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玉米育种通过对干干物质和的垂直分配变化,提高了寄宿抵抗力

Alejo Ruiz¹, Agustin Listello¹, Slobodan Trifunovic²

¹Department of Agronomy, Iowa State University, Ames, IA, United States.

Frontiers in plant science

|March 31, 2025

概括

玉米育种已经转移了干燥物质和的分配,使其在植物中的度更低. 较新的杂交物种表现出减少的茎生物量和改善的宿舍抵抗力,有利于现代农业实践.

科学领域:

农业科学农业科学
植物生理学植物生理学
遗传学是一个遗传学.

背景情况:

玉米茎支植物器官,储存碳水化合物和 (N) 用于谷物填充.
育种计划对垂直干茎干物质和分配的影响仍然不清楚.

研究的目的:

为了确定从1980年到2020年期间释放的杂交品中玉米干部分的干物质和N分配.
为了研究干物质和N重新调动模式在不同的干部部分.

主要方法:

在两年内研究了23种不同成熟度的玉米杂交 (1980-2020年).
在R2和R6阶段测量了四个相同的茎部分的干重,度和含量.

主要成果:

平均垂直分布:8% (顶部),17% (中顶部),29% (中底部),46% (底部).
育种减少了干干干干的干茎和R2 (顶部部分) 的N,而底部没有变化.
较新的杂交物重新调动了较少的干物质,但在R6上略有增加了N.

结论:

玉米育种间接改变了垂直茎干物质的分配,减少了耳叶以上的干物质.
这种转移降低了植物的重心,增强了宿舍阻力和高密度种植的适用性.
该研究提供了对玉米植物特征间接育种影响的见解.

关键词:

遗传上的收益遗传上的收益遗传上的收益寄存方式寄存方式寄存方式植物育种植物育种植物的高度植物的高度一个,一个茎,一个茎.

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