高繁殖力猪新品系HN的遗传分析

发布时间：2018-10-10 06:49

【摘要】：【目的】对高繁殖力猪新品系HN进行遗传评定.【方法】采用多性状动物模型BLUP法(最佳线性无偏预测法)和REML法(非求导约束最大似然法)对高繁殖力猪新品系HN繁殖性状的表型参数和遗传参数进行了估测.【结果】高繁殖力猪新品系HN繁殖性状的变异系数较小,在1.75%~6.42%之间;总产仔数、产活仔数、断奶存活仔数、有效乳头数、初生个体质量、初生窝质量、21日龄个体质量、21日龄窝质量、断奶个体质量和断奶窝质量的遗传力分别为0.160、0.091、0.112、0.072、0.167、0.170、0.116、0.119、0.202和0.114;总产仔数、产活仔数、断奶存活仔数与初生个体质量、21日龄个体质量、断奶个体质量的表性相关(-0.220、-0.121、-0.061、-0.249、-0.125、-0.099、-0.179、-0.057、-0.217)呈弱的负相关,其他繁殖性状间的表型相关和遗传相关都呈正相关,且断奶窝质量与其他繁殖性状间的表型相关和遗传相关均呈中等或强的正相关;总产仔数、产活仔数、断奶存活仔数、有效乳头数、初生个体质量、初生窝质量、21日龄个体质量、21日龄窝质量、断奶个体质量和断奶窝质量的世代遗传进展分别为0.000 440头/世代、0.001 019头世代、0.000 112头/世代、0.003 106对/世代、0.004 361kg/世代、0.000 115 kg/世代、0.002 620 kg/世代0.010 261 kg/世代、0.001 875 kg/世代和0.011 226kg/世代.【结论】各性状的表型参数变异系数较小,繁殖性状的遗传力符合一般规律,说明高繁殖力猪新品系HN已具有稳定的遗传基础,已达到选育的目标;在选育过程中,可以把总产仔数和断奶窝质量作为主选性状,用于选择高繁殖力个体.
[Abstract]:[objective] to evaluate the heredity of a new strain of high fecundity pig HN. [methods] A multi-trait animal model BLUP method (best linear unbiased prediction method) and REML method (non-derivation constraint maximum likelihood method) were used to evaluate the genetic characteristics of a new breed of high fecundity pig. The phenotypic and genetic parameters of reproductive traits of HN line were estimated. [results] the coefficient of variation of reproductive traits of HN, a new line of high fecundity pig, was small. Between 1.75% and 6.42%, total litter size, live litter size, weaning surviving litter size, effective nipple number, birth weight, nestling weight of 21-day-old individuals, litter weight of 21-day-old individuals, The heritability of weaning body weight and weaning litter weight were 0.160 0 / 0.091 / 0.120.072 / 0.167 / 0.170 / 0.1160.1 / 190.202 and 0.114, respectively. There was a weak negative correlation between the total litter size, the number of live litter, the number of surviving litter and the weight of the individual of 21 days old at the beginning of birth, and the apparent correlation between the weight of the weaning individual (-0.220) -0.121 ~ (-1) -0.061 ~ (-1) -0.125- 0.09 ~ (9) -0.179m ~ (-0.057) ~ 0.217). The phenotypic and genetic correlations among other reproductive traits were positive, and the phenotypic and genetic correlations between weaning litter quality and other reproductive traits were moderate or strong. The number of effective nipples, the weight of newborn individuals, the weight of 21 day old individuals and the weight of 21 days old nest, The genetic progress of weaning individual weight and weaning litter quality were 0.000 440heads / generation 0.000111x / generation 0.0003106pairs of 0.0004 361kg/ generation, 0.002620 kg/ generation 0.010 261kg/ generation and 0.010 261kg/ generation, respectively 0.003 106pairs / generation 0.004 kg/ generation, 0.010 kg/ generation, 0.000 kg/ generation, 0.0002620 kg/ generation, 0.010 kg/ generation, 0.000 kg/ generation and 0.000775 kg/ generation, respectively. [conclusion] the coefficient of variation of phenotypic parameters of each trait is small, The heritability of reproductive traits accords with the general rule, which indicates that the new line HN has a stable genetic basis and has reached the goal of breeding, and the total litter size and weaning litter quality can be taken as the main selection traits in the breeding process. Used to select individuals with high fecundity.
【作者单位】：甘肃农业大学动物科学技术学院;甘肃省现代养猪工程技术研究中心;甘肃农业大学图书馆;甘肃省武威和农牧业有限公司;甘肃省平川区畜牧兽医局;
【基金】：甘肃省科技重大专项项目“高繁殖力猪新品系选育研究”(092NKDA036)
【分类号】：S828

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