开颖促进剂RHS_(1)对含粳型血缘籼型不育系开花习性的影响  

Effects of glume opening accelerator RHS_(1)on flowering habits of Indica male sterile lines with Japonica blood

作　　者：黄乾龙[1,2] 李贤勇 何永歆[2,3] 蒋刚 朱子超 欧阳杰[1,2] 管玉圣 熊英[1,2] 王楚桃 HUANG Qian-long;LI Xian-yong;HE Yong-xin;JIANG Gang;ZHU Zi-chao;OUYANG Jie;GUAN Yu-sheng;XIONG Ying;WANG Chu-tao(Rice Research Institute,Chongqing Academy of Agriculture Science,Chongqing 400060,China;Chongqing Key Laboratory of Hybrid Rice Breeding,Chongqing 400060,China;Chongqing Zhongyi Seed Co.,Ltd.,Chongqing 400060,China)

机构地区：[1]重庆市农业科学院水稻研究所,重庆400060 [2]杂交水稻育种重庆市重点实验室,重庆400060 [3]重庆中一种业有限公司,重庆400060

出　　处：《南方农业学报》2021年第7期1899-1904,共6页Journal of Southern Agriculture

基　　金：国家重点研发计划七大农作物育种专项(2016YFD0101101);重庆市农业科学院绩效激励引导专项(cqa-as2020jxjl01);重庆市农业科学院青年创新团队项目(NKY-2018QC03)。

摘　　要：【目的】探究开颖促进剂RHS_(1)对2个含粳型血缘的籼型不育系开花习性的影响,为繁殖制种利用开颖促进剂调控花时提供理论依据。【方法】以含粳型血缘的籼型不育系神农4A和18A为材料,采用单因素完全随机区组设计方法,设0.1 mL/L的开颖促进剂RHS_(1)药剂处理和清水对照(CK),调查对比不同处理供试材料的单穗开花花时动态、单穗开花历期、单穗日开花动态、颖花开颖角度、颖间距、包颈率、柱头外露率及闭颖情况。【结果】开颖促进剂RHS_(1)不仅可提早花时和提高花时集中度,还可提高花期集中度。与CK相比,RHS_(1)处理可使花时提早0.5 h,可使花时集中度(以午前花率衡量)提高3.72%~13.55%;可使花期集中度(以开花历期衡量)提前0.10~4.64 d;但不同材料的花时、花期对RHS_(1)响应的敏感性存在差异。与CK相比,开颖促进剂RHS_(1)对开颖角度、颖间距、柱头外露率、包颈率及闭颖情况无显著影响(P>0.05)。【结论】开颖促进剂RHS_(1)在配套使用技术成熟的前提下可作为调节花时的药剂之一在生产中推广使用。【Objective】To provide a theoretical basis for the use of glume-opening accelerator to regulate flowering in seed production,the effect of glume-opening accelerator RHS_(1)on flowering habits of two Indica male sterile lines(CMS)lines with Japonica blood was researched.【Method】Using the Indica CMS lines Shennong 4A and 18A with Japonica blood as the materials,using the single-factor completely randomized block design method,and treating with 0.1 ml/L of glume-opening accelerator RHS_(1)and clear water control(CK),the dynamics of single-spike flowering time,single-spike flowering duration,single-spike daily flowering dynamics,glume opening angle,glume spacing,necking rate,stigma exposure rate,and closure situation of different tested materials were investigated and compared.【Result】The results showed that the flower opening accelerator RHS_(1)could not only advance flower time of text materials and increase flower time concentration,but also increase flower period concentration.Compared with clearwater control treatment,the flowe ring time treated by RHS_(1)was advanced 0.5 h,the flowering time concentration(measured by flowering rate before noon)treated by RHS_(1)was increased by 3.72%to 13.55%,and the flowering time concentration treated by RHS_(1)(measured by the flowering period)was advanced 0.10 to 4.64 d;but there were differences in the sensitivity of the response to flowering time and flowering period among different materials.Compared with water clear control treatment,there were no significant differences in the glume opening angle,glume spacing,stigma exposure rate,necking rate and closure situation of the agent RHS_(1)(P>0.05).【Conclusion】The flowering opening accelerator RHS_(1)can be used as one of the commonly used agents for adjusting flowering time and be promoted in production under the premise of mature supporting technology.

关 键 词：开颖促进剂RHS_(1) 含粳型血缘的籼型不育系 开花习性 

分 类 号：S511[农业科学—作物学]