Recombination within the Cepaea nemoralis supergene is confounded by incomplete penetrance and epistasis

Recombination within the Cepaea nemoralis supergene is confounded by incomplete penetrance and epistasis
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Cepaea nemoralis超基因内的重组因不完全外显率和上位性而混淆

DOI:
10.1101/472456
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发表时间:
2018
期刊:
--
影响因子:
--
通讯作者:
Gonzalez D
Gonzalez D
中科院分区:
--
文献类型:
--
作者:
Gonzalez D

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虽然陆地蜗牛Cepaea nemoralis是最彻底的调查颜色多态性物种之一,有一些最近的研究,对壳性状的遗传。以前,它已被证明,壳的多态性是由一系列的9个或更多的基因座,其中5个使一个单一的“超基因”包含紧密连锁的颜色和带位点和更松散的连锁色素沉着,扩散带和点状位点。然而,早期工作的一个局限性是,超基因内基因座之间重组的假定实例不容易验证。因此,我们生成了一组新的C。颜色、条带和色素沉着分离的nemoraliscrosses,以及其他几个非连锁的壳表型基因座。使用位于超基因侧翼的一组RAD-seq衍生的基因座对蜗牛进行基因分型,并通过将推断的超基因基因型与RAD标记基因型进行比较来测试重组的情况。我们没有发现任何证据表明疑似“重组”个体是超基因内基因座之间的重组。由于点估计的重组之间的颜色/带,和颜色/色素沉着位点为零,不完全的遗传和上位性是一个更好的解释,一些蜗牛壳的明显的“重组”表型。因此,总的来说,这项工作表明,超基因的结构可能并不像以前假设的那样。它也提供了一个资源,精细定位的超基因和其他主要壳表型基因座。
Although the land snailCepaea nemoralisis one of the most thoroughly investigated colour polymorphic species, there have been few recent studies on the inheritance of the shell traits. Previously, it has been shown that the shell polymorphism is controlled by a series of nine or more loci, of which five make a single ‘supergene’ containing tightly linked colour and banding loci and more loosely linked pigmentation, spread band and punctate loci. However, one limitation of earlier work was that putative instances of recombination between loci within the supergene were not easily verified. We therefore generated a new set ofC. nemoraliscrosses that segregate for colour, banding and pigmentation, and several other unlinked shell phenotype loci. The snails were genotyped using a set of RAD-seq-derived loci that flank the supergene, and instances of recombination tested by comparing inferred supergene genotype against RAD-marker genotype. We found no evidence that suspected ‘recombinant’ individuals are recombinant between loci within the supergene. As point estimates of recombination between both colour/banding, and colour/pigmentation loci are zero, incomplete penetrance and epistasis are a better explanation for the apparent ‘recombinant’ phenotype of some snail shells. Overall, this work, therefore, shows that the architecture of the supergene may not be as previously supposed. It also provides a resource for fine mapping of the supergene and other major shell phenotype loci.
DOI: --
发表时间: 1969
期刊: Genetica
影响因子: 1.5
作者:
H. Wolda
通讯作者: H. Wolda
软体动物贝壳多态性颜色和图案变异的评分及其遗传基础
DOI: --
发表时间: 1988
期刊:
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作者:
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Cepaea nemoralis (L.) 一些形态和品种的遗传学
DOI: --
发表时间: 1968
期刊:
影响因子: --
作者:
A. Cain;P. Sheppard;J. M. King
通讯作者: J. M. King
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发表时间: 2012
期刊:
影响因子: --
作者:
R. Cameron;L. Cook
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蜗牛 ARIANTA ARBUSTORUM 壳性状多态性遗传学的一些数据。
DOI: --
发表时间: 1966
期刊: Genetics
影响因子: 3.3
作者:
L. M. Cook;J. M. King
通讯作者: J. M. King