[Divergence and systematical evolution of three Leuciscus species in Xinjiang based on mitochondrial DNA control region sequences].
Nucleotide sequence of fish mitochondria DNA (mtDNA) D-loop region from Leuciscus leuciscus baicalensis, L. merzbacheri, and L. idus in Xinjiang, China, were examined by sequencing 667 - 669 bp length of homological fragments in the D-loop from 24 individuals of the three fish species. DNA divergence ranged from 6.39% - 9.89% among the three fish species in the genius of Leuciscus cuvier. The sequence similarity is high and the variation is low between L. Leuciscus baicalensis and L. idus. In contract, the genetic distance is larger between L. Leuciscus baicalensis and L. merzbacheri. The average nucleotide variation within each of the two geographical populations (Sailimu lake and E' erqis river) of L. leuciscus baicalensis is 1.07% and 1.08%, respectively, and such variation is 1.07% between the two populations. These results demonstrate that the two geographic populations of L. leuciscus baicalensis do not appear to have significant genetic differentiation. Sequencing data showed the existence of sufficient genetic variations among three species of fish, as illustrated by distinct haplotypes for each species. The phylogenetic trees built with MEGA1.02 pointed out that the relationship between L. leuciscus baicalensis and L. idus is close, and L. merzbacheri is ancient among three Leuciscus.
Hu
Wen-Ge
WG
Bio-Engineering College, Shihezi University, Shihezi 832003, China. hwg-t@163.com
Duan
Zi-Yuan
ZY
Wang
Jin-Fu
JF
Sheng
Jin-Liang
JL
Ma
Run-Lin
RL
D000818:Animals; D001483:Base Sequence; D003530:Cyprinidae / Q000145:classification / Q000235:genetics*; D004272:DNA, Mitochondrial / Q000737:chemistry*; D006238:Haploidy; D008969:Molecular Sequence Data; D010802:Phylogeny; D012045:Regulatory Sequences, Nucleic Acid
D004272:DNA, Mitochondrial