金线巴鱼属两亚种mtDNA的序列变异(英文)  

Mitochondrial DNA Variation in Two Subspecies of Sinocyclocheilus as Revealed by DNA Sequences

作　　者：肖春杰[1] 李梅章[1] 李维贤 昝瑞光[1] 

机构地区：[1]云南大学生物系

出　　处：《云南大学学报（自然科学版）》1998年第3期218-220,共3页Journal of Yunnan University(Natural Sciences Edition)

摘　　要：对抚仙金线巴鱼和滇池金线巴鱼的线粒体细胞色素ｂ基因的部分序列进行了测定及分析。发现①两亚种间共有３８个变异位点，占总位点的１０．９％；②转换明显多于颠换，且第三位置上的同义突变最为常见；③两亚种间的遗传距离为０．１１４，高于已研究过的淡水鱼类种内遗传距离的最大值，接近种间的较高值，是否仍然把它们视为同种的两个亚种看来值得进一步研究。We determined the DNA sequence of the mitochondrial cytochrome b gene for S.grahami grahami (Regan) and S.grahami tingi Fang.DNA was prepared for sequencing by PCR.38 variable positions were found (comprising 10.9% number of the 349 total sites).Their transitions greatly outnumber transversion.Third position silent substitutions predominated over any other type of nucleotide change.The genetic distance between these two subspecies was 11.4%, which was within the range of divergence among species of fish but much higher than that among intraspecies.

关 键 词：金线Ba属 MTDNA序列 变异 

分 类 号：Q959.468[生物学—动物学]