Heritability and genetic correlation of body weight and Kleiber ratio in Limousin and Charolais beef cattle breeds

Animal

C.H.M. Malhado¹  M.C. Fabbri²  A. Crovetti³  P.L.S. Carneiro³  J.A. Carrillo-Tabakman⁴  R. Bozzi⁵  S. Biffani⁵  M.P.G. Rezende⁵ 

[1] Corresponding author.;CDCB – Council on Dairy Cattle Breeding, 20716 MD, United States;DAGRI – Animal Science Section, University of Firenze, 50144 Firenze, Italy;Institute of Agricultural Biology and Biotechnology-CNR, 20133 Milano, Italy;State University of Southwestern Bahia, 45205-490 Jequié, Bahia, Brazil;

关键词: Bayesian inference;    Genetic parameters;    Growth;    Growth efficiency;    Metabolic weight;   

DOI  :  

来源: DOAJ

【 摘 要 】

Reducing the environmental impact of livestock production is now indispensable and genetic selection can be of great support for this purpose. Measures that can identify high body growth at low maintenance costs in production animals are particularly useful since resources have been increasingly limited. Therefore, the goal of this study was to estimate genetic parameters for BW and Kleiber ratio (KR) in 210-day-old and 365-day-old Charolais and Limousin breeds. A database comprising animals born from 1999 to 2018 was used in a multitrait model applying Bayesian inference. The heritability for BW is high in Charolais (0.39 and 0.42 for BW210 and BW365, respectively) and moderate in Limousin (0.22), indicating possible genetic gains for BW in both breeds. The genetic variability of KR should also allow satisfactory genetic gains. In addition, the genetic correlation between BW and KR ranged from low to moderate. Thus, selection over KR should have no effects on BW, showing that high body growth can be obtained without changes in efficiency.

【 授权许可】

Unknown