title: The genetic diversity of mtDNA D-loop and the origin of Chinese goats.
abstract: The complete sequences of mitochondrial DNA D-loop of 128 individuals in nine Chinese goat (Capra hircu) breeds were analyzed by DNA sequencing technology. The results show that the length of mtDNA D-loop in Chinese goats is 1,212-1,213 bp. There are 102 polymorphic sites, accounting for 8.42% of 1,212 bp sequence. Ninety-two mtDNA haplotypes were determined. The haplotype diversity and nucleotide diversity are 0.9333-1.0000 and 0.7062%-1.8265%, respectively. The results indicate that the genetic diversity of Chinese goats is very abundant. The NJ tree indicates that Chinese goats have two types of maternal origins from lineage A and lineage B. The possibility of lineage B originating from China is also discussed.
authors.affiliation: College of Animal Science and Technology, Northwest A&F University, Yangling, China.
authors.forename: Ruo-Yu
authors.initials: RY
authors.lastname: Liu
authors.forename: Gong-She
authors.initials: GS
authors.lastname: Yang
authors.forename: Chu-Zhao
authors.initials: CZ
authors.lastname: Lei
mesh_terms: D000818:Animals; D001483:Base Sequence; D002681:China; D004272:DNA, Mitochondrial / Q000235:genetics*; D014644:Genetic Variation; D006041:Goats / Q000145:classification / Q000235:genetics*; D006239:Haplotypes; D008969:Molecular Sequence Data; D010802:Phylogeny; D017422:Sequence Analysis, DNA
chemical_list: D004272:DNA, Mitochondrial