MAXIMUM LIKELIHOOD ESTIMATES OF PARAMETERS OF 1ST AND 2ND LACTATION MILK RECORDS

被引：41

作者：

ROTHSCHILD, MF ^{[1
]}

HENDERSON, CR ^{[1
]}

机构：

[1] CORNELL UNIV,DEPT ANIM SCI,ITHACA,NY 14853

来源：

JOURNAL OF DAIRY SCIENCE | 1979年 / 62卷 / 06期

关键词：

D O I：

10.3168/jds.S0022-0302(79)83360-3

中图分类号：

S8 [畜牧、动物医学、狩猎、蚕、蜂];

学科分类号：

0905 ;

摘要：

Variance and covariance components, heritabilities, and genetic and phenotypic correlations between first and second lactation milk records were estimated by Maximum Likelihood procedures. Data consisted of 423,314 first records and 339,182 selected second records completed in over 160,000 herd-year-seasons from daughters of 1,873 Holstein sires. Heritabilities of first and second milk records were .41 and .35. Genetic and phenotypic correlations were .91 and .56. Computational practicality and bias in estimation by Maximum Likelihood are discussed. © 1979, American Dairy Science Association. All rights reserved.

引用

页码：990 / 995

页数：6

共 19 条

[1] GENETIC AND PHENOTYPIC PARAMETERS FOR FIRST 3 LACTATIONS IN FRIESIAN COWS [J].