杂交水稻2026，Vol.41Issue(3)：23-29,7.DOI:10.16267/j.cnki.1005-3956.20241208.274
BT型和印水型同核异质粳稻不育系开花习性研究
Study on Flowering Habits of BT-Type and Yinshui-Type Isonuclear Alloplasmic CMS Lines of Japonica Rice
摘要
Abstract
Three groups of isonuclear alloplasmic cytoplasmic male sterility(CMS)lines of japonica rice with over 10 generations of backcrossing and their maintainer lines were used as experimental materials.The flowering dynamics of single panicles,daily flowering dynamics,glume opening angles,and stigma exsertion rates of experimental materials were observed and analyzed.The results showed that after BT-type(Baotai-type)CMS lines of japonica rice were transformed into Yinshui-type CMS lines of japonica rice,the two types of CMS lines were basically the same in the initial flowering time.After the initial flowering,the daily flowering number of Yinshui-type CMS lines of japonica rice began to decline after rapid growth,and then grew again to reach the peak flowering stage.The peak flowering stages of the two types of CMS lines were basically the same,which had little effect on the reproduction of CMS lines and the seed production of hybrid rice.Two peak flowering stages existed in the whole flowering process of Yinshui-type CMS lines of japonica rice,exerting a positive effect on the outcrossing seed setting rate.The flowering time of BT-type CMS lines of japonica rice was relatively concentrated,while that of Yinshui-type CMS lines of japoncia rice was relatively scattered and lasted longer.There was no significant difference in the glume opening and closing time between the two types of cytoplasms.Yinshui-type CMS lines of japonica rice had significantly larger glume opening angles than BT-type CMS lines of japonica rice.In terms of the stigma exsertion rate,the Yinshui-type Liluxian A was extremely significantly better than the BT-type Liluxian A,and the other two groups of CMS lines had their own advantages and disadvantages.Therefore,in terms of flowering habits,it is feasible to use Yinshui-type CMS lines in the breeding and production of japonica hybrid rice in northern China.关键词
杂交粳稻/细胞质类型/BT型/印水型/不育系/开花习性Key words
japonica hybrid rice/cytoplasmic type/BT-type/Yinshui-type/CMS line/flowering habit分类
农业科技引用本文复制引用
孙驰,张城,张雪,张丽丽,王彦荣,田书军,郭艳颖,于亚辉..BT型和印水型同核异质粳稻不育系开花习性研究[J].杂交水稻,2026,41(3):23-29,7.基金项目
辽宁省自然科学基金计划项目(2022-MS-059) （2022-MS-059）
辽宁省科技重大专项(2024JH1/11700006-2) （2024JH1/11700006-2）
