基于细胞色素b基因的大河乌猪群体遗传结构研究

Abstract

Abstract: For revealing the level of genetic divergence and genetic structure of Dahe Black pig, this research was implemented using molecular biological methods that sequenced and analyzed the Cyt b DNA sequences based on 46 samples from 5 geographic populations of Qujing city. The AMOVA results showed that most of genetic variation (62.63%) distributed within populations. This could indicate fully that the whole population genetic structure of this species was not evident because of significant gene flow among different populations. The results of neutrality tests further validated that the instable population structure of this whole group could be affected by the population expansion from the artificial selective breeding and introduction breeding. This instable population structure or lower genetic differentiation could be induced by the large-scale introduction and expanding breeding. The significant gene flow induced the genetic convergence in various geographical populations eventually, population expanding and population genetic diversity declined significantly. This study was expected to provide important scientific basis and data for the molecular genetic breeding of Dahe Black pig and for the manager’s effective measures to protect the genetic resources of Dahe Black pig.

Key words: Dahe Black pig; mitochondrion gene; cytochrome b; genetic diversity; genetic structure

CLC Number:

S813.3

TANG Li-zhou, SHI Xiao-dong, DING Wei, YU Long, WANG Jun-jie, ZHU Lei, GUO Song-chang. Study on Genetic Structure of Dahe Black Pig Based on DNA Sequence Analyses of Cytochrome b Gene[J]. , 2013, 40(4): 45-49.

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Study on Genetic Structure of Dahe Black Pig Based on DNA Sequence Analyses of Cytochrome b Gene

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