Cytonuclear Interactions and the Economics of Mating in Seed Beetles
Cytonuclear Interactions and the Economics of Mating in Seed Beetles
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DOI：
10.1086/653671
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发表时间：
2010-08-01
影响因子：
2.9
通讯作者：
Arnqvist, Goran
中科院分区：
文献类型：
--
作者：
Dowling, Damian K.;Meerupati, Tejashwari;Arnqvist, Goran
最近的研究发现，物种内存在大量的非中性细胞质遗传变异，这表明我们不应该再将细胞质视为进化变化的闲置中介。细胞质基因组的非中性性特别令人感兴趣，因为这些基因组是母系传递的。这意味着任何给定的细胞质遗传突变的命运直接与其在雌性中表达时的表现有关。由于这个原因，有人假设细胞质基因将通过与双亲传递的核基因相互作用的性对抗军备竞赛共同进化。我们评估这一预测，检查的成本和利益的交配在Callosobruchus maculatus女性进行交配治疗与三个类（保持处女，交配一次，或被迫与男性同居）的基因组间的贡献。我们没有发现任何证据表明交配的经济性是由雌性细胞质基因和雄性细胞核基因之间的相互作用决定的，因此，不支持性对抗性基因组间军备竞赛。然而，与雌性交配的成本是由雌性细胞内表达的细胞质和细胞核基因之间的相互作用形成的。因此，细胞核的相互作用被卷入交配的经济学中。
Recent studies have uncovered an abundance of non-neutral cytoplasmic genetic variation within species, which suggests that we should no longer consider the cytoplasm an idle intermediary of evolutionary change. Nonneutrality of cytoplasmic genomes is particularly intriguing, given that these genomes are maternally transmitted. This means that the fate of any given cytoplasmic genetic mutation is directly tied to its performance when expressed in females. For this reason, it has been hypothesized that cytoplasmic genes will coevolve via a sexually antagonistic arms race with the biparentally transmitted nuclear genes with which they interact. We assess this prediction, examining the intergenomic contributions to the costs and benefits of mating in Callosobruchus maculatus females subjected to a mating treatment with three classes (kept virgin, mated once, or forced to cohabit with a male). We find no evidence that the economics of mating are determined by interactions between cytoplasmic genes expressed in females and nuclear genes expressed in males and, therefore, no support for a sexually antagonistic intergenomic arms race. The cost of mating to females was, however, shaped by an interaction between the cytoplasmic and nuclear genes expressed within females. Thus, cytonuclear interactions are embroiled in the economics of mating.