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玉米起源于中南美洲,是天然的异花授粉作物,它雌雄同株异花且异位,主要靠风媒传粉,自然群体通常是杂合体,遗传基础丰富,类型多样。玉米传入我国栽培已经有近500年
Originated from Central and South America, maize is a natural cross-pollination crop. Its isoflora and ectopia are monoecious, mainly by wind-pollination. Natural populations are usually heterozygous with abundant genetic basis and diverse types. The cultivation of corn has been introduced into our country for nearly 500 years