Genetic variation segregating in natural populations of Tribolium castaneum affecting traits observed in hybrids with T. freemani.
Genetic variation segregating in natural populations of Tribolium castaneum affecting traits observed in hybrids with T. freemani.
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赤拟谷盗自然种群中遗传变异的分离影响了与弗里曼拟谷盗杂交种中观察到的性状。
DOI：
10.1093/genetics/147.3.1235
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发表时间：
1997
期刊：
影响因子：
3.3
通讯作者：
McNaughton,M
中科院分区：
文献类型：
--
作者：
Wade,MJ;Johnson,NA;Jones,R;Siguel,V;McNaughton,M
本文研究了赤拟谷盗Tribolium castaneum和赤拟谷盗T. freemani的四个自然居群间存在遗传分离。在这些人群中，对于一些杂交性状，我们观察到750公里以外的种群之间的差异与不同大陆上的种群之间的差异一样多，这表明在当地范围内存在遗传分化。在自然群体中，公畜之间的分离的变化是大于在早期的研究中发现的远交实验室人口和可比的近交系之间观察到的来自远交的股票由8代兄弟姐妹交配。当从T. castaneumare交配同种和异种的女性，我们没有观察到一个显着的相关性，在家庭的平均水平之间的种内和种间的表型，这表明独立的杂交性状从可比性状的物种。我们讨论了我们的研究结果有关物种形成的进化遗传学和种间杂交中上位性遗传变异的表达。
We investigated patterns of within-species genetic variation for traits observed in hybrids (hybrid numbers, hybrid sex ratios, and hybrid male deformities) between two species of flour beetles,Tribolium castaneumandT. freemani.We found genetic variation segregating among four natural populations ofT. castaneumas well as within these populations. For some hybrid traits, we observed as much variation among populations 750 km apart as between populations on different continents, suggesting genetic differentiation at a local scale. Within natural populations, the variation segregating among sires is greater than that found in an earlier study for an outbred laboratory population and comparable to that observed between inbred lines derived from the outbred stock by eight generations of brother-sister mating. When sires fromT. castaneumare mated to conspecific and heterospecific females, we do not observe a significant correlation at the level of the family mean between the intraspecific and interspecific phenotypes, suggesting the independence of the hybrid traits from comparable traits within species. We discuss our findings in relation to the evolutionary genetics of speciation and the expression of epistatic genetic variance in interspecific crosses.
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