增长曲线和料效率特征的遗传参数估计在日本 Quail 的特征
Ebru Kaya Başar1, Doğan Narinç2
1Statistical Consulting Application and Research Center, Akdeniz University, Antalya 07100, Turkey.
Animals : an open access journal from MDPI
|October 27, 2023
概括
日本的体重特征的遗传概率估计很高,而料效率特征的遗传概率很低. 遗传相关性表明,为了提高料转换效率,选择过程中存在潜在的约束.
科学领域:
- 动物遗传学动物遗传学
- 量化遗传学 量化遗传学
- 禽畜科学 禽畜科学 禽畜科学
背景情况:
- 了解遗传参数对于有效的动物育种计划至关重要.
- 日本是一种重要的家禽研究模型生物.
- 生长曲线参数和料效率是畜牧业的关键经济特征.
研究的目的:
- 为了估计每周体重的遗传性,Gompertz生长曲线参数,以及日本的料效率.
- 为了确定这些特征之间的遗传相关性.
- 在种群中的基因改进策略中提供信息.
主要方法:
- 利用了700只日本的血统数据.
- 单独测量每周的体重和料消耗量.
- 估计使用非线性回归的Gompertz增长模型参数.
- 使用贝叶斯推理 (吉布斯采样器) 分析了多特征方差-共方差.
主要成果:
- 对于每周体重的高遗传率估计 (0.590.61).
- 在料摄入 (0.230.37) 和料转化效率 (0.230.37) 中,具有适度的遗传性.
- 对于戈珀茨参数 (0.370.47) 的中度遗传性.
- 料摄入量与体重 (0.280.49) 之间的积极,中度的遗传相关性.
- 在料转化效率和体重 (0.520.83) 之间存在积极的,强烈的遗传相关性.
结论:
- 料转化效率与体重之间的中等负遗传关系可能会限制选择的进展.
- 在选择标准中包括成熟体重参数 (非对称体重) 可能会提高总遗传收益,因为它与料转换效率的遗传相关性很弱.
相关概念视频
Background and Environment Affect Phenotype
6.5K
Although the genetic makeup of an organism plays a major role in determining the phenotype, there are also several environmental factors, such as temperature, oxygen availability, presence of mutagens, that can alter an organism’s phenotype.
An example of how genetic background affects phenotype can be seen in horses. The Extension gene in horses is responsible for their coat color. A wild-type gene (EE) produces black pigment in the coat, while a mutant gene (ee) produces red pigment. A...
An example of how genetic background affects phenotype can be seen in horses. The Extension gene in horses is responsible for their coat color. A wild-type gene (EE) produces black pigment in the coat, while a mutant gene (ee) produces red pigment. A...
6.5K
Parametric Survival Analysis: Weibull and Exponential Methods
450
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...
450
Oxygen Requirements and Growth Patterns
26
Microorganisms exhibit diverse oxygen requirements and growth patterns driven by their metabolic strategies and environmental adaptations. Oxygen, while essential for many organisms, can also be toxic under certain conditions, shaping how microorganisms grow and survive.Oxygen Requirements of MicroorganismsMicroorganisms are classified based on their ability to use or tolerate oxygen:Obligate aerobes like Mycobacterium tuberculosis need oxygen for energy production, as it serves as the terminal...
26
Heritability
206
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"...
206
Distributions to Estimate Population Parameter
4.1K
The accurate values of population parameters such as population proportion, population mean, and population standard deviation (or variance) are usually unknown. These are fixed values that can only be estimated from the data collected from the samples. The estimates of each of these parameters are sample proportion, the sample mean, and sample standard deviation (or variance). To obtain the values of these sample statistics, data are required that have particular distribution and central...
4.1K
Bacterial Growth Curve
54
The bacterial growth curve is a fundamental concept in microbiology that describes the dynamics of bacterial population growth in a closed system with controlled environmental conditions, such as temperature and nutrient availability. This curve is divided into four distinct phases: lag, log (exponential), stationary, and death phases, each reflecting a unique stage of bacterial adaptation and growth. During the lag phase, bacteria acclimate to their surroundings by synthesizing essential...
54


