综合多组织转录学揭示了调节老化的跨组织调节网络和枢纽基因
Yuejie Han1, Fangren Lan1, Ronglang Cai1
1State Key Laboratory of Animal Biotech Breeding, Frontier Science Center of Molecular Design Breeding, China Agricultural University, Beijing 100193, China; National Engineering Laboratory for Animal Breeding, College of Animal Science and Technology, China Agricultural University, Beijing 100193, China.
Poultry science
|August 29, 2025
概括
提高家禽料效率是利的关键. 这项研究确定了产母中调节料摄入量和生产特征的22个枢纽基因,为遗传选择提供了分子框架.
科学领域:
- 动物遗传学和育种
- 禽类科学
- 分子生物学
背景情况:
- 料成本对家禽的利能力产生重大影响,需要通过基因选择提高料效率.
- 剩余料摄入量 (RFI) 是料效率的黄金标准,但其分子基础尚未得到充分理解.
- 对于可持续的家禽生产来说,了解养老产母的基因和分子效率至关重要.
研究的目的:
- 估计产卵母的预计剩余料摄入量 (E-RFI) 和相关产量和脂质特征的遗传性.
- 通过对极端E-RFI个体进行多组织转录组分析来确定E-RFI的分子调节剂.
- 通过有针对性的基因策略建立一个分子框架,以优化老化的料效率.
主要方法:
- 对E-RFI,蛋质量和脂质特征 (甘油三,自由脂肪酸,胆固醇) 的遗传参数的估计.
- 选择了40个极端E-RFI个体,并对7个组织进行了转录组分析 (下丘脑,垂体,肝脏,胰腺,十二指肠,大肠,).
- 综合性多组织分析以确定枢纽基因并构建与E-RFI相关的监管网络.
主要成果:
- 对于E-RFI (0.45) 和卵数 (0.37) 的中等遗传性,对于平均卵重 (0.64) 的高遗传性,对于脂质特征的低至中等遗传性.
- 提高料效率 (降低E-RFI) 与蛋重量和蛋黄脂含量增加相关,但蛋黄质量和干物质减少.
- 鉴定了22个在肝脏,十二指肠和阴中丰富的枢纽基因 (例如,SHMT1,OAT,CPT1A,CYCS),参与能量新陈代谢,蛋白质平衡和脂质新陈代谢,形成跨组织的调节网络.
结论:
- E-RFI具有适度的遗传性,这表明产母的遗传改善潜力.
- 跨多个组织的22个枢纽基因网络在调节料效率和相关代谢过程中发挥着重要作用.
- 这些发现为开发有针对性的基因策略提供了分子基础,以提高老化产母的料效率.
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