超高产优质早熟籼粳杂交稻浙优915的选育与栽培技术

Breeding and cultivation techniques of super-high yield, high-qualityand early-maturity indica-japonica hybrid rice Zheyou 915

高产与优质是水稻产业的关键性目标,然而这2个性状存在明显的矛盾,运用常规育种技术在同一品种上集聚2个性状非常困难。本研究团队采用分子育种技术与籼粳杂种优势利用方法相结合,成功选育出超高产优质早熟籼粳杂交稻浙优915。该品种在区域试验和生产试验中,表现出超高产潜力。稻米品质符合食用稻部标三等,评价指标中除碱消值外,其余指标符合部标一等。全生育期为146.5~156.5 d,比嘉优5号早熟0.3~0.9 d。2023年通过国家品种审定,适宜在浙江、上海、安徽、湖北、苏南等南方粳稻种植区推广应用。根据浙优915品种特性,提出提高有效穗数和增加每穗粒数的关键性高产栽培技术。

High yield and high quality are the key goals of the rice industry,but there is an obvious contradiction between these two traits,and it is very difficult to gather the two traits on the same variety by conventional breeding techniques.Our research team successfully bred an ultra-high-yielding and high-quality early-maturing indica-japonica hybrid rice Zheyou 915 by combining molecular breeding technology with indica-japonica heterosis utilization method.This variety has shown very high yield potential in regional trials and production trials.The quality of rice is in line with the third grade of the ministry standard of edible rice,and the other indicators in the evaluation index are in line with the first grade of the ministry standard except for the alkali elimination value.The whole growth period was 146.5-156.5 days,and it was 0.3-0.9 days earlier than Jiayou 5.In 2023,it will pass the national variety approval and is suitable for promotion and application in southern japonica rice planting areas such as Zhejiang,Shanghai,Anhui,Hubei,and southern Jiangsu.According to the characteristics of Zheyou 915,this paper proposes a key high-yield cultivation technology to improve the effective panicle and increase the number of grains per panicle.