Genetic parameters for milk, growth, and reproductive traits in Guzera cattle under tropical conditions

被引：6
|
作者：
Brito, Lais Costa [1 ]
Peixoto, Maria Gabriela Campolina Diniz [2 ]
Carrara, Eula Regina [1 ]
Fonseca e Silva, Fabyano [1 ]
Ventura, Henrique Torres [3 ]
Bruneli, Frank Angelo Tomita [2 ]
Lopes, Paulo Savio [1 ]
机构：
[1] Univ Fed Vicosa, Dept Anim Sci, Vicosa, MG, Brazil
[2] Embrapa Dairy Cattle, Juiz De Fora, MG, Brazil
[3] Brazilian Assoc Zebu Breeders, Uberaba, MG, Brazil
来源：
TROPICAL ANIMAL HEALTH AND PRODUCTION | 2020年 / 52卷 / 05期
关键词：
Age at first calving; Bayesian inference; Genetic correlation; Zebu cattle; Growth; Milk yield; DUAL-PURPOSE CATTLE; WEANING WEIGHT; YIELD; AGE; ASSOCIATION; INDEXES; PRICE;
D O I：
10.1007/s11250-020-02255-0
中图分类号：
S8 [畜牧、 动物医学、狩猎、蚕、蜂];
学科分类号：
0905 ;
摘要：
This study aimed to estimate the genetic parameters of milk (305-day milk yield (MY305)), growth (weaning weight (WW), yearling weight (YW), and weight at 550 days (W550)), and reproductive (age at first calving (AFC)) traits in Guzera cattle by using Bayesian multiple-trait models. Systematic effects included sex and age at calving for the growth and milk traits, respectively. The additive genetic and contemporary groups (herd and year and season of birth) were included as random effects. Additionally, maternal genetic and permanent effects were also included as random effects for the WW. The heritability estimates were 0.29 (MY305), 0.42 (WW), 0.49 (YW), 0.56 (W550), and 0.25 (AFC). The genetic correlations among the growth traits were higher than 0.83; between the MY305 and WW, MY305 and YW, and MY305 and W550, the genetic correlations were 0.25, 0.32, and 0.36, respectively. The AFC was negatively correlated with the milk and growth traits. These results suggest the viability and potential of the joint selection for milk, beef, and reproductive traits in Guzera cattle.
引用
收藏
页码：2251 / 2257
页数：7
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