Kaplon M J, Rothschild M F, Berger P J, Healey M
Dept. of Anim. Sci., Iowa State Univ., Ames 50011.
J Anim Sci. 1991 Jan;69(1):91-8. doi: 10.2527/1991.69191x.
Performance test records from on-farm tests of young Polish Large White boars and reproductive records of Polish Large White sows from 94 nucleus farms during 1978 to 1987 were used to estimate population parameters for the measured traits. The number of boar performance records after editing was 114,347 from 3,932 sires, 21,543 dams, 44,493 litters and 1,075 herd-year-seasons. Reproductive performance records of sows involved 41,080 litters from 2,348 sires, 18,683 dams and 1,520 herd-year-seasons. Both data sets were analyzed by using restricted maximum-likelihood programs. The model used for the performance records included fixed herd-year-seasons, random sires, dams and error effects, and covariances for the year of birth of sire and year of birth of dam. The model used for the reproduction data set was the same as the performance data with parity as an additional fixed effect. Estimated heritabilities were .27, .29, .26, .07, .06, .06 for average daily gain standardized to 180 d (ADG), backfat thickness standardized to 110 kg BW (BF), days to 110 kg (DAYS), litter size at birth born alive (NBA), litter size at 21 d (N21) and litter weight at 21 d (W21), respectively. Estimated common environmental effects for the same traits were .09, .10, .09, .06, .07 and .08, respectively. Genetic correlations were .25 (ADG and BF), -.99 (ADG and DAYS), -.21 (BF and DAYS), .91 (NBA and N21), .68 (NBA and W21) and .80 (N21 and W21). The respective phenotypic correlations were .23, -.99, -.20, .88, .75, .86. These population parameters for Polish Large White pigs are similar to those for breeds in other countries.
利用1978年至1987年期间94个核心猪场波兰大白猪幼猪的农场性能测试记录以及波兰大白母猪的繁殖记录，来估计所测性状的群体参数。编辑后的公猪性能记录数量为114347条，来自3932头公猪、21543头母猪、44493窝仔猪以及1075个畜群 - 年 - 季。母猪的繁殖性能记录涉及来自2348头公猪、18683头母猪和1520个畜群 - 年 - 季的41080窝仔猪。两个数据集均使用限制最大似然程序进行分析。用于性能记录的模型包括固定的畜群 - 年 - 季、随机的公猪、母猪和误差效应，以及公猪出生年份和母猪出生年份的协方差。用于繁殖数据集的模型与性能数据相同，但胎次作为额外的固定效应。对于标准化到180日龄的平均日增重（ADG）、标准化到110千克体重的背膘厚度（BF）、达到110千克体重的天数（DAYS）、出生时活产仔猪数（NBA）、21日龄仔猪数（N21）和21日龄仔猪体重（W21），估计的遗传力分别为0.27、0.29、0.26、0.07、0.06、0.06。相同性状的估计共同环境效应分别为0.09、0.10、0.09、0.06、0.07和0.08。遗传相关性分别为0.25（ADG和BF）、 - 0.99（ADG和DAYS）、 - 0.21（BF和DAYS）、0.91（NBA和N21）、0.68（NBA和W21）和0.80（N21和W21）。相应的表型相关性分别为0.23、 - 0.99、 - 0.20、0.88、0.75、0.86。波兰大白猪的这些群体参数与其他国家品种的参数相似。
