银额果蝇的B染色体研究 2.昆明群体的生活力和B染色体的关系  

THE STUDY OF B CHROMOSOMES IN Drosophila albomicans 2. THE REIATION BETWEEN B CHROMOSOMES ANDTHE VITALITY OF KUNMING POPULATION

作　　者：凌发瑶[1] 施立明[1] 

机构地区：[1]中国科学院昆明动物研究所细胞与分子进化开放研究实验室,650107

出　　处：《Zoological Research》1992年第3期271-275,共5页动物学研究（英文）

摘　　要：本文分析了钮额果蝇的生活力和B染色体的关系。结果表明,银额果蝇的B染色体在其生长和发育过程中具双重性调节作用。一方面,B染色体以单一的形式存在于单雌系核型中,即1B或2Bs,可刺激生长、发育,增强生活力。另一方面,在单雌系的细胞中存在多条B染色体,并形成核型多态性,这似乎对生长和发育又有一定的抑制作用而减弱其生活力。The relation between B chromosomes and the vitality of Drosophila albomicans were analysed. The results showed that B chromosomes of D. albomicans serves two regulated lunctions during growth and development process. Their characters showed that B chromosomes exist inkaryotype of iso-female line as unitary shape, 1B or 2Bs, that stimulate the action of growth and increase the vitality on the one hand, and multiple B chromosomes exist to form the karyotypc polymorphism resulted in restrictive action for growth and development on the other hand.

关 键 词：银额果蝇 B染色体 生长 发育 

分 类 号：Q969.462.1[生物学—昆虫学]