SPECIFIC AND GENERAL COMBINING ABILITIES FOR PRODUCTION AND REPRODUCTION AMONG LINES OF HOLSTEIN CATTLE

被引:15
作者
BECKETT, RC
LUDWICK, TM
RADER, ER
HINES, HC
PEARSON, R
机构
[1] Department of Dairy Science, The Ohio Agricultural Research, and Development Center, The Ohio State University, Columbus
关键词
D O I
10.3168/jds.S0022-0302(79)83297-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
Six inbred lines of Holstein cattle were developed and reciprocally crossed to assess the importance of heterotic effects for yield and reproductive traits. Overall both yield and reproductive performance declined with inbreeding, but effects varied with different lines. In two of the lines milk yield increased during inbreeding. Regression coefficients for each percent of inbreeding ranged from +39 to –73 kg of milk. Production for estimates of general combining abilities for the different lines ranged from 5799 to 7075 kg of milk indicating the genetic variability available for selection. Some evidence was found for specific combining ability for reproductive performance but none for yield traits. Reciprocal differences were observed only for reproductive performance involving two of the line combinations. Heterosis was present for milk fat percentage, persistency of lactation, and reproductive performance. Effects of dominant genes appeared to be of minor importance in determining yield traits, and the possibility of nicking between lines for production traits, while not excluded, was of low likelihood. While mild inbreeding sometimes may produce genetic improvement, a breeding program based on additive genetic theory offers the best opportunities for raising productive performance. © 1979, American Dairy Science Association. All rights reserved.
引用
收藏
页码:613 / 620
页数:8
相关论文
共 24 条
[1]   INBREEDING WITHIN AN ARTIFICIALLY BRED DAIRY CATTLE POPULATION [J].
ALLAIRE, FR ;
HENDERSO.CR .
JOURNAL OF DAIRY SCIENCE, 1965, 48 (10) :1366-&
[2]   Combining Abilities for Size of Linecross and Linebred Holstein Heifers [J].
Brum, E. ;
Ludwick, T. ;
Rader, E. ;
Richardson, D. ;
Davis, D. ;
Crist, W. ;
Long, D. .
JOURNAL OF DAIRY SCIENCE, 1970, 53 (12) :1779-1782
[3]  
BRUM EW, 1963, J DAIRY SCI, V46, P619
[4]  
CASTLE WE, 1919, NATL ACAD SCI P, V5, P428
[5]  
DAVIS HP, 1953, 2 NEBR AGR EXP STA M
[6]  
DAYTON AD, 1967, THESIS MICHIGAN STAT
[7]  
FOHRMAN MH, 1954, USDA1074 TECH B
[8]  
GAALAAS RF, 1962, J DAIRY SCI, V45, P671
[9]   ANALYSIS AND INTERPRETATION OF VARIETY CROSS DIALLEL AND RELATED POPULATIONS [J].
GARDNER, CO ;
EBERHART, SA .
BIOMETRICS, 1966, 22 (03) :439-&
[10]  
HANSSON A., 1961, Kungliga Lantbrukshogskolans Annaler, V27, P287