在西班牙荷尔斯坦牛的乳头健康特征的遗传评估
M A Pérez-Cabal1, J López-Paredes2, I Cervantes1
1Departamento de Producción Animal, Universidad Complutense de Madrid, 28040 Madrid, Spain.
Journal of dairy science
|September 29, 2024
概括
这项研究估计了乳牛临床乳腺炎 (CM) 和体细胞评分 (SCS) 的遗传参数. 在双变体分析中将SCS与CM数据结合起来,显著改善了乳健康的遗传评估.
科学领域:
- 动物遗传学动物遗传学
- 乳制品科学 乳制品科学
- 动物育种 动物育种
背景情况:
- 临床乳腺炎 (CM) 和体细胞评分 (SCS) 是乳牛乳腺健康的关键指标.
- 精确的遗传评估对于通过选择性育种改善乳健康至关重要.
- 了解CM和SCS之间的遗传关系可以增强育种策略.
研究的目的:
- 估计临床乳腺炎 (CM) 和体细胞分数 (SCS) 特征的遗传参数.
- 用单变体和双变体 (CM-SCS) 分析对CM特征进行基因评估的性能进行比较.
主要方法:
- 数据使用"阴茎健康黄金标准"进行了统一.
- 分析了6个CM和6个SCS特征,考虑了3个哺乳分类和2个哺乳期.
- 采用了线性混合动物模型,结合了与健康相关的共变量和固定效应.
主要成果:
- 对CM的遗传概率估计在0.01 (早期哺乳期) 到0.03-0.05 (晚期哺乳期) 之间.
- 对SCS的遗传概率估计范围从0.06到0.16.
- 双变CM-SCS分析大大提高了母的估计繁殖值 (EBV) 的可靠性 (增加7%-28%).
结论:
- 第一次哺乳期的体细胞评分可以补充临床乳腺炎数据,以改善乳腺健康的遗传评估.
- 使用CM和SCS数据的双变量分析与单变量方法相比,在 sire 选择方面提供了更高的准确性.
- CM和SCS特征之间的遗传相关性表明了同时进行遗传改进的潜力.
更多相关视频
07:46Author Spotlight: Improving Beef Cattle Nutrition and Production with a Focus on Feed Efficiency and Meat Quality Traits Through Advanced Biochemical and Molecular Assays
Published on: July 12, 2024
470
13:00Intranasal Immunization and Milk Collection in Studies of Maternal Immunization in New Zealand White Rabbits Oryctolagus cuniculus
Published on: July 31, 2021
3.5K
相关概念视频
Incomplete Dominance
22.0K
Gregor Mendel's work (1822 - 1884) was primarily focused on pea plants. Through his initial experiments, he determined that every gene in a diploid cell has two variants called alleles inherited from each parent. He suggested that amongst these two alleles, one allele is dominant in character and the other recessive. The combination of alleles determines the phenotype of a gene in an organism.
22.0K
Punnett Squares
113.9K
Overview
113.9K
Heritability
194
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"...
194
Trihybrid Crosses
23.2K
Trihybrid Crosses
Some of Mendel’s crosses examined three pairs of contrasting characteristics. Such a cross is called a trihybrid cross. A trihybrid cross is a combination of three individual monohybrid crosses. For example, plant height (tall vs. short), seed shape (round vs. wrinkled), and seed color (yellow vs. green).
The F1 generation plants of a trihybrid cross are heterozygous for all three traits and produce eight gametes. Upon self-fertilization, these gametes have an equal...
Some of Mendel’s crosses examined three pairs of contrasting characteristics. Such a cross is called a trihybrid cross. A trihybrid cross is a combination of three individual monohybrid crosses. For example, plant height (tall vs. short), seed shape (round vs. wrinkled), and seed color (yellow vs. green).
The F1 generation plants of a trihybrid cross are heterozygous for all three traits and produce eight gametes. Upon self-fertilization, these gametes have an equal...
23.2K
Monohybrid Crosses
229.8K
Overview
229.8K
Genetic Lingo
101.8K
Overview
101.8K
