简斯基因酶2 (JAK2) 基因中的多态性和牛和绵羊中精选的性能特征之间的关联
Nicola Oster1, Małgorzata Anna Szewczuk1, Sławomir Zych2
1Department of Monogastric Animal Science, Faculty of Biotechnology and Animal Husbandry, West Pommeranian University of Technology in Szczecin, 29 Klemensa Janickiego, 71-270 Szczecin, Poland.
Animals : an open access journal from MDPI
|August 12, 2023
概括
在牛和羊中研究了Janus Kinase 2 (JAK2) 基因的遗传变异. 特定的JAK2基因型与两种物种的体重改善和每日增加有关,并提高了绵羊的生育能力和羔羊的存活率.
科学领域:
- 动物遗传学和动物基因组学
- 畜牧养殖和生产 畜牧养殖和生产
- 分子生物学和生物化学 分子生物学和生物化学
背景情况:
- 简氏激酶2 (JAK2) 对于涉及细胞因子受体 (包括生长激素受体) 的信号传导途径至关重要.
- JAK2信号影响反动物的生长,发育和生殖特征,使其成为基因改进的潜在目标.
- 要了解JAK2的作用,需要研究其在经济重要牲畜品种中的遗传多态性.
研究的目的:
- 研究JAK2基因中单核酸多态 (SNP) 与牛羊的生长和繁殖特征的关联.
- 确定JAK2基因中的潜在遗传标记物,以提高牲畜生产率.
- 探索JAK2伪激酶 (JH2) 和激酶 (JH1) 域在反动物特征变异中的作用.
主要方法:
- 在781头牛 (Hereford,Angus,Limousin) 中,对两个JAK2多态位点的基因型定型,跨越16和23个外体.
- 在333只绵羊 (波默兰,萨福克) 中,在6号和24号异构体中对3个JAK2多态位点进行基因定型.
- 统计分析以检查JAK2基因型和诸如体重,每日增加,生育能力和羔羊生存率等特征之间的关联.
主要成果:
- 牛:关联是不确定的,但特定的基因型 (AA在e16/RsaI和AA在e23/HaeIII) 在Hereford和Limousin品种中显示出更高的体重和每日增加的趋势 (p ≤0.05).
- 绵羊:不论品种,具有AA (e6/EarI),GG (e6/seq) 和AA (e24/Hpy188III) 基因型的个体体重量和每日增量显著增加 (p ≤ 0.01).
- 带有这些特定JAK2基因型的波默兰羊也表现出更好的生育能力和羔羊存活率 (p ≤0.01).
结论:
- 在JAK2基因中,特定的单核酸多态性与牛羊的增长特征有关.
- 在反动物中,JAK2基因多态表现出提高体重,每日体重增加,生育能力和羊羔存活率的潜在遗传标记.
- 建议对更大种群进行进一步的研究,包括哈普洛型分析和组合基因型系统,以验证这些发现.
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