籼粳亚种间杂交稻春优618亲本特征特性及制种技术

Parental Characteristics and Seed Production Techniques of Indica-Japonica Hybrid Rice Combination Chunyou 618

[目的]为了提高籼粳杂交稻新组合春优618的制种产量。[方法]依据春优618亲本的生物学特性,通过多年多点的田间试验研究和对比,总结出了高产稳产的杂交制种关键技术。[结果]在常规技术基础上,春优618制种地域选择面小,播种时间要求严格,栽插密度要求特殊,同时注意防范异常气温导致花期不育的风险。籼粳亚种间杂交稻组合制种存在一定的特殊性,必须严格按照技术要求生产,才能提高杂交种子的产量和质量。[结论]该研究可为春优618的大面积推广提供制种基础。

[ Objective] The aim was to improve the seed yield of lndiea-Japonica hybrid rice combination Chunyou 618. [ Method] Based on the biological characteristics of Chunyou 618 parents, through fietd experiment study of many years and different location, the key techniques of hybrid seed production yield was summarized. [ Result] When seed production of Chunyou 618, based on conventional techniques, production location choice surface is small, sowing time is strict, planting density is special, also pays attention to the prevention of abnormal temperature lead to blossom period not to meet. There are some special characteristics of hybrid rice seed production between Indica and japonica subspecies, in order to improve the yield and quality of hybrid seed, must be in strict accordance with the technical requirements for production. [ Conclusion] The study provides a seed production basis for promotion of Chunyou 618 in a large scale.