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静原鸡ELOVL2基因遗传多态性研究
引用本文:母童,顾亚玲,赵平,冯小芳,陈佳萍,陈亚飞,刘丽元,蒋秋斐,张娟. 静原鸡ELOVL2基因遗传多态性研究[J]. 中国畜牧兽医, 2018, 45(3): 730-737. DOI: 10.16431/j.cnki.1671-7236.2018.03.022
作者姓名:母童  顾亚玲  赵平  冯小芳  陈佳萍  陈亚飞  刘丽元  蒋秋斐  张娟
作者单位:1. 宁夏大学农学院, 银川 750021;
2. 彭阳县畜牧技术推广服务中心, 固原 756500
基金项目:2017年自治区级大学生创新创业训练计划项目--静原鸡ELOVL5基因的多态性研究(Q201710749050)
摘    要:为了探讨静原鸡极长链脂肪酸延伸酶蛋白2(elongation of very-long-chain fatty acids 2,ELOVL2)基因的遗传特性,确定核苷酸的变异位点,本研究采用PCR-SSCP及DNA测序技术对静原鸡ELOVL2基因进行多态性检测。结果显示,静原鸡ELOVL2基因外显子6无多态性,内含子2和6呈中度多态。在ELOVL2基因内含子2扩增片段上共检测到5种基因型:A2A2、B2B2、C2C2、D2D2和A2C2,4种等位基因:A2、B2、C2和D2,其中A2为优势等位基因(0.62),A2A2基因型为优势基因型(0.54);3个SNPs位点:g.63372228+4918G > A的转换、g.63372228+5024T > C的转换和g.63372228+4928C > A的颠换。在E2e6I6扩增片段上共检测到3种基因型:A1A1、B1B1和A1B1,2种等位基因:A1和B1,其中A1为优势等位基因(0.67),A1A1基因型为优势基因型(0.54),等位基因B1存在g.63388000+748G > C的颠换。群体遗传学分析发现,静原鸡ELOVL2基因内含子2、6遗传纯合度均较高,且偏离了Hardy-Weinberg平衡(P < 0.05)。本研究结果表明,静原鸡ELOVL2基因内含子2和6序列突变较高,且呈中度多态,表现出纯合子优势,外显子6上无突变。

关 键 词:静原鸡  ELOVL2基因  多态性  
收稿时间:2017-09-15

Study on Polymorphism of ELOVL2 Gene in Jingyuan Chicken
MU Tong,GU Yaling,ZHAO Ping,FENG Xiaofang,CHEN Jiaping,CHEN Yafei,LIU Liyuan,JIANG Qiufei,ZHANG Juan. Study on Polymorphism of ELOVL2 Gene in Jingyuan Chicken[J]. China Animal Husbandry & Veterinary Medicine, 2018, 45(3): 730-737. DOI: 10.16431/j.cnki.1671-7236.2018.03.022
Authors:MU Tong  GU Yaling  ZHAO Ping  FENG Xiaofang  CHEN Jiaping  CHEN Yafei  LIU Liyuan  JIANG Qiufei  ZHANG Juan
Affiliation:1. College of Agriculture, Ningxia University, Yinchuan 750021, China;
2. Animal Husbandry and Technology Promotion Service Center of Pengyang County, Guyuan 756500, China
Abstract:In order to study the genetic characteristics and nucleotide polymorphism sites of elongation of very-long-chain fatty acids 2 (ELOVL2) gene in Jingyuan chicken,the polymorphisms of ELOVL2 gene were detected by polymerase chain reaction-single strand conformation polymorphism (PCR-SSCP) and DNA sequence.The results showed that there was no polymorphism of ELOVL2 gene exon 6,there were moderate polymorphism of introns 2 and 6 in Jingyuan chicken.The total of 5 genotypes(A2A2,B2B2,C2C2,D2D2 and A2C2),4 alleles(A2,B2,C2 and D2) and 3 SNPs loci were detected on the intron 2 amplified fragment of ELOVL2 gene.The 3 SNPs were g.63372228+4918G > A transformation,g.63372228+5024T > C transformation and g.63372228+4928C > A transversion.A2 was the dominant allele (0.62),and A2A2 was the dominant genotype (0.54).The total of 3 genotypes (A1A1,B1B1 and A1B1) and 2 alleles (A1 and B1) were detected on E2e6I6 amplified fragments.A1 was the dominant allele (0.67),A1A1 was the dominant genotype (0.54),and only allele B1 had a g.63388000+748G > C transversion.Population genetics analysis showed that genetic homozygosity of ELOVL2 gene introns 2 and 6 in Jingyuan chicken were higher and deviation from Hardy-Weinberg equilibrium (P < 0.05).The results showed that the mutations of the ELOVL2 gene introns 2 and 6 in the Jingyuan chicken were high,which were moderate polymorphism,showing the homozygous advantage and no mutation on the exon 6.
Keywords:Jingyuan chicken  ELOVL2 gene  polymorphism  
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