料事件,食和料效率特征的遗传视角 在 Bos taurus indicus 牛肉牛肉牛
Júlia de Paula Soares Valente1, Lúcio Flávio Macedo Mota1, Gustavo Roberto Dias Rodrigues1
1School of Agricultural and Veterinary Sciences, Sao Paulo State University, Jaboticabal, Sao Paulo, Brazil.
概括
尼罗尔牛的料事件和食特征显示弱遗传相关性,表明它们是不同的. 料事件特征更好地解释了与料效率的遗传联系,这表明更高效的动物吃得更快.
科学领域:
- 动物遗传学动物遗传学
- 动物营养 动物营养
- 量化遗传学 量化遗传学
背景情况:
- 电子料器通过记录料事件,提供了对动物养行为的洞察.
- 养行为也可以通过基于食的指标来分析,这与养事件数据不同.
- 了解这些独特的措施对于准确的牲畜遗传评估至关重要.
研究的目的:
- 为了估计Nellore牛的料事件和食特征的遗传参数.
- 确定料事件特征,食特征和料效率特征之间的遗传和表型相关性.
- 阐明不同养行为指标和整体料效率之间的遗传关系.
主要方法:
- 在Nellore牛中分析了六种料事件特征,六种食特征和三种料效率特征 (ADG,DMI,RFI).
- 在单步基因组BLUP框架内利用单变体和双变体动物模型.
- 使用料效率测试记录的数据估计遗传性和遗传/表型相关性.
主要成果:
- 料事件特征的遗传概率估计范围高达0.50 ± 0.05 (FTd),而食特征则高达0.45 ± 0.06 (MTd).
- 料事件和食特征之间的遗传相关性通常很弱.
- 像养率 (FR),养事件持续时间 (FED) 和每天养时间 (FTd) 这样的特征与剩余料摄入量 (RFI) 显示出中度的遗传相关性.
结论:
- 料事件和食特征代表着不同的遗传实体,因为它们之间的相关性很弱.
- 料事件特征对于理解与料效率相关的料行为遗传基础更有信息.
- 较高的料效率的内罗尔牛表现出更短的料访问和更快的每次事件和每天的进食模式.
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