›› 2013, Vol. 40 ›› Issue (4): 32-35.

• 生物技术 • 上一篇    下一篇

不同绵羊群体间心脏型脂肪酸结合蛋白基因第2外显子单核苷酸多态性的研究

赵雪1,2, 曹阳2, 金海国2, 张立春2, 于永生2, 罗晓彤2, 李德允1   

  1. 1. 延边大学农学院,吉林延吉 133002;
    2. 吉林省农业科学院畜牧分院,吉林公主岭 136100
  • 收稿日期:2012-12-13 出版日期:2013-04-20 发布日期:2013-04-19
  • 通讯作者: 李德允(1963-),男,吉林人,博士,硕士生导师,从事分子营养与反刍动物。E-mail: dyli@ybu.edu.cn E-mail:dyli@ybu.edu.cn
  • 作者简介:赵雪(1986-),女,吉林人,硕士生,研究方向:分子遗传与动物育种。
  • 基金资助:
    国家肉羊产业技术体系(CARS-39)。

Studies on Single Nucleotide Polymorphisms at the Exon 2 of H-FABP Gene among Different Sheep Breeds

ZHAO Xue1,2, CAO Yang2, JIN Hai-guo2, ZHANG Li-chun2, YU Yong-sheng2, LUO Xiao-tong2, LI De-yun1   

  1. 1. College of Agriculture, Yanbian University, Yanji 133002, China;
    2. Branch of Animal Husbandry, Jilin Academy of Agricultural Sciences, Gongzhuling 136100, China
  • Received:2012-12-13 Online:2013-04-20 Published:2013-04-19

摘要: 以东北细毛羊、小尾寒羊、杜泊和道赛特4个群体为研究对象,采用PCR-SSCP方法对心脏型脂肪酸结合蛋白(heart fatty acid binding protein,H-FABP)基因第2外显子单核苷酸多态性进行检测。结果发现,H-FABP基因第2外显子存在939(A/G)、980(G/A)、1013(A/C)和1018(T/C)4个SNP位点,表现出AA、AB、BB 3种基因型;在东北细毛羊、小尾寒羊和杜泊群体中,BB型为优势基因型,在道赛特群体中,AB型为优势基因型;经χ2检验后,4个绵羊品种群体的基因频率和基因型频率均处于Hardy-Weinberg平衡状态;群体遗传多态性分析结果表明,东北细毛羊、杜泊和道赛特3个群体中的多态信息含量(PIC)均处于0.25和0.50之间,为中度多态,小尾寒羊为低度多态(PIC<0.25);进一步分析结果表明,各个群体存在不同程度的遗传变异。

关键词: 绵羊; 心脏型脂肪酸结合蛋白; 单核苷酸多态性

Abstract: PCR-SSCP approach was applied to test the single nucleotide polymorphisms (SNPs) at the exon 2 of heart fatty acid-binding protein (H-FABP) gene and four sheep populations that comprised of Northeast fine wool sheep, Small-Tailed Han sheep, Dorper sheep and Dorsets sheep were screened in this study. The results showed that four SNPs at 939(A/G), 980(G/A), 1013(A/C), 1018(T/C) and three genotypes were detected. During the Northeast fine wool sheep, Small-Tailed Han sheep and Dorper populations, the BB was the predominant genotype. While in Dorsets sheep, the AB was the predominant genotype. A chi-square analysis suggested that the allele frequencies and genotype frequencies of H-FABP gene were in Hardy-Weinberg equilibrium. Statistical analysis revealed an intermediate polymorphism information content (PIC) in the Northeast fine wool sheep, Dorper sheep and Dorsets populations (0.25<PIC<0.50), but a low PIC in the Small-Tailed Han sheep population (PIC<0.25). Further analysis showed that the different groups had different degree of genetic variation.

Key words: sheep; heart fatty acid binding protein (H-FABP); SNPs

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