The maize breeding in Liaoning province plays very important roles in China.

辽宁省玉米新品种选育研究在全国占有重要地位。

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There were many uncertain factors to high density maize breeding and production.

关于玉米的密植育种和生产还有很多不确定因素。

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Pedigree method, backcross method and convergent cross selection are used widely in dwarf maize breeding.

矮生玉米自交系的选育方法主要有系谱法、回交法和聚合选择法。

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In traditional plant breeding, some inbred maize plants destined to be crossed with others have their male, pollen-producing tassels cut off to prevent self-fertilisation (maize is a horticultural hermaphrodite, carrying both male and female sex organs).

ECONOMIST: Terminator genes