Social effects for locomotion vary between environments in Drosophila melanogaster females

Despite strong purifying or directional selection, variation is ubiquitous in populations. One mechanism for the maintenance of variation is indirect genetic effects, as the fitness of a given genotype will depend somewhat on the genes of its social partners. Indirect genetic effects (IGEs) describe the effect of genes in social partners on the expression of the phenotype of a focal individual. Here we ask what effect IGEs, and variation in IGEs between abiotic environments, has on locomotion in Drosophila. This trait is known to be subject to intralocus sexually antagonistic selection. We estimate the coefficient of interaction, Ψ, using six inbred lines of Drosophila. We found that Ψ varied between abiotic environments, and that it may vary across among male genotypes in an abiotic environment specific manner. We also found evidence that social effects of males alter the value of a sexually dimorphic trait in females, highlighting an interesting avenue for future research into sexual...尽管存在强烈的净化选择或定向选择，种群内的遗传变异仍普遍存在。维持遗传变异的一种机制是间接遗传效应（indirect genetic effects, IGEs），因为特定基因型的适合度在一定程度上取决于其社会伙伴的基因。间接遗传效应（IGEs）指的是社会伙伴体内的基因对焦点个体的表型表达所产生的影响。本研究旨在探究IGEs以及非生物环境间的IGEs变异对果蝇（Drosophila）运动能力的影响。该性状已知受到座内性拮抗选择的作用。我们利用6个果蝇近交系估算了互作系数Ψ。研究发现，Ψ在不同非生物环境间存在差异，且其可能以非生物环境特异性的方式在雄性基因型间存在变异。本研究还发现，雄性的社会效应会改变雌性的性二态性状的数值，这为后续的性...研究指明了颇具价值的方向。