Genetic parameters for somatic cell score and production traits in the first three lactations of Chinese Holstein cows
作者： Fu-ping ZHAO , Gang GUO , Ya-chun WANG , Xiang-yu GUO , Yuan ZHANG
DOI: 10.1016/S2095-3119(14)60758-9
关键词:
摘要: Abstract The objectives of this study were to estimate genetic parameters lactation average somatic cell scores (LSCS) and examine associations between LSCS production traits in the first three lactations Chinese Holstein cows using single-parity multi-trait animal model repeatability model. There totally 273 605 records with calving from 2001 2012. Heritability estimates for ranged 0.144 0.187. Genetic correlations 305 days milk, protein percentage fat −0.079, −0.082 −0.135, respectively. Phenotypic correlation milk yield was negative (−0.103 −0.190). or highly negative. favorable. Heritabilities decreased increase parity, whereas heritability increased parity.
elsevier.com
sci-hub.se 参考文章(15)
G.J.T. Swanson, R.A. Mrode, Genetic and statistical properties of somatic cell count and its suitability as an indirect means of reducing the incidence of mastitis in dairy cattle Animal Breeding Abstracts (United Kingdom). ,(1996)
Pascal Leroy, Johann Detilleux, D. Volckaert, Alternatives use of somatic cell counts in genetic selection for mastitis resistance Interbull Bulletin. pp. 34- ,(1997)
E. Søndergaard, M.K. Sørensen, I.L. Mao, J. Jensen, Genetic parameters of production, feed intake, body weight, body composition, and udder health in lactating dairy cows Livestock Production Science. ,vol. 77, pp. 23- 34 ,(2002) , 10.1016/S0301-6226(02)00023-4
Jørgen Ødegård, Gunnar Klemetsdal, Bjørg Heringstad, Variance components and genetic trend for somatic cell count in Norwegian Cattle Livestock Production Science. ,vol. 79, pp. 135- 144 ,(2003) , 10.1016/S0301-6226(02)00148-3
G. Banos, G.E. Shook, Genotype by environment interaction and genetic correlations among parities for somatic cell count and milk yield. Journal of Dairy Science. ,vol. 73, pp. 2563- 2573 ,(1990) , 10.3168/JDS.S0022-0302(90)78942-4
R. Rupp, D. Boichard, Genetic parameters for clinical mastitis, somatic cell score, production, udder type traits, and milking ease in first lactation Holsteins. Journal of Dairy Science. ,vol. 82, pp. 2198- 2204 ,(1999) , 10.3168/JDS.S0022-0302(99)75465-2
J.I. Weller, E. Ezra, G. Leitner, Genetic Analysis of Persistency in the Israeli Holstein Population by the Multitrait Animal Model Journal of Dairy Science. ,vol. 89, pp. 2738- 2746 ,(2006) , 10.3168/JDS.S0022-0302(06)72350-5
M. Haile-Mariam, M.E. Goddard, P.J. Bowman, Estimates of Genetic Parameters for Daily Somatic Cell Count of Australian Dairy Cattle Journal of Dairy Science. ,vol. 84, pp. 1255- 1264 ,(2001) , 10.3168/JDS.S0022-0302(01)74587-0
R.A Mrode, G.J.T Swanson, Estimation of genetic parameters for somatic cell count in the first three lactations using random regression Livestock Production Science. ,vol. 79, pp. 239- 247 ,(2003) , 10.1016/S0301-6226(02)00169-0
G.E. Shook, M.M. Schutz, Selection on Somatic Cell Score to Improve Resistance to Mastitis in the United States Journal of Dairy Science. ,vol. 77, pp. 648- 658 ,(1994) , 10.3168/JDS.S0022-0302(94)76995-2