The Genetics of Some Morphs and Varieties of Cepaea nemoralis (L.)
The Genetics of Some Morphs and Varieties of Cepaea nemoralis (L.)
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Cepaea nemoralis (L.) 一些形态和品种的遗传学
DOI：
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发表时间：
1968
期刊：
影响因子：
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通讯作者：
J. M. King
中科院分区：
文献类型：
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作者：
A. Cain;P. Sheppard;J. M. King
壳色的分型有：淡褐色、淡褐色、淡粉红色、黄白色。淡粉红色对深黄色和浅黄色是显性的，对淡粉红色是隐性的。Murray的发现证实了纯合的透明带基因会使贝壳颜色变淡，并去除唇和带状色素;透明带纯合的淡粉色或黄白色贝壳可能在遗传上是淡粉色或淡粉色。深粉红色透明带存在并将其表型传递给后代;在这些中，苍白效应不明显。没有条带但在与中间条带邻接的位置处有一条带状不透明材料的贝壳在遗传上是中间条带。这种情况是由于色素带的多因素抑制造成的。在五条带形式以及中间带中描述了三条带;它与先前建议的壳色之间的强烈联系得到了证实，但交叉记录。白色唇（有正常色素带）与正常唇隐性，与壳色基因座连锁，与透明带等位。正常唇/白色唇杂合子似乎是苍白的，但苍白的程度是由黄色或粉红色的壳色的存在修改。纯合的白色唇在某些情况下可能会降低壳色的强度，透明带也是如此。透明带被证明是连锁的显带位点，这本身是强烈的联系，为壳的颜色。橙色条纹是与透明带的互补，而不是像默里在Cepaea hortensis中描述的非常相似的lurida形式那样与之等位。var的一种形式。punctata只产生痕迹的带，偶尔一个明确的点状带的描述，这是与壳色位点和显性正常带。这和Lang和Taylor描绘的具有发达的点状条带的形式（其与正常条带的分离得到证实）很可能是等位基因。描述了中灰色至非常苍白身体的分离，中灰色占主导地位。它似乎与壳的颜色、条纹和中带无关。
The following segregants of shell colour are described: pale brown, faint brown, faint pink, yellow-white. Faint pink is dominant to dark and pale yellow and recessive to pale pink. Murray’s finding that the hyalozonate gene when homozygous pales shell colour as well as removing the lip and banding pigment is confirmed; faint pink or yellow-white shells homozygous for hyalozonate may be genetically faint pink or pale pink. Deep pink hyalozonates exist and transmit their phenotype to their offspring; in these the paling effect is not noticeable. Shells with no bands but a strip of fascialbate opaque material in the position for bordering the middle band are genetically mid-banded. The condition is due to a multifactorial suppression of the pigmented band. Spread-banded is described in the five-banded form as well as the m id-banded; the strong linkage between it and shell colour previously suggested is confirmed, but crossovers are recorded. White lip (with normally pigmented bands) is recessive to normal lip, linked to the locus for shell-colour, and allelic to hyalozonate. The normal lip/white lip heterozygote appears to be palelipped, but the degree of pallor is modified by the presence of yellow or pink shell colour. White lip, when homozygous, may reduce the intensity of shell colour in some cases, as does hyalozonate. Hyalozonate is shown to be linked to the banding locus, which itself is strongly linked to that for shell colour. Orange-banded is complementary to hyalozonate, not allelic to it as is the very similar form lurida described by Murray in Cepaea hortensis . A form of the var. punctata producing only traces of bands and occasionally a definite punctate band is described, which is linked to the shell colour locus and dominant to normal bands. This and the form figured by Lang and by Taylor with well-developed punctate bands (the segregation of which from normal bands is confirmed) may well be alleles. A segregation of medium grey to very pale body is described, with medium grey dominant to pale. It appears to be unlinked to shell colour, banding and mid-banded.