LEPR及LEP基因表达量对FecB不同基因型小尾寒羊产羔数的影响

doi:10.11843/j.issn.0366-6964.2018.05.010

畜牧兽医学报 ›› 2018, Vol. 49 ›› Issue (5): 954-961.doi: 10.11843/j.issn.0366-6964.2018.05.010

LEPR及LEP基因表达量对FecB不同基因型小尾寒羊产羔数的影响

于嘉瑞¹, 王翔宇², 郭晓飞², 贺小云², 孙庆², 文禹粱³, 狄冉², 刘秋月², 胡文萍², 张效生⁴, 张金龙⁴, 孙伟^1*, 储明星^2*

1. 扬州大学动物科学与技术学院, 扬州 225009;
2. 中国农业科学院北京畜牧兽医研究所, 农业部动物遗传育种与繁殖重点实验室, 北京 100193;
3. 甘肃农业大学动物科学技术学院, 兰州 730070;
4. 天津市畜牧兽医研究所, 天津 300381

收稿日期:2017-12-04 出版日期:2018-05-23 发布日期:2018-05-23
通讯作者: 孙伟,博士,教授,主要从事肉羊遗传育种研究,Tel:0514-87990705,E-mail:dkxmsunwei@163.com;储明星,博士,研究员,主要从事羊优异繁殖性状的分子机理研究,Tel:010-62819850,E-mail:mxchu@263.net
作者简介:于嘉瑞(1990-),男,宁夏银川人,硕士生,主要从事动物分子遗传学研究,E-mail:15161889913@163.com;王翔宇(1986-),女,安徽淮北人,博士,助理研究员,主要从事动物分子遗传学研究,E-mail:wangxiangyu@caas.cn
基金资助:
国家自然科学基金（31772580）；国家转基因科技重大专项（2016ZX08009-003-006；2016ZX08010-005-003）；国家肉羊产业技术体系专项（CARS-38）；中央级公益性科研院所基本科研业务费专项（Y2017JC24；2017ywf-zd-13）；中国农业科学院科技创新工程（ASTIP-IAS13；CAAS-XTCX2016010-01-03；CAAS-XTCX2016010-03-03；CAAS-XTCX2016011-02-02）；宁夏农林科学院科技创新先导资金（DWJLC-2016001）；内蒙古自治区科技重大专项；农业科研杰出人才及其创新团队项目；国家万人计划科技创新领军人才项目；天津市科技计划项目（16ZXZYNC00050）

Effects of Expression of LEPR and LEP Genes on Litter Size of Small Tail Han Sheep with Different FecB Genotypes

YU Jia-rui¹, WANG Xiang-yu², GUO Xiao-fei², HE Xiao-yun², SUN Qing², WEN Yu-liang³, DI Ran², LIU Qiu-yue², HU Wen-ping², ZHANG Xiao-sheng⁴, ZHANG Jin-long⁴, SUN Wei^1*, CHU Ming-xing^2*

1. College of Animal Science and Technology, Yangzhou University, Yangzhou 225009, China;
2. Key Laboratory of Animal Genetics, Breeding and Reproduction of Ministry of Agriculture, Institute of Animal Science, Chinese Academy of Agricultural Sciences, Beijing 100193, China;
3. College of Animal Science and Technology, Gansu Agricultural University, Lanzhou 730070, China;
4. Tianjin Institute of Animal Sciences, Tianjin 300381, China

