594
Genetic Parameter Estimation of Body Size and Birth Weight in Chinese Holstein Cows

Friday, August 22, 2014
Posters (The Westin Bayshore)
Xu Zhang , College of Animal Science and Technology, China Agricultural University, Beijing, China
Yachun Wang , College of Animal Science and Technology, China Agricultural University, Beijing, China
Gang Guo , BeijingSanyuan Lvhe Dairy Cattle Center, Beijing Sanyuan Breeding Technology Co., Beijing, China
Ying Yu , College of Animal Science and Technology, China Agricultural University, Beijing, China
Xizhi Li , BeijingSanyuan Lvhe Dairy Cattle Center, Beijing Sanyuan Breeding Technology Co., Beijing, China
Xinyu Wang , BeijingSanyuan Lvhe Dairy Cattle Center, Beijing Sanyuan Breeding Technology Co., Beijing, China
Fenghong Wang , BeijingSanyuan Lvhe Dairy Cattle Center, Beijing Sanyuan Breeding Technology Co., Beijing, China
Abstract Text:

Records from 42,337 Chinese Holstein cows, born between 2002 and 2010, were used to estimate (co)variance components and genetic parameters for hip height (HH), heart girth (HG) at 3 (HH3, HG3), 6 (HH6,HG6), 12 (HH12, HG12), 18 (HH18, HG18) and 24 (HH24, HG24) months of age, and birth weight (BW). (Co)variance components were estimated using multiple-trait animal model . The heritability estimates for BW was 0.24±0.03, for HHs ranged from 0.08±0.01 to 0.20±0.03, for HGs ranged from 0.08±0.01 to 0.13±0.03. Genetic correlation between BW and HHs ranged from 0.13±0.17 to 0.33±0.12, those were from 0.06±0.13 to 0.23±0.12 between BW and HGs. The results pointed out that body size are moderately inherited, and a heavier heifer tends to have better growth in her later life. 

Keywords:

dairy cattle

body size

birth weight

body measurement

genetics

See more of: Posters: Genetics of Trait Complexes: Growth and Development (Group 1)
See more of: Genetics of Trait Complexes: Growth and development
<< Previous Abstract | Next Abstract