银额果蝇的B染色体研究——1.昆明群体的B_s数目和频率  

THE STUDY OF B CHROMOSOMES IN Drosophila albomicans 1. THE NUMBER AND FREQUENCY OF Bs IN KUNMING POPULATION

作　　者：凌发瑶[1] 北川修 

机构地区：[1]中国科学院昆明动物研究所 [2]日本国东京都立大学理学部

出　　处：《Zoological Research》1991年第1期93-98,共6页动物学研究（英文）

基　　金：日本国文部省国际学术研究基金(No.63043060;代表者北川修)

摘　　要：本研究发现银额果蝇昆明群体有丝分裂中期核型中存在B染色体,出现频率为69.1％。目前,在已研究过的来自各个地区的银额果蝇中,昆明群体的B染色体频率最高。B染色体数目为1—6条。该群体内单雌系间的B染色体数目不同,个体间和细胞间的B染色体数目也不同。在核型中,B染色体最小,形态稳定,点状,C-带和G-带呈阳性。In this study, mitotic metaphase of Drosophila albomicans with B-chro-mosomes were found in Kunming population. Their frequency of presence of B-chromosomes were 69.1%. At present, among D. albomicans has been studied from several localities, the frequency of B-chromosomes of Kunming population were the hightest. The number of B-chromosomes varied from 1 to 6 and differed between each iso-femals line of them as well as that of between individuals and cells. All the B-chromosomes were the smallest, dot-shaped of the karyotype. Both C-band and G-band staining are positive for B-chromosomes.

关 键 词：银额果蝇 昆明群体 B染色体 

分 类 号：Q969.462.2[生物学—昆虫学]