古老的原始玉米本来是高株、多蘖、多穗,几乎每个叶腋都有拇指大的穗子,小粒。1959年河南农展会上还展出过这样的玉米。显然,这是自然选择的产物,因为高大的植株利于与杂草作斗争,分散的小果穗不仅利于种子传播而且虫害损伤一穗而不至于全株绝后。但这种株型对人工栽培是极不利的,首先给收获带来极大的不利。单秆单穗玉米的出现,与原始玉米 The original primitive corn was originally tall, more tillers, more spikes, almost every leaf axils have big thumbs, small grains. 1959 Henan Agricultural Exhibition also exhibited such a corn. Obviously, this is the product of natural selection, because tall plants favor the fight against weeds, scattered small ears not only conducive to the spread of seeds and pests damage a spike and not the whole plant never ending. However, this type of plantation is very unfavorable to artificial cultivation, first of all bring great disadvantage to the harvest. The emergence of single-stalk single-ear corn, with the original corn