摘要
以HD9802S为对照,对2个新育成的籼型光温敏核不育系恒59S和双香77S的开花习性及异交特性进行研究。结果表明,恒59S花时集中,开花高峰明显,花期较长,柱头外露率高,柱头活力强,有利于杂交制种;双香77S虽花时集中,开花高峰明显,但花期较短,柱头外露率较低,柱头活力较弱。比较2个不育系的异交特性,恒59S的柱头总外露率和双边外露率均显著高于双香77S,说明恒59S更有利于异交结实,可作为配制杂交组合的优良不育系在育种中加以利用。
In comparison to the control line HD9802S,this study investigated the flowering habits and cross-pollination characteristics of two newly developed indica photoperiod-thermo-sensitive genic male sterile(PTGMS)lines,Heng 59S and Shuangxiang 77S.The results showed that Heng 59S exhibited a concentrated blooming time with a clear peak,longer flowering duration,higher stigma exsertion rate,and stronger stigma vigor,which favor hybrid seed production.While Shuangxiang 77S also had a concentrated blooming time with a clear peak,but its flowering duration was shorter and it showed lower stigma exsertion rate and weaker stigma vitality.Comparing the cross-pollination characteristics of the two sterile lines revealed that both total stigma exsertion rate and double stigma exsertion rate were significantly higher in Heng 59S than in Shuangxiang 77S.This suggests that Heng 59S is more favorable for successful crosspollination and seed setting,making it an excellent candidate for use as a male sterile line in breeding programs.
作者
马进贤
邓征宇
周跃良
熊伟
卢含思
董韩逸
黄冰归
林立东
温圣贤
MA Jinxian;DENG Zhengyu;ZHOU Yueliang;XIONG Wei;LU Hansi;DONG Hanyi;HUANG Binggui;LIN Lidong;WEN Shengxian(College of Agronomy,Hunan Agricultural University,Changsha,Hunan 410128,China;Yongzhou City Company,Hunan Tobacco Company,Yongzhou,Hunan 425000,China;Hunan Hengde Seed Industry Technology Co.,Ltd.,Changsha,Hunan 410125,China)
出处
《杂交水稻》
CSCD
北大核心
2024年第5期71-75,共5页
Hybrid Rice
基金
湖南省烟草公司永州市公司科技项目(2022xczx-108)。
关键词
杂交水稻
光温敏核不育系
开花习性
柱头活力
异交结实率
hybrid rice
PTGMS line
flowering habit
stigma vigor
cross-pollination seed-setting rate
