黑龙江省产胎生蜥蜴的染色体组型研究  

Analysis on Karyotype of Larcerta vivipara from Heilongjiang Province

作　　者：赵文阁[1] 夏玉国[1] 刘琳琳[1] 赵风[1] 谢志刚[1] 

机构地区：[1]哈尔滨师范大学生命与环境科学学院生物学系,哈尔滨150025

出　　处：《四川动物》2006年第2期234-237,共4页Sichuan Journal of Zoology

基　　金：黑龙江省教育厅科学技术研究项目;黑龙江省研究生创新科研资金项目

摘　　要：本文采用骨髓细胞制片法对分布在黑龙江省孙吴县的胎生蜥蜴染色体组型进行了研究,结果表明其雄性的二倍体染色体数是36,性染色体为ZZ型,2n=34＋ZZ;雌性的二倍体染色体数是35,性染色体为W型,2n=34＋W;所以胎生蜥蜴的性别决定机制为ZZ/W型.胎生蜥蜴的染色体全部为顶端着丝点染色体（除雌性的第5号染色体为亚端着丝点染色体外）,根据其染色体的形态、大小将其配成18对,按照染色体的相对长度把它们分成3组,第Ⅰ组只有第1对染色体（相对长度＞9.0%）,第Ⅱ组包括第2、3和4对染色体（9.0%＞相对长度＞7.0%）,第Ⅲ组包括第5～18对染色体（相对长度＜7.0%）.The karyotpe of Lacerta vivipara from Heilongjiang Province was studied by using medulla cells colchicinehypotonic air-drying technique. The results showed that in males, the number of diploidy chromosome of males was 36, and sex chromosome was the type of ZZ （2n = 34 ＋ ZZ）, while in females, they were 35 and W （2n = 34 ＋ W）. The sex determination mechanism depends on sex chromosomes. All of chromosomes of males and females are telocentric except for females＇ sub-telocentric sex chromosome, The chromosomes were matched into 18 pairs according to their shape and classified into 3 groups according to their length： group A （number 1 pair, relative length 〉9.0% ）, group B （number 2 to 4 pairs, 9.0% （ relative length〉 7.0% ）, and group C （number 5to 18 pairs, relative length（7.0% ）.

关 键 词：胎生蜥蜴 染色体组型 性染色体 性别决定机制 

分 类 号：Q953[生物学—动物学]