HIGH TEMPERATURES REVEAL CRYPTIC GENETIC VARIATION IN A POLYMORPHIC FEMALE SPERM STORAGE ORGAN
HIGH TEMPERATURES REVEAL CRYPTIC GENETIC VARIATION IN A POLYMORPHIC FEMALE SPERM STORAGE ORGAN
复制标题
DOI：
10.1111/j.1558-5646.2011.01392.x
复制
发表时间：
2011-10-01
期刊：
影响因子：
3.3
通讯作者：
Schaefer, Martin Andreas
中科院分区：
文献类型：
--
作者：
Berger, David;Bauerfeind, Stephanie Sandra;Schaefer, Martin Andreas
雌性生殖形态的变异可能通过影响替代雄性表型的相对受精成功率在生殖隔离中起决定性作用。然而，环境变化如何影响雌性生殖道的发育，从而改变交配后性选择的竞技场的知识是有限的。黄粪蝇女性拥有三个或四个精子存储隔间，多态性与记录精子优先的影响。我们进行了数量遗传学研究，包括12个种群饲养在三个发展温度补充广泛的领域数据表明，温暖的发展温度增加的频率女性与四个隔间，揭示了显着隐藏的遗传变异的多态性。系统的遗传分化的生长速度和受精囊数量沿着纬度，和表型之间的性状在温度处理的协方差表明，遗传结构的多态性是通过选择代谢率。我们的研究结果说明了如何温度可以调节性选择的先决条件，通过差异暴露在生殖形态的新变化。这意味着环境的变化可能会大大改变性选择的动态。我们进一步讨论了温度依赖的发育可塑性可能有助于观察到的受精囊形态的快速进化转变。
Variation in female reproductive morphology may play a decisive role in reproductive isolation by affecting the relative fertilization success of alternative male phenotypes. Yet, knowledge of how environmental variation may influence the development of the female reproductive tract and thus alter the arena of postcopulatory sexual selection is limited. Yellow dung fly females possess either three or four sperm storage compartments, a polymorphism with documented influence on sperm precedence. We performed a quantitative genetics study including 12 populations reared at three developmental temperatures complemented by extensive field data to show that warm developmental temperatures increase the frequency of females with four compartments, revealing striking hidden genetic variation for the polymorphism. Systematic genetic differentiation in growth rate and spermathecal number along latitude, and phenotypic covariance between the traits across temperature treatments suggest that the genetic architecture underlying the polymorphism is shaped by selection on metabolic rate. Our findings illustrate how temperature can modulate the preconditions for sexual selection by differentially exposing novel variation in reproductive morphology. This implies that environmental change may substantially alter the dynamics of sexual selection. We further discuss how temperature-dependent developmental plasticity may have contributed to observed rapid evolutionary transitions in spermathecal morphology.