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大约克夏猪繁殖与生长发育性状遗传参数的估测研究
Study on the Estimation of Genetic Parameters of the Reproductivity and growth-development Traits in Yorkshire
【作者】 杨再汉;
【作者基本信息】 湖南农业大学 , 动物遗传育种与繁殖, 2001, 硕士
【摘要】 本研究以衡阳某种猪场不同年度的大约克夏猪群为对象。采用父系半同胞相关法、全同胞相关法、混合家系法和单元内同胞相关法,对1994、1995、1996和1997年四个年度的大约克夏猪繁殖和生长发育性状遗传力进行估测,并且对这四种方法进行比较。还采用父系半同胞相关法估测了大约克夏猪繁殖性状间、生长发育性状间的表型相关和遗传相关,结果表明四种方法所估测的窝产仔数、活产仔数、初生窝重、初生个体重、21日龄活仔数、21日龄窝重、21日龄个体重、35日龄活仔数、35日龄窝重和35日龄个体重的遗传力值大多数在0.1-0.3之间。35日龄窝重与其它各性状间呈强正遗传相关(p<0.05或p<0.01)。采用四种方法估测的180日龄体长、胸围、体高、腿臀围、腹围、背膘厚、体重以及60-180日龄间平均日增重的遗传力值大多在0.2-0.6之间。且180日龄体重与其它各性状间呈强正遗传相关(p<0.05或p<0.01)。根据相关分析结果,为提高大约克夏猪的繁殖性能和生长速度,把35日龄窝重和180日龄体重作为主选性状,预期可获得较好的效果。
【Abstract】 Study on the Estimation of Genetic Parameters of the Reproductivity and growth梔evelopment Traits in Yorkshire ABSTRACT Yorkshire (Large White) swine groups of various years in one of Hengyang Swine Farm were investigated in this paper. The method of half梥ib correlation in sire, full梥ib correlation, mixed families and sib analysis within units were take to estimate the heritabilities of reproductivity, growth梔evelopment traits of Yorkshire swine in 1994, 1995, 1996 and 1997. Besides these four methods were compared in this paper. The phenotypic and genetic correlation among reproductivity traits, and those among growth and development traits of Yorkshire swine were estimated by means of the method of half梥ib correlation in sire. The results showed that the heritabilities estimation by four methods for litter size~ number born alive~ litter birth weight~. average birth weight~. litter size at 21d. litter weight at 21d~. average weight at 21d.. litter size at 35d~ litter weight at 35d.. average weight at 35d were from 0.1 to 0.3. The genetic correlations between litter weight at 35d and other reproductivity traits were strongly postive (p<O.05 or p<O.Ol). The heritabilities estimation by four methods for body length... chest girth~ withers height circumference of leg and hip~. abdominal girth~. back fat thickness~ average daily gain weight from 60d to 180d. weight at 180d were from 0.2 to 0.6. The genetic correlations between weight at I 80d and other growth-development traits were strongly postive (p<O.O5 or p<O.O I). Based on the correlation analysis, it is sugested that a great progress can be made for reproductivity and growth-development traits, if litter weight at 35d and weight at 180d are selected as the main traits. Yang ZaiHan (Animal Genetic Breeding & Reproduction) Directed by Prof. Shi QiShun
【Key words】 reproductivity traits; growth-development traits; heritability; genetic correlation; Yorkshire.;
- 【网络出版投稿人】 湖南农业大学 【网络出版年期】2002年 01期
- 【分类号】S828.3
- 【下载频次】200