澳大利亚羔羊肉的柔软性:数据编辑,环境变异及其对遗传参数估计的影响
P Alexandri1, S F Walkom1, G E Gardner2
1AGBU, A Joint Venture of NSW Department of Primary Industries and University of New England, 2351 Armidale, Australia; Advanced Livestock Measurement Technologies project, Meat & Livestock Australia, 40 Mount Street, North Sydney, NSW 2060, Australia.
Meat science
|October 5, 2024
概括
为了提高羊肉的柔软度,需要精确的遗传参数. 数据编辑和屠宰后因素的计算提高了剪力育种值的预测,促进了基因评估.
科学领域:
- 动物育种与遗传学
- 肉类科学 肉科学
背景情况:
- 选择肉的柔软度,以剪切力来衡量,对于羔羊的价值和消费者满意度至关重要.
- 死亡后的因素,如pH值和温度影响剪切力,使遗传评估复杂化.
研究的目的:
- 调查数据编辑和屠宰后共变量对绵羊剪切力遗传参数的影响.
- 提高肉类柔软性的遗传评估的准确性.
主要方法:
- 分析了来自32,223只羊的数据,应用数据编辑技术去除极端值和当代组.
- 在遗传模型中纳入屠宰后的共同变量,例如热尸体重量和C位脂肪深度.
- 通过回归估计的繁殖值与后代的表现来评估模型可预测性.
主要成果:
- 数据编辑减少了残留变异和略微减少了附加遗传变异,改善了后代的性能预测.
- 包括热尸体重量,尸体重量和脂肪深度在内的模型显示出更好的可预测性.
- 识别了当前记录实践中的限制,以计算影响剪切力的环境因素.
结论:
- 严格的数据编辑对于准确地对羊的剪切力进行基因评估至关重要.
- 纳入相关的屠宰后协变量可以提高肉类柔软性的育种值的预测.
- 需要改进数据记录,以减轻来自屠宰场环境因素的偏差.
相关概念视频
02:27Background 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
01:43Incomplete 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