[1]谢庄,程瑞禾,韩玉刚.湖羊公羊产羔效应的统计学分析[J].南京农业大学学报,1998,21(1):77-81.[doi:10.7685/j.issn.1000-2030.1998.01.015]
 Xie Zhuang,Cheng Ruihe,Han Yugang.Analysis on the lambing effects of rams in Hu sheep[J].Journal of Nanjing Agricultural University,1998,21(1):77-81.[doi:10.7685/j.issn.1000-2030.1998.01.015]
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湖羊公羊产羔效应的统计学分析()
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《南京农业大学学报》[ISSN:1000-2030/CN:32-1148/S]

卷:
21卷
期数:
1998年1期
页码:
77-81
栏目:
出版日期:
1998-02-28

文章信息/Info

Title:
Analysis on the lambing effects of rams in Hu sheep
作者:
谢庄程瑞禾韩玉刚
南京农业大学动物科技学院,浙江余杭湖羊种羊场
Author(s):
Xie Zhuang Cheng Ruihe Han Yugang
College of Animal Science, Technology, Nanjing Agric Univ, Nanjing 210095; Yuhang Hu Sheep Farm, Zhejiang Province
关键词:
湖羊 产羔性能 公羊效应 最小二乘法
Keywords:
Hu sheep lambing stock ram effect least square
分类号:
S826.3
DOI:
10.7685/j.issn.1000-2030.1998.01.015
文献标志码:
A
摘要:
分析了16头湖羊种公羊的548个女儿共计2631胎产羔记录,发现母羊每胎产羔数为1~5只的比例分别为15.17%,45.76%,32.15%,6.08%及0.84%。对不同胎次的产羔数作方差分析,结果表明,胎次间存在着显著差异。每胎产羔数与胎次的关系为:y=1.7648+0.2860x-0.0267x2,复相关指数为R2=0.9996。依据该回归方程计算出每胎产羔估计值,并以4,5,6,7胎的校正产羔值的简单平均数为基准,计算了各胎次的校正系数。应用次级样本含量不等的两因子最小二乘方差分析法估计种公羊的产羔效应值,表明种公羊间存在着繁殖性能方面的差异。
Abstract:
A total of 2 631 litter records from 548 daughters of 16 stock rams were analysed. The results showed that the ratio of 1 5 lambs per litter were 15.17%, 45.76%, 32.15%, 6.08% and 0.84% respectively. The significant defferences were existed in each litter by variance analysis. The parabola function was y=1.764 8+ 0.286 0x -0.026 7x 2 between the lambing number and litter, with muitiple correlation index R 2 =0.999 6. The lambing number per litter was estimated by this function and the correction factor each litter was calculated based on the simple mean values of 4th, 5th, 6th and 7th litter. The lambing effect values showed that the significant differences were existed between stock rams by the least square variance analysis.

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更新日期/Last Update: 1998-02-28