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7个基因在小尾寒羊性腺轴相关组织中的表达差异分析

2021-11-26周祖阳贺小云刘玉芳储明星

安徽农业科学 2021年21期

周祖阳 贺小云 刘玉芳 储明星

摘要 [目的]探究绵羊多羔性状候选基因CLSTN2、CCNB2、SRD5A2、HBEGF、FGFR1、GRIA2和FTH1在小尾寒羊性腺轴7种组织(大脑、小脑、下丘脑、垂体、子宫、卵巢、输卵管)中的表达情况,为阐明绵羊高繁殖力分子机理提供参考。[方法]以FecB BB型和++型小尾寒羊为研究对象,采用实时荧光定量PCR方法检测7个基因在性腺轴相关组织中的表达差异。[结果]CLSTN2基因在++型小尾寒羊卵巢中的表达量显著高于BB型小尾寒羊(P<0.05),SRD5A2基因在BB型小尾寒羊卵巢中的表达量显著高于++型小尾寒羊(P<0.05),FGFR1和FTH1基因在++型小尾寒羊子宫中的表达量显著高于BB型小尾寒羊(P<0.05),CCNB2、HBEGF和GRIA2基因在++型和BB型小尾寒羊性腺轴各组织中的表达量差异不显著(P>0.05)。[结论]CLSTN2、FGFR1和SRD5A2基因對小尾寒羊繁殖力具有一定的调控作用,其中SRD5A2基因对小尾寒羊的多羔性状具有一定的正向调节功能,而CLSTN2和FGFR1基因则呈现相反的调控作用。

关键词 绵羊;多羔;候选基因;性腺轴;表达差异

中图分类号 S 826  文献标识码 A

文章编号 0517-6611(2021)21-0118-06

doi:10.3969/j.issn.0517-6611.2021.21.029

开放科学(资源服务)标识码(OSID):

Expression Difference Analysis of 7 Genes in the Related Tissues of Gonadal Axis of Small Tail Han Sheep

ZHOU Zu-yang  HE Xiao-yun LIU Yu-fang 2 et al

(1.Key Laboratory of Animal Genetics,Breeding and Reproduction of Ministry of Agriculture and Rural Affairs,Institute of Animal Sciences,Chinese Academy of Agricultural Sciences,Beijing 100193;2.College of Life Science and Food Engineering,Hebei University of Engineering,Handan,Hebei  056001)

Abstract [Objective] To explore the expression of multi-lamb candidate genes CLSTN CCNB SRD5A HBEGF,FGFR GRIA2 and FTH1 in 7 kinds of tissues (brain,cerebellum,hypothalamus,pituitary,uterus,ovary,fallopian tube) in the gonadal axis of Small Tail Han Sheep,and provide references for clarifying the molecular mechanism of sheeps high fertility.[Method] Using FecB BB type and ++ type Small Tail Han Sheep as the research objects,real-time fluorescent quantitative PCR method was used to detect the expression differences of 7 genes in the related tissues of the gonadal axis.[Result]The relative expression level of CLSTN2 gene in ovary of ++ type Small Tail Han Sheep was significantly higher than that of BB type Small Tail Han Sheep(P<0.05),the relative expression level of SRD5A2 gene in ovary of BB type Small Tail Han Sheep was significantly higher than that of ++ type Small Tail Han Sheep(P<0.05),and the relative expression levels of FGFR1 gene and FTH1 gene in uterus of ++ type Small Tail Han Sheep were significantly higher than those  of BB type Small Tail Han Sheep(P<0.05),while

the relative expression levels of CCNB2 gene,HBEGF gene and GRIA2 gene had no significant difference in different tissues of the gonadal axis of ++ type and BB type Small Tail Han Sheep (P>0.05).[Conclusion]CLSTN FGFR1 and SRD5A2 genes might have some regulations on the fecundity of Small Tail  Han Sheep.Among them,SRD5A2 gene might have some positive regulation functions on multi-lambing traits of Small Tail Han Sheep,while CLSTN2 gene and FGFR1 gene showed an opposite regulation effect.

Key words Sheep;Multiple lambs;Candidate gene;Gonadal axis;Expression difference

基金项目 国家自然科学基金项目(31772580);国家肉羊产业技术体系专项(CARS-38);中国农业科学院科技创新工程项目(ASTIP-IAS13)。

作者简介 周祖阳(1994—),男,湖北鄂州人,硕士研究生,研究方向:动物遗传育种。*通信作者,刘玉芳,讲师,博士,从事动物遗传育种研究;储明星,研究员,博士,从事肉羊遗传育种研究。

收稿日期 2021-01-31

多羔性状是绵羊重要的繁殖性状之一,提高每胎的产羔数是提升绵羊养殖经济效益的有效方法[1],因此对绵羊多羔性状候选基因的研究具有重要意义。大量研究表明,雌性动物繁殖性能主要受下丘脑-垂体-性腺轴(hypothalamic-pituitary-gonadal axis,HPGA)的调控,HPGA的相关基因是研究动物繁殖性状的重要候选基因[2]。近年来,随着分子实验技术的不断发展,绵羊多羔性状主效基因也陆续被发现,利用分子标记对绵羊多羔性状相关候选基因进行基因型选择,取得了重大进展。首……

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