Abstract: Phylogenetic and genetic diversity of four local goat breeds were analyzed by mitochondrial Hypervariable Region (HVR) in 89 individuals from Chinese tropical zone. A total of 36 haplotypes which defined 64 polymorphic sites were found in the study. Comparing with the published mtDNA control region sequences, two mtDNA lineages (A and B) were identified by the phylogenetic analysis in which lineage A was 57.30%, lineage B was 42.70%, haplotype A was 47.22%, haplotype B was 36.11%. The interest in the study was that the proportion of lineage B was up to 80.95% in Hainan black goat, lineage A was only 19.05%. The genetic diversity showed that Hainan black goat had the lowest variability. The average diversity and nucleotide diversity were 0.957±0.007 and 0.02887±0.00256, respectively. A mantel test and the Analysis of Molecular Variance (ANOVA) indicated that there was no significant geographical structuring in Chinese tropical zone goat breeds. Mismatch analysis showed that haplogroup A and B had not experienced population expansion events. According to the study and previous evidence, researchers speculated that lineage B of goat breed might originate from Hainan Island of China.
S. Guan, H.L. Zhou, G.Y. Hou, D.J. Wang, T.S. Xu, D.F. Wang, L.G. Shi, G. Rong and M. Li, 2013. New Evidence Discovery for Maternal Lineage B of Goats (Capra hircus) in Chinese Tropical Zone. Agricultural Journal, 8: 123-130.