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白颊长臂猿染色体的研究
引用本文:刘瑞清,佴文惠.白颊长臂猿染色体的研究[J].动物学研究,1996,17(3):341-346.
作者姓名:刘瑞清  佴文惠
作者单位: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
摘    要:本文对我国云南南部的白须长臂猿(H.leucogenys)染色体的G带、C带、晚复制带及Ag-NORs进行了较为详细的研究。它的2n=52,核型公式为44(M或SM)+6(A),XY(M,A)。C带表明一些染色体着丝点C带弱化;有的染色体出现插入的和端位的C带;X染色体两臂有端位C带,Y染色体是C带阳性和晚复制的。Ag-NORs的数目,雌体有4个,雄体有5个,Y染色体上具NOR。本文对白颊长臂猿与其它长臂猿间的亲缘关系、核型进化的可能途径进行了讨论。

关 键 词:白颊长臂猿  染色体  灵长目

A STUDY ON THE CHROMOSOMES OF WHITE-CHEEKED GIBBON(Hylobates leucogenys)
Liu Ruiqing, Nai Wenhui, Chen Yuze,Yu Dinghui.A STUDY ON THE CHROMOSOMES OF WHITE-CHEEKED GIBBON(Hylobates leucogenys)[J].Zoological Research,1996,17(3):341-346.
Authors:Liu Ruiqing  Nai Wenhui  Chen Yuze  Yu Dinghui
Abstract:White-cheeked gibbon(H. leucogenys) is distributed in the south of Yunnan, China.The chromosomes of a female and a male were studied by several banding techniques(G-,C -and Ag-staining), and a techniqe for simultaneous exhibiting chromosome replication patterns and late replicating Y chromosome. The diploid chromosome number is 52. There are 22 pairs of metacentrlcs or submetacentrics (No. 1-22); 3 pairs of acrocentrics(Nos. 23-25), and chromosomes Nos. 23-24 with a secondary constriction near the centromere on the short arm.The X chromosome is a large metacentric, and the Y, the smallest acrocentric. Its karyotype for mula is 44(M or SM)+ 6(A), XY(M, A). The centrimeric distribution of heterochromatin has been demonstrated in some chromosomes. In addion, there are 3 kinds of heterochromatin on the chromosomes:(1) ab sent of centromeric heterochromatin,(2) interstitial heterochromatin,(3) terminal heterochromatin.Interstitial heterochromatin has been observed on the blarm of X chromosome. Y chromosome is completely C-band positive. Silver staining revealed 5 chromosomes with NORs in the male specimen.4 Ag-NORs of theth are heated on the secondary constriction of chromosomes 23 and 24 respectivly,and one of them is located on the Y chromosome which has been confirmed by Fluorescence in situ hybridization(FISH) in the same cell. There are 4 chromosomes with Ag-NORs in the female specimen,and they are also located on the secondary constriction of chromosomes 23 and 24. Moreover,the association of Ag-NORs have been observed. Base on the above results,the relationship in gibbons and the way of chromosome evo lution in the genus Hylobates have been discussed.
Keywords:H  leucogencys  Banding patterns of chromosome    Yunnan  
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