Genetical evidences supporting the hypothesis that P cytotype can be determined solely with some species of incomplete P elements

支持 P 细胞型可以仅通过某些不完整 P 元件物种来确定这一假设的遗传学证据

• 批准号: 61540461
• 负责人: CHIGUSA Sadao Ishiwa
• 金额: $ 1.22万
• 依托单位: Ochnomizu University
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for General Scientific Research (C)
• 财政年份: 1986
• 资助国家: 日本
• 起止时间: 1986 至 1987
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-61540461/
• 关键词: Hybrid dysgenesis; P-M system; P cytotype determination; 不完全型P因子; 転位酵素; ハイブリッド・ディスジェネシス; 小笠原父島; P因子抑制機構; 可動因子; Pサイトタイプ,リプレッサー

Many inbred and isofemale lines derived from wild populations of Drosophila melanogaster were tested for gonadal dysgenic sterility, male recombination and sn<omega> secondary mutation. Among them, we have found strains whose dysgenic offspring show negligible sterility, and undetectable male recombination and sn<^(omega) mutation. They can be considered to be neutral strains in the strict sense. Such neutral strains appear to carry only defective P elements in their genomes. Taking the observations of Karess & Rubin (1984) into account, it is suggested that some defective P elements retain the function necessary for P cytotype. Cytotype determination mechanisms are discussed.

对黑腹果蝇野生种群的许多自交系和同雌系进行了性腺发育异常不育、雄性重组和sn<omega>二次突变的检测。在这些菌株中，我们已经发现其基因异常后代显示出可忽略的不育性，以及不可检测的雄性重组和sn ω（ω）突变。严格意义上来说，它们可以被认为是中性菌株。这些中性菌株似乎在其基因组中仅携带有缺陷的P元件。考虑到Karess &amp; Rubin（1984）的观察，我们认为某些缺陷的P元件保留了P细胞型所必需的功能。细胞型确定机制进行了讨论。

项目成果

村井美代,石和貞男: 40. 76-87 (1986)

村井美代、石泽贞夫：40. 76-87 (1986)