Received:2017-12-04 Online:2018-05-23 Published:2018-05-23

摘要/Abstract

摘要：

旨在探索瘦素受体（Leptin receptor，LEPR）和瘦素（Leptin，LEP）基因与绵羊产羔数之间的关系。选择2～3岁健康母羊21只，对FecB野生纯合型（++）（9只）及突变纯合型（BB）（12只）小尾寒羊同期发情，通过腹腔镜记录排卵数。使用实时荧光定量PCR技术检测LEPR和LEP基因在卵泡期小尾寒羊11种组织（心、肝、脾、肺、肾、肾上腺、输卵管、子宫体、垂体、下丘脑、卵巢）中的表达以及在卵泡期和黄体期、BB型和++型小尾寒羊下丘脑-垂体-卵巢性腺轴的表达。结果表明，BB型的排卵数（P=0.003 5）和产羔数（P=0.004 0）极显著高于++型。LEPR和LEP在卵泡期各个组织均有表达；其中LEPR基因在卵巢、子宫体、肾上腺组织高表达，LEP基因在下丘脑、垂体、卵巢和肾组织高表达。在卵巢中，卵泡期++型LEPR基因表达量高于黄体期++型，但差异不显著（P>0.05）；卵泡期BB型LEPR基因表达量极显著高于卵泡期++型（P=0.007）、黄体期BB型（P=0.003）和黄体期++型（P=0.003）。综上表明，卵泡期LEPR基因高表达与小尾寒羊产羔数增加存在一定程度的正相关，这为小尾寒羊产羔性状选育提高提供了新的线索。

Abstract:

The aim of this study was to determine if the expression of leptin receptor (LEPR) and leptin (LEP) genes was associated with litter size of Small Tail Han ewes. Twenty one healthy Small Tail Han ewes, composed of 9 FecB wild type (++) and 12 FecB mutation homozygous type (BB), about 2-3 years old, were used to investigate the ovulation rate by laparoscopy after spontaneous estrus with CIDR. Real-time PCR was used to detect the expression of LEPR and LEP genes in 11 tissues (heart,liver,spleen,lung,kidney,adrenal gland, fallopian tube,uterus,hypothalamus,pituitary and ovary)of Small Tail Han ewes during follicular phase and in hypothalamus-pituitary-ovary gonadal axis of Small Tail Han ewes (++ and BB genotypes) during luteal phase and follicular phase. The results showed that both ovulation number (P=0.003 5) and litter size (P=0.004 0) of individuals with BB genotype were significantly higher than that of individuals with ++ genotype. These 2 genes were all expressed in 11 tissues during follicular phase, the expression of LEPR gene was high in ovary, uterus and adrenal gland, and the expression of LEP gene was high in hypothalamus, pituitary, ovary and kidney. In ovary, the expression of LEPR gene of individuals with ++ genotype during follicular phase was higher (P>0.05) than that during luteal phase. The LEPR expression of individuals with BB genotype during follicular phase was significantly higher than that of individuals with ++ genotype during follicular phase (P=0.007), BB genotype during luteal phase (P=0.003) and ++ genotype during luteal phase (P=0.003). Therefore, we concluded that there was a positive correlation between the high expression of LEPR gene during follicular phase and high litter size in Small Tail Han ewes, which provided a new clue for improving litter size in Small Tail Han sheep.

中图分类号:

S826.2

于嘉瑞, 王翔宇, 郭晓飞, 贺小云, 孙庆, 文禹粱, 狄冉, 刘秋月, 胡文萍, 张效生, 张金龙, 孙伟, 储明星. LEPR及LEP基因表达量对FecB不同基因型小尾寒羊产羔数的影响[J]. 畜牧兽医学报, 2018, 49(5): 954-961.

YU Jia-rui, WANG Xiang-yu, GUO Xiao-fei, HE Xiao-yun, SUN Qing, WEN Yu-liang, DI Ran, LIU Qiu-yue, HU Wen-ping, ZHANG Xiao-sheng, ZHANG Jin-long, SUN Wei, CHU Ming-xing. Effects of Expression of LEPR and LEP Genes on Litter Size of Small Tail Han Sheep with Different FecB Genotypes[J]. ACTA VETERINARIA ET ZOOTECHNICA SINICA, 2018, 49(5): 954-961.

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LEPR及LEP基因表达量对FecB不同基因型小尾寒羊产羔数的影响

Effects of Expression of LEPR and LEP Genes on Litter Size of Small Tail Han Sheep with Different FecB Genotypes

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