Multivariate analysis of test day milk yields of British Holstein-Friesian heifers using Gibbs sampling

被引:8
作者
Firat, MZ
Theobald, CM
Thompson, R
机构
[1] UNIV EDINBURGH,DEPT MATH & STAT,EDINBURGH EH9 3JZ,MIDLOTHIAN,SCOTLAND
[2] ROSLIN INST,ROSLIN EH25 6PS,MIDLOTHIAN,SCOTLAND
来源
ACTA AGRICULTURAE SCANDINAVICA SECTION A-ANIMAL SCIENCE | 1997年 / 47卷 / 04期
关键词
genetic and phenotypic variance matrices; heritability; multivariate half-sib sire model; test day milk records;
D O I
10.1080/09064709709362390
中图分类号
S8 [畜牧、 动物医学、狩猎、蚕、蜂];
学科分类号
0905 ;
摘要
Estimates and posterior distributions of genetic and phenotypic variance matrices for test day milk records are obtained for 23 873 British Holstein-Friesian heifers, the progeny of 40 proven and 649 unproven sires, using restricted maximum likelihood (REML) and Gibbs sampling methods with two different prior specifications in a multivariate sire model. Results from the two methods are then compared. The REML estimates and posterior expectations of heritability and individual test day records range from 0.28 to 0.42. Generally, heritabilities for test day records are lowest at the start and highest in the second half of the lactation. Estimates of genetic correlations between test day milk yields range from 0.59 to 0.99, whilst those of phenotypic correlations are between 0.30 and 0.76, the correlations being highest for adjacent tests. Bayesian inferences are more informative, but require much more computer time.
引用
收藏
页码:221 / 229
页数:9
相关论文
共 15 条
[1]  
AURAN T, 1973, Acta Agriculturae Scandinavica, V23, P189
[2]  
*BRIT STAND I, 1972, 4866 BRIT STAND I, P12
[3]   STUDIES ON LACTATION YIELD AND INDIVIDUAL TEST-DAY YIELDS OF SWEDISH DAIRY-COWS .1. ENVIRONMENTAL INFLUENCE AND DEVELOPMENT OF ADJUSTMENT FACTORS [J].
DANELL, B .
ACTA AGRICULTURAE SCANDINAVICA, 1982, 32 (01) :65-81
[4]  
Firat MZ, 1997, ACTA AGR SCAND A-AN, V47, P213, DOI 10.1080/09064709709362389
[5]  
FIRAT MZ, 1995, THESIS EDINBURGH U E, P12
[6]   SAMPLING-BASED APPROACHES TO CALCULATING MARGINAL DENSITIES [J].
GELFAND, AE ;
SMITH, AFM .
JOURNAL OF THE AMERICAN STATISTICAL ASSOCIATION, 1990, 85 (410) :398-409
[7]   A REPARAMETERIZATION OF A GENETIC SELECTION INDEX TO LOCATE ITS SAMPLING PROPERTIES [J].
HAYES, JF ;
HILL, WG .
BIOMETRICS, 1980, 36 (02) :237-248
[8]  
Henderson Harold V., 1979, Can J Stat-Revue Can De Statistique, V7, P65, DOI DOI 10.2307/3315017
[9]   ESTIMATES OF GENETIC-PARAMETERS FOR 1ST LACTATION TEST DAY PRODUCTION OF AUSTRALIAN BLACK AND WHITE COWS [J].
MEYER, K ;
GRASER, HU ;
HAMMOND, K .
LIVESTOCK PRODUCTION SCIENCE, 1989, 21 (03) :177-199