Causes and consequences of the evolution of reproductive mode in Caenorhabditis nematodes.
Causes and consequences of the evolution of reproductive mode in Caenorhabditis nematodes.
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线虫生殖方式进化的原因和后果。
DOI：
10.1016/j.tig.2012.02.007
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发表时间：
2012
期刊：
影响因子：
--
通讯作者：
Haag,EricS
中科院分区：
文献类型：
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作者：
Thomas,CristelG;Woodruff,GavinC;Haag,EricS
繁殖与使其得以实现的一系列发育和生理机制直接相关，但它的发生方式也会对谱系的遗传学、生态学和长期进化潜力产生影响。在线虫秀丽隐杆线虫中，解剖学上雌性 XX 线虫可以使卵自我受精。这种能力是最近在来自男性-女性祖先的多个线虫谱系中进化出来的，为研究一种新的、趋同进化的生殖模式的发育原因和长期后果提供了一个模型。在这里，我们回顾了最近的工作，这些工作涉及 XX 精子发生进化中的翻译控制，不同的自交谱系同时具有可重复和特殊的特征。我们还讨论了自交的后果，这导致变异的迅速丧失以及自然和性选择对交配相关特征的放松，并可能最终使自交谱系面临更高的灭绝风险。
Reproduction is directly connected to the suite of developmental and physiological mechanisms that enable it, but how it occurs also has consequences for the genetics, ecology and longer term evolutionary potential of a lineage. In the nematodeCaenorhabditis elegans, anatomically female XX worms can self-fertilize their eggs. This ability evolved recently and in multipleCaenorhabditislineages from male–female ancestors, providing a model for examining both the developmental causes and longer term consequences of a novel, convergently evolved reproductive mode. Here, we review recent work that implicates translation control in the evolution of XX spermatogenesis, with different selfing lineages possessing both reproducible and idiosyncratic features. We also discuss the consequences of selfing, which leads to a rapid loss of variation and relaxation of natural and sexual selection on mating-related traits, and may ultimately put selfing lineages at a higher risk of extinction.