摘要 : The objective of this study was to investigate the phylogenetic relationship of indigenous varieties/breeds of pig, goat and chicken of northeastern region of India with their exotic counterparts using the nucleotide sequence of t... 展开 The objective of this study was to investigate the phylogenetic relationship of indigenous varieties/breeds of pig, goat and chicken of northeastern region of India with their exotic counterparts using the nucleotide sequence of the mitochondrial cytochrome b gene. Five animals each belonging to the Miri, Mizo-Local and White Leghorn chicken breeds, turkey, Khasi-Local and Hampshire pig breeds and Assam Hill goat breed were used in this study. Mitochondrial cytochrome b gene sequences of Red Jungle Fowl and Black Bengal goat were retrieved from the Genbank database and also used in this study. Sequence analysis of cytochrome b gene revealed 4 nucleotide variation sites between Khasi-Local and Hampshire pig breeds with 1.4% sequence divergence. Indigenous chickens and White Leghorn chicken shared identical sequences. Moreover, between domestic chicken breeds and Red Jungle Fowl, 4 variation sites were observed with 1.1% sequence divergence. The turkey shared 80.4% similarity and 19.2% divergence with domestic chicken breeds, whereas it shared 79% sequence similarity and 20.7% divergence with the Red Jungle Fowl. The Assam Hill and Black Bengal goat breeds had 3 sequence variation sites with 0.8% sequence divergence. 收起