Direct and maternal variances and covariances and maternal phenotypic effects on preweaning growth of beef cattle.
作者： R.J.C. Cantet , D. D. Kress , D. C. Anderson , D. E. Doornbos , P. J. Burfening
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摘要: Birth weights (BW) and weaning (WW) of 4,423 non-creep-fed Hereford calves were used to estimate direct maternal sources variation phenotypic effects (fm). Seventeen different (co)variances among relatives estimated through Henderson's Method III restricted maximum likelihood procedures. Direct fm evaluated by multiple regression Estimates h2 for BW WW .28 respectively, the paternal half-sib procedure .45 .88, based on full-sibs. Repeatability estimates .21 .30 WW. Heritabilities offspring dam sire .06 WW, respectively. Negative correlations found between solutions additive genetic (rG). rG ranged from -.86 -1.05 -.57 -.79 heritability (h2o), (h2m) total (h2T) .16 .27, .18 .63 -.02 .05 .26 .32, .27 .67 .10 .20 Dominance affected both Values -.15 -.25 (path coefficient phenotypes daughter). These results indicated that selection response would be decreased due negative correlation effects.
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sci-hub.se 参考文章(26)
J. K. Bertrand, L. L. Benyshek, Variance and Covariance Estimates for Maternally Influenced Beef Growth Traits1,2 Journal of Animal Science. ,vol. 64, pp. 728- 734 ,(1987) , 10.2527/JAS1987.643728X
P. J. Burfening, D. D. Kress, R. L. Friedrich, Calving ease and growth rate of Simmental-sired calves. III. Direct and maternal effects. Journal of Animal Science. ,vol. 53, pp. 1210- 1216 ,(1981) , 10.2527/JAS1981.5351210X
L. D. Van Vleck, David St. Louis, J. I. Miller, Expected Phenotypic Response in Weaning Weight of Beef Calves from Selection for Direct and Maternal Genetic Effects Journal of Animal Science. ,vol. 44, pp. 360- 367 ,(1977) , 10.2527/JAS1977.443360X
M. G. Bulmer, The Effect of Selection on Genetic Variability The American Naturalist. ,vol. 105, pp. 201- 211 ,(1971) , 10.1086/282718
Robert Osborne, W. S. B. Paterson, XXIV.—On the Sampling Variance of Heritability Estimates derived from Variance Analyses Proceedings of The Royal Society B: Biological Sciences. ,vol. 64, pp. 456- 461 ,(1952) , 10.1017/S0080455X0000998X
R.W. Everett, W.T. Magee, Maternal Ability and Genetic Ability of Birth Weight and Gestation Length Journal of Dairy Science. ,vol. 48, pp. 957- 961 ,(1965) , 10.3168/JDS.S0022-0302(65)88368-0
B. W. KENNEDY, C. R. HENDERSON, COMPONENTS OF VARIANCE OF GROWTH TRAITS AMONG HEREFORD AND ABERDEEN ANGUS CALVES Canadian Journal of Animal Science. ,vol. 55, pp. 493- 502 ,(1975) , 10.4141/CJAS75-061
L.J. Fisher, C.J. Williams, Effect of environmental factors and fetal and maternal genotype on gestation length and birth weight of Holstein calves. Journal of Dairy Science. ,vol. 61, pp. 1462- 1467 ,(1978) , 10.3168/JDS.S0022-0302(78)83750-3
G. A. F. Seber, Linear regression analysis ,(1977)
R. I. Jennrich, P. F. Sampson, Newton-Raphson and Related Algorithms for Maximum Likelihood Variance Component Estimation Technometrics. ,vol. 18, pp. 11- 17 ,(1976) , 10.1080/00401706.1976.10489395