绵羊尾长变异遗传规律的分析  

Analysis of the Genetic Pattern of Tail Length Variation in Sheep

作　　者：李婧平 李忠慧 刘璇 马海叶 岳成广 王嘉俊 张倩雯 李文蓉[2] LI Jingping;LI Zhonghui;LIU Xuan;MA Haiye;YUE Chengguang;WANG Jiajun;ZHANG Qianwen;LI Wenrong(College of Animal Science and Technology,Shihezi University,Shihezi 832003,China;Institute of Biotechnology,Xinjiang Uygur Autonomous Region Academy of Animal Science,Urumqi 830026,China;College of Animal Science,Xinjiang Agricultural University,Urumqi 830052,China)

机构地区：[1]石河子大学动物科技学院,新疆石河子832003 [2]新疆维吾尔自治区畜牧科学院生物技术研究所,新疆乌鲁木齐830026 [3]新疆农业大学动物科学学院,新疆乌鲁木齐830052

出　　处：《华北农学报》2024年第S1期312-319,共8页Acta Agriculturae Boreali-Sinica

基　　金：新疆维吾尔自治区自然科学基金重点项目(2021D01D13)。

摘　　要：为掌握绵羊尾长性状的遗传特性,评估绵羊尾长变异相关候选标记TBXT基因c.C334A基因型的遗传效应,为选育绵羊短尾性状提供参考。选择长尾特克赛尔羊和无尾哈萨克羊及其杂交F 1、F 2群体为研究对象,分析了尾椎数变异的遗传规律,开展了尾椎数和尾长的相关性分析。利用SPSS 26.0回归分析,在特克赛尔羊和哈萨克羊的杂交群体中评估TBXT c.C334A对尾长变异的基因型效应。结果显示,特克赛尔羊平均尾椎数为17.87±1.30、偏度1.18±0.58、峰度1.37±1.12,哈萨克羊平均尾椎数为3.52±1.03、偏度0.54±0.50、峰度0.34±0.97,F 1群体平均尾椎数为12.61±1.82、偏度-0.40±0.54、峰度1.52±1.08,F 2群体平均尾椎数为11.67±2.63、偏度-0.70±0.23、峰度-0.12±0.46,表明绵羊尾椎数在亲本和子代的遗传符合数量性状遗传规律。绵羊尾椎数对尾长的决定系数R^(2)为0.726,表明尾椎数变化是尾长变异的主要影响因素。在受试的杂交群体中,TBXT c.C334A对尾长变异的加性效应、显性效应和替代效应分别为2.62,0.14,2.57,该位点解释了尾长表型变异的43.96%,提示TBXT c.C334A是通过影响尾椎数进而影响尾长作用效应较大的遗传标记。In order to grasp the genetic characteristics of sheep tail length trait,evaluate the genetic effect of c.C334A genotype of TBXT gene,a candidate marker related to sheep tail length variation,and provide a reference for breeding sheep short tail trait.The long-tailed Texel sheep,tailless Kazakh sheep,and hybrid F 1 and F 2 progeny populations were selected as the research objects.The genetic pattern of the number of tail vertebrae was analyzed,and the correlation between the number of tail vertebrae and tail length was analyzed.The genotype effect of TBXT c.C334A on tail length variation was evaluated in the hybrid population of Texel sheep and Kazakh sheep using SPSS 26.0 regression analysis.The results showed that the average number of caudal vertebrae,skewness and peakedness of Texel sheep were 17.87±1.30,1.18±0.58 and 1.37±1.12,respectively.The average number of caudal vertebrae,skewness and peakedness of Kazak sheep were 3.52±1.03,0.54±0.50 and 0.34±0.97,respectively.The average number of caudal vertebrae,skewness and peakedness of the F 1 population were 12.61±1.82,-0.40±0.54 and 1.52±1.08,respectively.The average number of caudal vertebrae,skewness and peakedness of the F 2 population were 11.67±2.63,-0.70±0.23 and-0.12±0.46,respectively.It showed that the inheritance of the number of sheep tail vertebrae in parents and offspring conformed to the genetic pattern of quantitative traits.The coefficient of determination R^(2) of the number of tail vertebrae to the tail length of sheep was 0.726,indicating that the change of the number of tail vertebrae was the main influencing factor of the tail length variation.The additive effect,dominant effect and substitution effect of TBXT c.C334A on tail length variation were 2.62,0.14 and 2.57,respectively.This locus explained 43.96%of the phenotypic variation of tail length,suggesting that TBXT c.C334A is a genetic marker that affects the tail length by affecting the number of tail vertebrae.

关 键 词：绵羊 尾长 尾椎数 TBXT 遗传规律 

分 类 号：S826[农业科学—畜牧学]