Abstract: The main causes of low yield in the single hybrid seeds of early maturity maize are the short vegetable growth period, few number and small area of leaf, and the insufficient supply of photosynthetic products, so as to result in the inferior ear and the unstaibility of the seed yield. As we know, besides selecting high combining ability, the breeding ways for the high seed yield based on the early maturity can be realized through raising the growth rate of leaf. The present paper considered that based on the higher combining ability, crossing the early croping single hybrid, which expresses high filling rate, with some middle and late maturing self-line can not only prolong vegetable growth period and improve assimilation products but also shorten filling period. It led to the early maturity and high Yield.

Key words: Vegetable growth period, Filling rate, Growth rate of leaves, Early maturity, Maize single hybrid, Yield

CLC Number: 

• S513.01