《中国畜牧兽医》 ›› 2017, Vol. 44 ›› Issue (1): 173-179.doi: 10.16431/j.cnki.1671-7236.2017.01.024

• 遗传繁育 • 上一篇    下一篇

略阳乌鸡线粒体DNA控制区(D-loop)的遗传多样性分析

尹亚军, 杜伟立, 王令, 张涛   

  1. 陕西理工大学生物科学与工程学院, 汉中 723000
  • 收稿日期:2016-06-12 出版日期:2017-01-20 发布日期:2017-01-19
  • 通讯作者: 张涛 E-mail:zl780823@163.com
  • 作者简介:尹亚军(1991-),男,河南西平县人,硕士生,研究方向:生物重要性状相关基因与功能,E-mail:y928430500@sina.com
  • 基金资助:

    陕西省教育厅专项科研计划项目(15JK1145);陕西理工学院研究生创新基金(SLGYCX1520)

Genetic Diversity of Lueyang Black-bone Chicken Based on Mitochondrial DNA D-loop Region Sequence

YIN Ya-jun, DU Wei-li, WANG Ling, ZHANG Tao   

  1. School of Biological Sciences & Engineering, Shaanxi SCI-TECH University, Hanzhong 723000, China
  • Received:2016-06-12 Online:2017-01-20 Published:2017-01-19

摘要:

为了研究略阳乌鸡线粒体DNA控制区(mtDNA D-loop)的遗传多样性和起源,本研究对30只略阳乌鸡样品的mtDNA D-loop全序列进行了PCR扩增和测序,结合GenBank中公布的其他鸡的D-loop区序列,分析略阳乌鸡线粒体多态性及其起源。结果表明,略阳乌鸡mtDNA D-loop区全序列中,A、C、G、T平均含量分别为26.6%、26.6%、13.4%和33.4%,26个核苷酸多态位点均为转换位点,核苷酸多样度(Pi)为0.00705,单倍型变异度(Hd)为1.000,中性检验Tajima's D值为-0.47272。通过群体构建的系统进化树发现,略阳乌鸡样品在系统进化树上聚为4大分支。研究结果表明,略阳乌鸡群体内个体序列变异程度较大,遗传多样性丰富,揭示略阳乌鸡在遗传组成上具有4个母系来源。

关键词: 略阳乌鸡; 线粒体DNA D-loop; 遗传多样性

Abstract:

This study was aimed to assess mitochondrial DNA D-loop sequence diversity and origin of Lueyang Black-bone chicken.The mtDNA D-loop sequence of 30 individuals from Lueyang Black-bone chicken were amplified by PCR and subsequently sequenced.The mtDNA D-loop sequence of other chicken were collected from GenBank and used as reference sequences to analyze the diversity and origin of Lueyang Black-bone chicken.The results revealed that the average values of base composition of A,C,G and T in mtDNA D-loop the sequence of Lueyang Black-bone chicken were 26.6%,26.6%,13.4% and 33.4%,respectively.26 nucleotide polymorphic sites were transition.The average nucleotide diversity (Pi) of the sites and haplotype diversity (Hd) were 0.00705 and 1.000,and the value of Tajima's D was -0.47272.Phylogenetic tree showed that samples were clusted in 4 clades. In the research, it could be concluded that the genetic diversity was relatively rich and wealthy and there were 4 maternal origins to Lueyang Black-bone chicken population.

Key words: Lueyang Black-bone chicken; mtDNA D-loop; genetic diversity

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