杂交水稻2025，Vol.40Issue(4)：33-40,8.DOI:10.16267/j.cnki.1005-3956.20241025.232
6个水稻两系不育系的开花习性研究
Flowering Habits of Six Two-line Male Sterile Lines of Rice
摘要
Abstract
Understanding the flowering habits of sterile lines is of great significance for enriching the high-yield seed production theory of hybrid rice,improving seed production yield,reducing seed costs and promoting the high-quality development of hybrid rice.Taking six two-line male sterile lines,namely Shuang 1S,Y58S,Guangzhan 63-4S,Long S,Jing 4155S and Han 2S,as the research objects,their flowering habits were studied.The results showed that the male sterility of the tested six male sterile lines was stable.Shuang 1S,Y58S,Jing 4155S and Han 2S had concentrated flowering periods and a relatively high forenoon flowering rate,which was beneficial for hybrid seed production.The flowering duration of Long S was relatively scattered,and the flowering rate during the full-blooming stage was low,which was not conducive to increasing the yield of hybrid seed production.Guangzhan 63-4S showed closed glume flowering due to the influence of high-temperature weather,and the stigma vitality was very low,making it unsuitable for hybrid seed production in high-temperature environments.Overall,Shuang 1S had the best flowering habits.It had the highest daily flowering peak during the concentrated flowering time of a day(33.0％),the highest first-day flowering rate(10.3％),and the highest cumulative flowering rate in the first four days(75.3％).In addition,it had the longest stigma(2.52 mm)and the highest single-side stigma exsertion rate(32.1％),double-side stigma exsertion rate(37.9％),total stigma exsertion rate(70.0％)and stigma vigor coefficient(1.77),and the largest number of spikelets per panicle(370.7).It ranked second in terms of forenoon flowering rate,glume-opening angle,glume-opening time,stigma width,stigma surface area and stigma volume.关键词
杂交水稻/两系不育系/开花习性/高产制种/爽1SKey words
hybrid rice/two-line male sterile line/flowering habits/high-yield seed production/Shuang 1S分类
农业科技引用本文复制引用
周义,刘爱民,舒服,孙平勇,李欣芃,郭杨,方雅格,郭洁莹,何强,张武汉,邓华凤,赵旺辉..6个水稻两系不育系的开花习性研究[J].杂交水稻,2025,40(4):33-40,8.基金项目
湖南省十大技术攻关项目(2025QK1006) （2025QK1006）
湖南省重点研发计划(2023NK2004) （2023NK2004）
国家自然科学基金(32172000) （32172000）
湖南省农业科技创新资金(2024CX03) （2024CX03）
