直立穗型水稻品种主要性状与选育技术的讨论

Discussion on Main Characters and Breeding Techniques of Erect Panicle Rice

根据20年来水稻育种理论与实践研究 ,认为水稻新品种选育过程中抓住生育前期早生快发、生育后期干物积累速度快且大、谷草比高于1.5:1、单茎重、茎基粗、单位长度茎秆重、穗部二次枝梗着粒率高、穗粒结构协调、抗当地主要病害、活秆成熟和耐寒性强等主要参数 ,即可在早期选育出具有高产性状的直立穗型水稻品种。

Based on the theory and practice of the rice breeding for 20 years, authors proposed that the high-yield rice varieties with erect big spike could be selected at the early stage of breeding in accordance with the parameters: fast growth at seedling stage, fast and high accumulation of dry matter at the late stage of the development, the ratio of grain/straw equals 1.5︰1 or more, heavy single tiller, thick tiller base, and heavy tiller per unit length; high grain setting rate at secondary branch; resistant to the main local pests; long stay green; being tolerant to cold.