玉米中含有高烯胺的氨基烯蛋白协同影响着传统玉米基因型的种子发芽和幼苗活力
Zahirul A Talukder1, Rashmi Chhabra1, Sudipta Basu1
1ICAR-Indian Agricultural Research Institute, New Delhi, India.
Journal of applied genetics
|May 21, 2024
概括
标记器辅助选择改善了状玉米杂交,增强了种子发芽和活力. 这些富含烯胺的性玉米品种显示出酶活性增加和电导率降低,表明种子质量优越.
科学领域:
- 植物育种 植物育种
- 分子遗传学 分子遗传学
- 生物化学 生物化学
背景情况:
- 性玉米的特点是含有高烯胺的玉米,对于食品和工业应用有价值.
- 传统的玉米杂交品种往往具有较低的氨基菌素水平,这影响了它们的效用.
- 递归的waxy1 (wx1) 基因控制了玉米内中的氨酸生物合成.
研究的目的:
- 评估1 (wx1) 基因的标记辅助选择 (MAS) 对玉米种子质量特征的影响.
- 为了比较MAS衍生的杂交的生理和酶特征与它们的原始对应物.
- 为了研究氨基培含量与种子活力,发芽和酶活性之间的相关性.
主要方法:
- 使用标记辅助选择 (MAS) 针对1 (wx1) 基因的玉米杂交的开发.
- 种子发芽的评估,种子活力指数-I和-II,以及电导率 (EC).
- 对酶活性的测定:脱酶 (DH),雌激酶 (EST),过氧酶 (POX),超氧化物脱酶 (SOD) 和α-氨基酶 (AMY).
主要成果:
- 与原始杂交品种 (72.4%) 相比,MAS衍生的杂交品种表现出显著更高的氨基菌素含量 (97.8%).
- 色版本显示种子质量有所改善,包括发芽率增加 (4.3%),活力指数-I (22.7%),活力指数-II (28.3%) 和测试重量 (15.2%).
- 在杂交品种中观察到增强的酶活性 (DH,EST,POX,SOD,AMY) 和降低的EC.
- 发现氨酸含量与种子发芽,活力指数和酶活性之间存在强烈的正相关性,而与EC存在负相关性.
结论:
- 通过MAS增强的waxy1 (wx1) 基因,在玉米中显著改善了种子活力,发芽和酶活性.
- 通过MAS获得的玉米杂交品种与传统杂交品种相比,表现出优越的生理和生化特征.
- 这项研究首次证实了wx1基因对玉米内精中的种子质量特征的协同作用,突出了它在培育改进品种方面的潜力.
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