摘要
对26尾三倍体湘云鲫的线粒体tRNA-Thr基因、tRNA-Pro基因和部分控制区的核苷酸序列进行了测定,获得26条长度为837—839 bp的同源基因序列,共发现65个多态性核苷酸变异位点,多态位点比例为0.077,定义了8种单元型。在湘云鲫8种单元型中确认了DNA复制终止相关的序列TAS、中央保守区序列(CSB-F、CSB-E和CSB-D)和保守序列CSB1,8种单元型含有3—5个TAS序列。在65个变异位点中,大部分序列变异为转换,8种单元型之间的序列差异在0.1%—6.3%之间。该研究为三倍体湘云鲫的繁殖和遗传改良提供了一些有价值的信息。
The article presented the results of the first regular population study of triploid hybrids of crucian carp and common carp by sequencing the tRNA-Thr gene,tRNA-Pro gene,and partial control region of mitochondrial DNA（mtDNA）.The 26 sequenced fragments ranged from 837 to 839 bp in length.The termination associated sequence（TAS） motifs,central conserved sequence blocks（CSB-F,CSB-E,CSB-D）,and conserved sequence block（CSB1） were identified in the mtDNA control region.Most heteroplasmic fish had 3—5 TAS repeat units.The above sequences from 26 triploid hybrids were detected 65 polymorphic sites,yielding 8 haplotypes.Sequence divergence among different haplotypes ranged from 0.1% to 6.3%.This study provided some invaluable information for the reproducibility and genetic improvement of triploid hybrids.
出处
《水生生物学报》
CAS
CSCD
北大核心
2007年第6期855-862,共8页
Acta Hydrobiologica Sinica
基金
National Natural Science Foundation of China(No.30170733,No.30330480)
State Key Basic Research(973)Project of China(No.2001CB109006)
Training Project of Excellent Young Research of State Education Ministry of China(No.200248)
关键词
三倍体湘云鲫
线粒体DNA
控制区
序列变异
Triploid hybrids
Mitochondrial DNA
Control region
Sequence variation
