在使用贝叶斯方法的泽西杂交牛群中,伍德的哺乳曲线参数的遗传方面
Mokidur Rahman1, Hasan Baneh2, Indrajit Gayari1
1ICAR-National Dairy Research Institute, Eastern Regional Station, Kalyani, 741235, West Bengal, India.
The Journal of dairy research
|January 12, 2024
概括
这项研究估计了新泽西杂交牛的哺乳曲线特征的遗传参数. 结果显示出显著的遗传相关性,表明牛奶产量,峰值产量和持久性之间的关系.
科学领域:
- 动物遗传学和动物繁殖
- 乳制品科学 乳制品科学
- 量化遗传学 量化遗传学
背景情况:
- 了解哺乳曲线动态对于乳牛养殖和管理至关重要.
- 泽西杂交牛是重要的乳制品种群,它们的哺乳性能需要详细的遗传评估.
- 伍德的函数是描述哺乳曲线的广泛使用的模型.
研究的目的:
- 估计泽西杂交牛的哺乳曲线参数 ('a', 'b', 'c') 和特征 (峰值产量,峰值时间,持久性) 的遗传参数.
- 通过使用遗传关联来评估这些哺乳曲线特征之间的遗传和生理关系.
- 应用贝叶斯方法来对方差组件和遗传参数进行可靠的估计.
主要方法:
- 利用了33906个测试日牛奶产量的数据集,来自40年来1718只泽西杂交牛的哺乳记录.
- 通过高斯-牛顿算法 (SAS PROC NLIN) 使用伍德不完整的马函数模型估计的哺乳曲线参数和特征.
- 在贝叶斯框架内使用可重复性动物模型来估计差异组件和遗传参数.
主要成果:
- 哺乳曲线参数"a"",b"和"c"的遗传概率估计分别为0.18,0.09和0.11.
- 峰值产量 (y_max),峰值时间 (t_max) 和持久性 (P) 的遗传概率估计分别为0.24,0.12和0.15.
- 哺乳曲线参数和特征之间的遗传相关性在 - 0.75 到 0.95 之间,表明存在实质性的遗传关系.
结论:
- 该研究成功估计了新泽西杂交牛的哺乳曲线特征的关键遗传参数.
- 显著的遗传相关性表明,对一种特性的选择可以影响其他特征,影响整体的哺乳性能.
- 这些发现为旨在优化这种品种的牛奶产量和持久性的遗传改进计划提供了宝贵的见解.
相关概念视频
Heritability
201
Heritability is a statistical concept that measures the degree to which genetic differences among individuals contribute to trait variations within a population. It is a fundamental idea in genetics, often prone to misinterpretation. Heritability is expressed as a percentage, reflecting the proportion of variation in a specific trait across a population that can be linked to genetic differences. However, it's important to understand that heritability does not determine how "genetic"...
201
Pedigree Analysis
84.3K
Overview
84.3K
Punnett Squares
114.5K
Overview
114.5K
Behavioral Genetics and Its Designs
371
Behavior genetics explores how genetic inheritance influences human behavior. It focuses on how genes, passed from parents to offspring, contribute to the development of behavioral traits and tendencies. This branch of genetics seeks to understand the complex interplay between inherited genetic factors and environmental influences in shaping our behaviors.
The primary methodologies used in behavior genetics include family studies, twin studies, and adoption studies, each providing unique...
The primary methodologies used in behavior genetics include family studies, twin studies, and adoption studies, each providing unique...
371
Genetic Drift
39.8K
Natural selection—probably the most well-known evolutionary mechanism—increases the prevalence of traits that enhance survival and reproduction. However, evolution does not merely propagate favorable traits, nor does it always benefit populations.
39.8K
Parametric Survival Analysis: Weibull and Exponential Methods
438
Parametric survival analysis models survival data by assuming a specific probability distribution for the time until an event occurs. The Weibull and exponential distributions are two of the most commonly used methods in this context, due to their versatility and relatively straightforward application.
Weibull Distribution
The Weibull distribution is a flexible model used in parametric survival analysis. It can handle both increasing and decreasing hazard rates, depending on its shape parameter...
Weibull Distribution
The Weibull distribution is a flexible model used in parametric survival analysis. It can handle both increasing and decreasing hazard rates, depending on its shape parameter...
438


