Environment-dependent intralocus sexual conflict in a dioecious plant
Environment-dependent intralocus sexual conflict in a dioecious plant
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DOI：
10.1111/j.1469-8137.2011.03811.x
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发表时间：
2011-01-01
期刊：
影响因子：
9.4
通讯作者：
Bell, Daniela L.
中科院分区：
文献类型：
--
作者：
Delph, Lynda F.;Andicoechea, Jonathan;Bell, Daniela L.
内部性冲突是一种不涉及男性和女性之间直接互动的冲突形式。当选择在具有共同遗传基础的共同特征上在两性之间存在差异时，就会出现这种情况。环境因素，如资源的可利用性，可能会影响这种冲突的表达和进化outcome.We量化的遗传方差-协方差矩阵，G，两种性别的宽叶蝇子草的花和叶性状，以及性别间的矩阵，B。我们还量化的性别选择，通过生存2年在四个自然种群，不同的水availability.Environment-dependent intralocus性冲突存在特定的叶面积，性别之间的遗传相关的特征。男性经历了显着的负选择，但只有在人口相对有限的水供应。女性经历了弱阳性或显着的稳定选择相同的性状。比叶面积与花的大小和数量存在遗传相关性，花的大小和数量在该种中具有性别二型性，叶内性冲突的程度因环境而异。这种冲突的解决很可能是混淆，鉴于特定的叶面积是高度遗传整合与其他性状，也是不同的性别之间。
Intralocus sexual conflict is a form of conflict that does not involve direct interactions between males and females. It arises when selection on a shared trait with a common genetic basis differs between the sexes. Environmental factors, such as resource availability, may influence the expression and evolutionary outcome of such conflict.We quantified the genetic variance-covariance matrix, G, for both sexes of Silene latifolia for floral and leaf traits, as well as the between-sex matrix, B. We also quantified selection on the sexes via survival for 2 yr in four natural populations that varied in water availability.Environment-dependent intralocus sexual conflict exists for specific leaf area, a trait that is genetically correlated between the sexes. Males experienced significant negative selection, but only in populations with relatively limited water availability. Females experienced weakly positive or significant stabilizing selection on the same trait. Specific leaf area is genetically correlated with flower size and number, which are sexually dimorphic in this species.The extent of intralocus sexual conflict varied with the environment. Resolution of such conflict is likely to be confounded, given that specific leaf area is highly genetically integrated with other traits that are also divergent between the sexes.