应变效应对热带地区的相对生殖能力的影响
Oluwatosin Mawunapon Adegoke Jesuyon1, Kehinde Luke Akinsola2
1Animal Breeding and Genetics Unit, Department of Animal Production and Health, Federal University, Aare-Afao Road, P. M. B. 373, Oye - Ekiti, Ekiti State, Nigeria. dr.oluwatosinjesuyon14@gmail.com.
Tropical animal health and production
|April 20, 2025
概括
这项研究比较了热带地区的Bovan Nera (BN) 和Isa Brown (IB) 层,发现IB在蛋生产和繁殖成功方面优越,而BN在生产一天大的公小和小健康方面表现出色.
科学领域:
- 禽畜科学 禽畜科学 禽畜科学
- 动物育种 动物育种
- 热带农业 热带农业
背景情况:
- 为热带环境优化层次品种对于高效的家禽生产至关重要.
- 了解特定菌株的适应性和生殖特征对于育种计划至关重要.
研究的目的:
- 评估和比较两个层品种Bovan Nera (BN) 和Isa Brown (IB) 在热带条件下的健康和生殖表现.
- 确定与商业家禽养殖相关的初级和健康特征的菌株特异性优点和弱点.
主要方法:
- 一个完全随机的设计被用来评估十个主要特征和十一个健身特征在BN和IB母股母.
- 从20个批次收集数据,每批约包括3254只和400只,在深系统上养.
- 统计分析包括相关性和回归分析,以评估特征与整体健康之间的关系.
主要成果:
- 与Bovan Nera (BN) 相比,伊莎布朗 (IB) 的生卵产量 (75.00%与71.00%) 和生殖周期成功率 (3.47与3.15) 显著提高.
- BN菌株产生的日龄小的百分比更高 (43.44%与41.60%相比),日龄小的体质更好.
- 在两种菌株 (r=0.52-0.97) 中,在肥沃蛋 (CDF) 上的公一天大的小和肥沃蛋的化能力 (HFE) 以及一天大的小 (SDF) 的存活率之间观察到强烈的相关性.
结论:
- 伊莎布朗母在母生育,生育能力和生殖周期的成功方面都优越,这使得它们有利于蛋生产.
- 博万·内拉菌株在生产一天大的公小和小整体健康状况方面表现更好,这表明它适合用于肉母群.
- 品种选择应考虑特定的生产目标,平衡卵生产效率与的质量和在热带气候下生存率.
相关概念视频
Background and Environment Affect Phenotype
6.4K
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...
6.4K
Frequency-dependent Selection
21.7K
When the fitness of a trait is influenced by how common it is (i.e., its frequency) relative to different traits within a population, this is referred to as frequency-dependent selection. Frequency-dependent selection may occur between species or within a single species. This type of selection can either be positive—with more common phenotypes having higher fitness—or negative, with rarer phenotypes conferring increased fitness.
21.7K
Types of Selection
39.9K
Natural selection influences the frequencies of particular alleles and phenotypes within populations in several different ways. Primarily, natural selection can be directional, stabilizing, or disruptive. Directional selection favors one extreme trait and shifts the population towards that phenotype while selecting against individuals displaying alternate traits. Stabilizing selection favors an intermediate trait with a narrow range of variation. Deviation from the optimal phenotype towards an...
39.9K
Limits to Natural Selection
31.0K
Organisms that are well-adapted to their environment are more likely to survive and reproduce. However, natural selection does not lead to perfectly adapted organisms. Several factors constrain natural selection.
31.0K


