GENETIC TRENDS FOR MILK-PRODUCTION IN THE SPANISH HOLSTEIN POPULATION

被引：3

作者：

CANON, J ^{[1
]}

MUNOZ, A ^{[1
]}

机构：

[1] FAC VET MURCIA,DPTO PROD ANIM,E-30071 MURCIA,SPAIN

来源：

JOURNAL OF ANIMAL BREEDING AND GENETICS-ZEITSCHRIFT FUR TIERZUCHTUNG UND ZUCHTUNGSBIOLOGIE | 1991年 / 108卷 / 01期

关键词：

D O I：

10.1111/j.1439-0388.1991.tb00154.x

中图分类号：

S8 [畜牧、动物医学、狩猎、蚕、蜂];

学科分类号：

0905 ;

摘要：

Genetic trends for milk yield were calculated by regressing the genetic merit of cows and sires on time. Estimates of genetic merit were obtained through an animal model with all known relationships taken into account and genetic groups assigned to unknown parents. Genetic trends for milk yield were negative and ranged from -15 kg/year for the genetic merits of bulls to -112 kg/year for the genetic merit of cows.

引用

页码：41 / 47

页数：7

共 16 条

[1]

CANON J, 1989, ITEA, V82, P3

[2]

CANON J, 1989, Z TIERZUCHTG ZUCHTGB, V106, P335

[3]

Dickerson GE, 1944, J AGRIC RES, V69, P0459

[4] ENVIRONMENTAL AND GENETIC TRENDS IN PRODUCTION AND THEIR EFFECTS ON SIRE EVALUATION [J].