Suppressor Systems of Segregation Distorter (SD) Chromosomes in Natural Populations of DROSOPHILA MELANOGASTER.
Suppressor Systems of Segregation Distorter (SD) Chromosomes in Natural Populations of DROSOPHILA MELANOGASTER.
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果蝇自然群体中分离扭曲 (SD) 染色体的抑制系统。
DOI：
10.1093/genetics/106.2.279
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发表时间：
1984
期刊：
影响因子：
3.3
通讯作者：
Anita M. Thomas
中科院分区：
文献类型：
--
作者：
Y. Hiraizumi;Anita M. Thomas
对几个自然居群进行了分离扭曲（SD）染色体及其抑制系统存在与否的研究。SD染色体在两个不同年份的独立样本中以百分之几的频率被发现，这些样本来自北卡罗来纳州罗利的一个种群，而在德克萨斯州的几个种群中没有发现SD染色体。在这些地区的人群中发现含有高频率（75%或更高）的抑制X染色体。它们也含有不同程度的部分抑制或不敏感的第二染色体的频率相对较低，但在所有研究的人群中几乎没有完全不敏感的第二染色体。在调查的人群中，抑制X染色体的频率以及部分不敏感或抑制第二染色体的频率是相同的。这表明群体中SD抑制系统的发展可能与SD染色体的存在无关。分离畸变在自然遗传背景中似乎存在，但不同基因型雄性的分离畸变程度不同。在许多情况下，SD染色体显示来自其杂合父本的传播频率小于0.6，在某些情况下甚至小于0.5。在自然种群中存在一种或多种SD的隐性抑制因子。
Several natural populations of D. melanogaster were investigated for the presence (or absence) of the Segregation Distorter ( SD) chromosomes and their suppressor systems. The SD chromosomes were found, at frequencies of a few percent, in two independent samples taken in different years from a Raleigh, North Carolina, population, whereas no SD chromosomes were found in samples collected from several populations in Texas. The populations in these localities were found to contain suppressor X chromosomes in high frequencies (75% or higher). They also contained relatively low frequencies of partial suppressor or insensitive second chromosomes of varying degrees, but completely insensitive second chromosomes were practically absent in all populations examined. The frequencies of suppressor X chromosomes, as well as those of the partially insensitive or suppressor second chromosomes, were the same among the populations investigated. This suggests the possibility that the development of a suppressor system of SD in a population could be independent of the presence of an SD chromosome. Segregation distortion appeared to be occurring in natural genetic backgrounds, but the degree of distortion varied among males of different genotypes. There were many instances in which the SD chromosomes showed transmission frequencies from their heterozygous male parents that were smaller than 0.6 and, in several cases, even smaller than 0.5. The presence of a recessive suppressor, or suppressors, of SD in natural populations was suggested.
德克萨斯州黑腹果蝇自然群体中 T-007 型第二染色体的配子频率。
影响因子：
3.3
作者：
Hiraizumi,Y;Gerstenberg,MV
通讯作者：
Gerstenberg,MV