摘要
为研究内蒙古绒山羊不同毛被类型遗传,收集内蒙古白绒山羊种羊场1990—2014年间54 044只绒山羊毛长(自然长度)的重复数据记录,按照不同羊毛长度将绒山羊分为三个类型:短毛型(≤13cm,SSL)、中间型(13cm<羊毛长度≤22cm,ISL)和长毛型(>22cm,LSL)。对毛长进行基本统计分析,发现内蒙古绒山羊个体之间的羊毛长度存在很大的差异,毛长度在5~34cm之间,而且毛长的分布规律基本符合正态分布。采用WOMBAT软件的AIREML算法进行方差组分分析和遗传参数估计。结果表明短毛型、中间型和长毛型的遗传力分别是0.11、0.16和0.22,长毛型的遗传力高于短毛型和中间型,并且短毛型和中间型属于低遗传力,而长毛型属于中等遗传力。从遗传进展上看,三种类型的遗传趋势相一致,总体上呈上升趋势,并且三种类型毛长的平均育种值每年分别增加0.005 9、0.011 3和0.014 1cm。研究表明长毛型的遗传进展比中间型和短毛型的遗传进展快,所以选择长毛型的绒山羊可以加速毛长遗传进展,为与其相关的重要经济性状间接选择奠定理论基础。
The repetitive data of staple length （natural length） of 54 044 Inner Mongolia White Cashmere goats from 1990 to 2014were collected in a breeding farm. The staple rength of Inner Mongolian Cashmere goats were divided into three types：Short-staple length （413 cm,SSL）, intermediate-staple length （〉 13 cm and 422 cm, ISL） and long- staple length （〉22 cm,LSL）. After the basic statistical analysis of different hair length, it was found that there were significant differences in staple length among Inner Mongolia Cashmere goats. The staple length was ranged from 5 to 34 cm,and the distribution of staple length was consistent with the normal distribution. The average information restricted maximum likelihood （AIREML） method in a multivariate animal model on wombat software was used to analyze variance components and estimate the genetic parameters to reveal the staple length genetic regularity. The result showed that： the heritability of SSL, ISL and LSL were 0.11,0.16 and 0.22, respectively. The heritability of LSL was highest in three types. And the heritability of SSL and ISL belong to the low heritability,while the heritability of LSL was the moderate heritability. The genetic trends of all three types＇ staple length were consistent in both genetic progress and genetic progress. The result showed that LSL was most stable in the genetic progress. Genetic trends for SSL （0.005 9 cm/year）, ISL （0. 011 3 cm/year） and LSL（0. 014 1 cm/year） was positive during the period of breeding. The genetic progress of the LSL3 was the fastest among three types. $0, selecting of LSL3 could accelerate genetic progress. And this study lay the theoretical foundation for the indirect selection in other important economic traits.
出处
《中国农业大学学报》
CAS
CSCD
北大核心
2018年第4期53-59,共7页
Journal of China Agricultural University
基金
国家绒毛用羊现代农业产业技术体系(CARS-40-05)
国家公益性行业(农业)科研专项(201303059)
内蒙古自治区计划项目
关键词
绒山羊
毛长
遗传参数
遗传进展
Cashmere goats
staple length
genetic parameters
genetic change
