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首页> 外文期刊>Genetics Research >Abundant genetic variability in Drosophila simulans for hybrid female lethality in interspecific crosses to Drosophila melanogaster.
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Abundant genetic variability in Drosophila simulans for hybrid female lethality in interspecific crosses to Drosophila melanogaster.

机译：果蝇模拟杂种中与果蝇杂交的雌性致死力在果蝇模拟中具有丰富的遗传变异性。

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摘要

Intrinsic postzygotic reproductive isolation is thought to result from the substitution of multiple harmless or beneficial genetic differences between species that are incidentally deleterious when combined in species hybrids, causing hybrid sterility or inviability. Genetic variability for hybrid sterility or inviability phenotypes is, however, rarely assessed in natural populations. Here, we assess variation for Drosophila simulans-encoded maternal factor(s) that cause lethality in D. simulans-Drosophila melanogaster F1 hybrid females. First, we survey genetic variability in the strength of D. simulans-mediated maternal effect hybrid lethality among 37 geographic and laboratory isolates. We find abundant variability in the strength of maternal effect hybrid lethality, ranging from complete lethality to none. Second, we assess maternal effect hybrid lethality for a subset of wild isolates made heterozygous with two so-called hybrid rescue strains. The results suggest that the D. simulans maternal effect hybrid lethality involves a diversity of alleles and/or multiple loci.
机译：认为内源性合子后生殖隔离是由物种间多种无害或有益遗传差异的替代所造成的，这些物种在与物种杂种结合时偶然有害，从而导致杂种不育或不育。然而，在自然种群中很少评估杂种不育或不育表型的遗传变异性。在这里，我们评估果蝇simulans编码的导致 D致死的母亲因素的变异。拟ul-果蝇F 1 杂种雌性。首先，我们调查 D强度的遗传变异性。模拟物介导的37种地理和实验室分离株的母体效应混合杀伤力。我们发现母体效应混合杀伤力的强度存在很大差异，从完全杀伤力到无。其次，我们评估了由两个所谓的杂种拯救株杂合的野生分离株的母体效应杂种杀伤力。结果表明 D。模拟物母体效应混合杀伤力涉及多种等位基因和/或多个基因座。

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