleiotropic costs heavy mutational loads.