Breeding drought-tolerant maize hybrids for the US corn-belt: discovery to product
Breeding drought-tolerant maize hybrids for the US corn-belt: discovery to product
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DOI：
10.1093/jxb/eru064
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发表时间：
2014-11-01
影响因子：
6.9
通讯作者：
Messina, Carlos
中科院分区：
文献类型：
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作者：
Cooper, Mark;Gho, Carla;Messina, Carlos
种质、遗传、表型和选择，再加上明确的产品目标，是成功的杂交玉米育种的基础。为美国玉米带干旱多发地区培育高产玉米杂交种，需要将多种针对干旱的技术与构成一个成功的玉米杂交种育种计划的所有其他技术组成部分相结合。管理环境技术被用来使在适当干旱环境条件下的精确表型能够扩展到育种方案水平。基因组学和其他分子技术被用来研究性状遗传结构。遗传预测方法被用于育种，以改善干旱易发环境的产量表现。这是通过将干旱表现的精确表型鉴定与对有助于在目标易干旱环境中成功杂交的性状的遗传理解以及分布在整个玉米基因组中的分子标记的可用性相结合而实现的。正在利用作物生长建模方法的进展来评估多种性状的综合效应，评估干旱杂交产品的概念，并指导其开发和评价。讨论了到目前为止的结果、吸取的教训和进一步提高美国玉米带玉米耐旱性的未来机会。
Germplasm, genetics, phenotyping, and selection, combined with a clear definition of product targets, are the foundation of successful hybrid maize breeding. Breeding maize hybrids with superior yield for the drought-prone regions of the US corn-belt involves integration of multiple drought-specific technologies together with all of the other technology components that comprise a successful maize hybrid breeding programme. Managed-environment technologies are used to enable scaling of precision phenotyping in appropriate drought environmental conditions to breeding programme level. Genomics and other molecular technologies are used to study trait genetic architecture. Genetic prediction methodology was used to breed for improved yield performance for drought-prone environments. This was enabled by combining precision phenotyping for drought performance with genetic understanding of the traits contributing to successful hybrids in the target drought-prone environments and the availability of molecular markers distributed across the maize genome. Advances in crop growth modelling methodology are being used to evaluate the integrated effects of multiple traits for their combined effects and evaluate drought hybrid product concepts and guide their development and evaluation. Results to date, lessons learned, and future opportunities for further improving the drought tolerance of maize for the US corn-belt are discussed.