与明恢６３比较，缙恢１号粳型特点突出，开花迟、集中；花粉量少，分蘖力弱；在高温下花粉生活力较弱。冈４６Ａ外露柱头存活时间长，但外露率仅４０％～５０％。制种区应选择在山区、丘陵区以避开开花期高温的不利影响。在保证花期相遇前提下，增加父本穴数和提高父本栽培水平是高产制种的关键。 Compared with Minghui63, Jinhui1 had the prominent features of japonica type, late flowering and concentration; less pollen and less tillering ability; pollen viability was weaker under high temperature. Gang 46A exposed stigma survival time is long, but the exposure rate of only 40% to 50%. Seed production area should be selected in the mountains, hilly areas to avoid the adverse effects of high temperature during flowering. Under the premise of ensuring that the flowering period meets, increasing the number of male parent points and raising the level of male parent cultivation are the keys to high-yielding seed production.