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首页> 外文期刊>Genes & Genetic Systems >Genetic interactions underlying hybrid male sterility in the Drosophila bipectinata species complex
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Genetic interactions underlying hybrid male sterility in the Drosophila bipectinata species complex

机译：果蝇双核果复合体中杂种雄性不育的遗传相互作用

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摘要

Understanding genetic mechanisms underlying hybrid male sterility is one of the most challenging problems in evolutionary biology especially speciation. By using the interspecific hybridization method roles of Y chromosome, Major Hybrid Sterility (MHS) genes and cytoplasm in sterility of hybrid males have been investigated in a promising group, the Drosophila bipectinata species complex that consists of four closely related species: D. pseudoananassae, D. bipectinata, D. parabipectinata and D. malerkotliana. The interspecific introgression analyses show that neither cytoplasm nor MHS genes are involved but X-Y interactions may be playing major role in hybrid male sterility between D. pseudoananassae and the other three species. The results of interspecific introgression analyses also show considerable decrease in the number of males in the backcross offspring and all males have atrophied testes. There is a significant positive correlation between sex - ratio distortion and severity of sterility in backcross males. These findings provide evidence that D. pseudoananassae is remotely related with other three species of the D. bipectinata species complex.
机译：了解杂种雄性不育的遗传机制是进化生物学尤其是物种形成中最具挑战性的问题之一。通过使用Y染色体间种间杂交方法，研究了一个有前途的研究组Drosophila bipectinata种复合体，该复合体由四个密切相关的物种组成：D. pseudoananassae， D. bipectinata，D. parabipectinata和D. malerkotliana。种间渗入分析表明，细胞质和MHS基因均不参与，但X-Y相互作用可能在拟南芥和其他三个物种之间的杂交雄性不育中起主要作用。种间基因渗入分析的结果还表明，回交后代中雄性的数量大大减少，所有雄性的睾丸都萎缩。在回交男性中，性别比畸变与不育严重程度之间存在显着的正相关。这些发现提供了证据，证明假拟南芥与D. bipectinata物种复合体的其他三个物种远缘相关。

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