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黑腹果蝇的性染色体减数分裂驱动系统I. 具有异染色质缺陷型X染色体(sc-4sc-8)的雄性果蝇中异常的精子细胞发育。

Sex chromosome meiotic drive systems in Drosophila melanogaster I. Abnormal spermatid development in males with a heterochromatin-deficient X chromosome (sc-4sc-8).

作者信息

Peacock W J, Miklos G L, Goodchild D J

出版信息

Genetics. 1975 Apr;79(4):613-34. doi: 10.1093/genetics/79.4.613.

Abstract

The meiotic drive chracteristics of the In(1)sc-4Lsc-8R/Y system have been examined by genetic analysis and by light and electron microscopy. sc-4sc8-/Y males show a direct correlation between nondisjunction frequency and meiotic drive. Temperature-shift experiments reveal that the temperature-sensitive period for nondisjunction is at meiosis, whereas that for meiotic drive has both meiotic and post-meiotic components. Cytological analyses in the light and electron microscopes reveal failures in spermiogenesis in the tests of sc-4sc-8 males. The extent of abnormal spermatid development increases as nondisjunction becomes more extreme.

摘要

通过遗传分析以及光学和电子显微镜技术,对In(1)sc-4Lsc-8R/Y系统的减数分裂驱动特性进行了研究。sc-4sc8-/Y雄性个体的不分离频率与减数分裂驱动之间存在直接关联。温度转换实验表明,不分离的温度敏感期在减数分裂期,而减数分裂驱动的温度敏感期则同时包含减数分裂期和减数分裂后期成分。光学显微镜和电子显微镜下的细胞学分析揭示,sc-4sc-8雄性个体的睾丸中精子发生存在缺陷。随着不分离情况变得更加严重,异常精子细胞发育的程度也会增加。

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