内蒙古白绒山羊若干数量性状遗传参数的研究

本研究应用女母回归法、公畜内女母回归法、半同胞相关法和单元内半同胞相关法对内蒙古阿尔巴斯白绒山羊的产绒量、绒厚、毛长、体重、绒伸直长度和细度等六个性状的遗传参数进行了估测。结果表明：（1）绒量遗传力介于0.26～0.45之间;绒厚遗传力介于0.33～0.56之间;毛长遗传力介于0.23～0.32之间;体重的遗传力介于0.1 6～0.36之间;绒伸直长度遗传力为0.24;绒细度的遗传力为0.14。（2）产绒量与绒厚、绒厚与毛长、长度与绒厚、长度与毛长的遗传相关分别介于0.33～0.79、0.51～0.69 、0.38～0.60、0.74～0.90之间,存在较强的正向遗传相关;绒量与毛长、绒量与体重、绒厚与体重、细度与绒厚、细度与绒量、细度与体重的遗传相关分别为0.11～0.38、0 .06～0.17、0.15～0.36、0.02～0.11、0.24～0.35、0.13～0.32之间,存在较弱的正向遗传相关;毛长与体重、长度与绒量、长度与体重、长度与细度、细度与毛长之间的遗传相关介于-0.14～-0.28、-0.09～-0.20、-0.18～-0.23、-0.27～-0.31、-0 .17～-0.28之间,存在中等偏弱的负向遗传相关。（3）绒量、绒厚、毛长、体重的重复率分别为0.42、0.27、0.59、0.18。     

动物模型BLUP法估计内蒙古白绒山羊育种值的研究

应用动物模型ＢＬＵＰ法估计了阿尔巴斯白绒山羊种羊场１９８９－１９９８年共１０个年度３９８１只个体的抓绒量和体重的单性状育种值,以及这两个性状的综合育种值。在模型中考虑的固定效应有年龄效应和性别－群体－年度效应、随机效应有个体的加性效应和个体永久性环境效应。比较育种值选择与表型值选择的结果表明：⑴公羔依据断乳重选择与依据育咱值选择的结果差异较大;⑵育成母羊依据表型值选择与依据综合育种值选择的结果差异     

内蒙古白绒山羊若干数量性状遗传参数的研究

本研究应用女母回归法、公畜内女母回归法、半同胞相关法和单元内半同胞相关法对内蒙古阿尔巴斯白绒山羊的产绒量、绒厚、毛长、体重、绒伸直长度和细度等六个性状的遗传参数进行了估测。结果表明：（1）绒量遗传力介于0.26～0.45之间;绒厚遗传力介于0.33～0.56之间;毛长遗传力介于0.23～0.32之间;体重的遗传力介于0.16～0.36之间;绒伸直长度遗传力为0.24;绒细度的遗传力为0.14。（2）产绒量与绒厚、绒厚与毛长、长度与绒厚、长度与毛长的遗传相关分别介于0.33～0.79、0.51～0.69、0.38～0.60、0.74～0.90之间,存在较强的正向遗传相关;绒量与毛长、绒量与体重、绒厚与体重、细度与绒厚、细度与绒量、细度与体重的遗传相关分别为0.11～0.38、0.06～0.17、0.15～0.36、0.02～0.11、0.24～0.35、0.13～0.32之间,存在较弱的正向遗传相关;毛长与体重、长度与绒量、长度与体重、长度与细度、细度与毛长之间的遗传相关介于-0.14～-0.28、-0.09～-0.20、-0.18～-0.23、-0.27～-0.31、-0.17～-0.28之间,存在中等偏弱的负向遗传相关。（3）绒量、绒厚、毛长、体重的重复率分别为0.42、0.27、0.59、0.18。 Abstract：Daughter-dam regression, daughter-dam regression wit hin sire, half-sib correlation and intro-unit half?sib correlation were used in the study to estimate genetic parameters for several traits of Albas type of In ner Mongolia cashmere goats, Traits included in this paper were cashmere yield ( CY),cashmere thickness(CT),staple length(SL),body eight(BW),cashmere stretched length(CSL) and cashmere fineness(CF).The results showed: (1)Heritabilities for CY,CT,SL and BW ranged between 0.26 and 0.45,between 0.33 and 0.56, between 0.23 and 0.32 and between 0.16 and 0.36 respectively; Heritabilities for SL and CF were 0.24 and 0.14 respectively.(2)Genetic correlations between CY and CT,between CT and SL ,between SL and CT and between CST and SL ranged 0.33～0. 79, 0.51～0.69, 0.38～0.60, and 0.74～0.90,respectively,and they belonged to high positive one;Genetic correlations between CY and SL, between CY and betw een CY and BW,between CT and BW, between CF and CT, between CF and CY and betwe en CF and BW ranged 0.11～0.38, 0.06～0.17,0.15～0.36, 0.02～0.11, 0.24 ～0.35 and 0.13～0.32,respectively, and they belonged to low positive correla tion;Genetic correlations between SL and BW, between SL and CY,between SL ?and BW, between? SL and CF and between CF and SL ranged -0.14～-0.28, -0.09～-0 .20, -0.18～-0.23,-0.27～-0.31,and -0.17～-0.28,respectively,and they belonged to low negative correlations.(3)Repeatabilities for CY,CT,SL and BW were 0.42,0.27,0.59 and 0.18,respectively.     

动物模型BLUP法评定内蒙古白绒山羊的遗传趋势

本研究应用动物模型BLUP法估计了1989～1998年内蒙古鄂托克旗阿尔巴斯白绒山羊种羊场抓绒量和抓绒后体重的遗传进展。结果为抓绒量的遗传进展呈上升趋势,抓绒后体重的遗传进展基本平稳。研究表明,内蒙古白绒山羊根据个体表型值选种,存在准确性较差和难以同时兼顾两个性状的缺点。本文认为今后内蒙古白绒山羊选种方法应该采用动物模型BLUP法。 Abstract:In this study,animal model BLUP method was used to estimate genetic trend for cashmere yield and bodyweight during 1989～1998 at Albas goats farm,Etuoke Banner,Inner Mongolia.The results were that genetic trend for cashmere yield had a rising trend and for bodyweight showed smooth.The study indicated selecting Inner Mongolia cashmere goats based on phenotypic value had a low accuracy and was difficult to give consideration to the two traits at the same time.The article raised animal model BLUP method should be used to select Inner Mongolia white cashmere goats in future.