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根据种苗中估计的基因效应,对爆米花的干旱耐受性进行早期选择

Carolina Macedo Carvalho¹, Shahid Khan^1,2, Antônio Teixeira do Amaral Junior¹

¹Laboratório de Melhoramento Genético Vegetal, Centro de Ciências e Tecnologias Agropecuárias (CCTA), Universidade Estadual do Norte Fluminense Darcy Ribeiro - UENF, Campos dos Goytacazes, Brazil.

Frontiers in plant science

|July 19, 2023

概括

由于气候变化,为干旱耐受性培育爆米花至关重要. 杂交品中的优势遗传效应是改善水压下的苗木特征的关键,特定的组合显示出有希望.

科学领域:

农业农业农业农业
植物科学植物科学
遗传学是一个遗传学.

背景情况:

气候变化增加了干旱的频率,威胁到全球粮食安全和爆米花的生产力.
缺水是一个主要的非生物压力,限制了爆米花的生长,发芽和幼苗的发展.
适应干旱的爆米花基因型的早期选择对于作物改善至关重要.

研究的目的:

为了研究爆米花在水压下特征的遗传基础.
在爆米花的早期发育阶段提出提高干旱适应性的育种策略.
为了在干旱条件下识别优越的爆米花杂交品种.

主要方法:

在水压下评估了45种爆米花拨号杂交品种 (25%的保留水量) 和完全灌 (70%的保留水量).
评估了发芽特征 (速度指数,7天发芽),芽特征 (长度,干重) 和根特征 (长度,干重,数量,体积等). ) 的情况.
分析了遗传效应,重点关注幼苗阶段特征的优势 (φs).

主要成果:

优势遗传效应显著影响在水压下在幼苗阶段评估的特征.
爆米花杂交物显示出成功繁殖干旱适应的潜力.
组合L61 x P2和L71 x P3在树枝和根系特征方面表现出卓越的表现.

结论:

混合利用对于培育耐旱爆米花是有效的,利用种苗特征的优势效应.
特别的杂交组合 (L61 x P2,L71 x P3) 建议用于开发适应水资源有限环境的爆米花品种.
这项研究为开发适应气候变化的爆米花品种提供了基础.

关键词:

齐亚可能是L.埃弗塔.占主导地位的影响.干旱干旱干旱干旱混合物混合物混合物水的压力是水压力.

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