辽宁绒山羊毛囊性状遗传参数的估计——辽宁绒山羊的遗传研究之一  

Genetic Parameter Estimates of Follicle Traits in Liaoning Cashmere Goat

作　　者：马宁[1] 李永军[1] 宋雅琴[1] 宋宪忱 

机构地区：[1]吉林农业大学动物科技学院,长春130118 [2]辽宁绒山羊原种场,盖州115224

出　　处：《吉林农业大学学报》2005年第3期323-327,共5页Journal of Jilin Agricultural University

基　　金：国家自然科学基金资助项目(39970539)

摘　　要：利用200只6月龄、18月龄辽宁绒山羊母羊的皮肤样品,分析了年龄、出生类型、母亲年龄等非遗传因素对毛囊性状的影响,估计了毛囊性状的遗传力及其与产绒量、体重、绒直径的表型相关和遗传相关。结果表明:除次级毛囊初级毛囊(S P)值以外其它毛囊性状随年龄的增长变化显著(P<0 01);除次级毛囊密度以外,其它性状在出生类型间无显著差异(P>0 05)。S P值、次级毛囊密度、初级毛囊内径在母亲年龄间差异极显著(P<0 01)。S/P值、次级毛囊密度、初级毛囊密度的遗传力分别为0 534,0 137,0 160,次级毛囊外径、初级毛囊外径、次级毛囊内径、初级毛囊内径、次级毛囊深度和初级毛囊深度的遗传力分别为0 584,0 080,0 187,0 496,0 002和0 204。这些毛囊性状与生产性能的表型相关都较低。S/P值与产绒量、体重、绒直径的遗传相关系数分别为0 680,0 423,-0 343,次级毛囊外径与产绒量、绒直径的遗传相关系数分别为0 450和0 489。认为辽宁绒山羊的S P值受非遗传因素影响较小,遗传力高、与生产性能的遗传相关高,在辽宁绒山羊选育中是一个非常有意义的性状,选择高S P值,不仅能够提高产绒量,而且在辽宁绒山羊种群中其后代绒直径不会变粗。<Abstrcat> Effects of non-genetic factors on follicle traits and their genetic parameters were studied with skin specimen from two hundreds of Liaoning cashmere goats at 6 and 18 months using the half—sib correlation method. Apart from S/P, the other follicle traits changed significantly with the increase of age ((P<)0. 01); apart from secondary density (SD),there were no significant differences between birth types of other follicle traits. S/P, SD and internal diameter of primary (IDP)were different among different month ages (P<0. 01). Heritabili ties of S/P, SD, primary density (PD), external diameter of secondary (EDS), external diameter of primary (EDP), internal diameter of secondary (IDS), internal diameter of primary (IDP),depth of secondary (DS) and depth of primary (DP) were 0.534, 0.137, 0.160, (0.584,) 0.080, 0.187, 0.496, 0.002 and　0.204. respectively. Their phenotypic correlation coefficients with performance traits were weak. Genetic correlation coefficents of S/P with down weight,body weight,and cashmere diameter were 0.680, 0.423 and -0.343, respectively,those of EDP with down weight and cashmere diameter were 0.450 and 0.489, respectively. It was concluded that S/P is a useful trait in goat breeding, due to less effects of non-genetic factors on it, high heritability and high genetic correlation with performances,and selecting high S/P can not only increase down weight,but also solve the concerned problem that Liaoning cashmere goat has coarser down.

关 键 词：辽宁绒山羊 毛囊性状 遗传参数 非遗传因素 

分 类 号：S827.2[农业科学—畜牧学]