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复杂特征的基因组估计揭示了古老的玉米适应北美温带

Kelly Swarts^1,2, Rafal M Gutaker², Bruce Benz³

¹Department of Plant Breeding and Genetics, 175 Biotechnology Building, Cornell University, Ithaca, NY 14853, USA.

Science (New York, N.Y.)

|August 5, 2017

概括

西南地区的古玉米适应了早期的开花,这表明温带适应导致了其从现有的遗传多样性进化. 这项研究揭示了早期作物适应和种群动态.

科学领域:

古植物学
基因组学
农业科学

背景情况:

玉米 (Zea mays) 在美国西南部被引入约4000年前.
低地沙漠的农业发展迅速,但在温带高地却延迟了2000年.

研究的目的:

调查温带西南地区早期高地玉米是否适合早期开花.
了解古代玉米种群适应的遗传基础.

主要方法:

来自土耳其笔庇护所的15个古老的玉米 (约1900年).
用间接验证的基因组模型来预测古老的表型.

主要成果:

据预测,土耳其玉米在开花时间的适应程度很小.
古老的玉米表现出矮身,耕作,并为黄色的核颜色而分离.
基因组模型成功预测了多基因特征.

结论:

温带适应对西南地区的玉米种群差异产生了重大影响.
适应是由对古老的基因变异产生作用的选择驱动的.
经过验证的基因组预测提高了对古代表型和环境适应动态的理解.

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