正常生长条件下推迟授粉对玉米子粒生长的影响  

Effects of Delayed Pollination on Kernel Development in Maize

作　　者：林珊[1] 赵雪[1] 陈先敏 吴巩 高震[1] 申思[1] 梁效贵[1] 周顺利[1,2] LIN Shan;ZHAO Xue;CHEN Xian-min;WU Gong;GAO Zhen;SHEN Si;LIANG Xiao-gui;ZHOU Shun-li(College of Agronomy&Biotechnology,China Agricultural University,Beijing 100193;Center of Agricultural Engineering and Technical Research for Lowland Plain of Hebei,Wuqiao 061802,China)

机构地区：[1]中国农业大学农学院,北京100193 [2]河北省低平原区农业工程技术研究中心,河北吴桥061802

出　　处：《玉米科学》2020年第1期98-103,110,共7页Journal of Maize Sciences

基　　金：粮食丰产增效科技创新重点专项(2016YFD0300301);国家玉米产业技术体系项目(CARS-02-13)

摘　　要：通过对先后吐出苞叶的花丝进行特定时间的授粉,研究正常生长条件下推迟授粉对玉米子粒生长的影响。结果表明,推迟授粉对先授粉子粒的生长影响较小,先授粉子粒粒重无显著差异,但显著减低了后授粉子粒的粒重,先玉335及登海605两个品种表现一致。进一步研究发现,后授粉子粒的生长动态即干物质积累动态与正常授粉子粒并不存在显著差异,先玉335、登海605、郑单958和大成168这4个品种表现一致,说明无胁迫条件下,推迟授粉仅仅相对推迟了后授粉子粒的生长发育时期,生长时间缩短,从而影响了子粒粒重形成。因此,正常生长条件下推迟授粉事件并未影响子粒生长,胁迫条件下的其他因素可能是造成子粒败育的根本原因。An experiment was conducted by delayed pollination on late emergence silks under normal growth conditions.We found that delayed pollination had little effect on the growth and development of early pollinated kernel.However,delayed pollination significantly reduced the weight of late pollinated kernel,Xianyu335 and Denghai605 hybrids both showed the same trend.The results also showed that there was no significant difference in dry matter accumulation between the late pollinated kernel and normal kernel with the same time after pollination,Xianyu335,Denghai605,Zhengdan958 and Dacheng168 hybrids all showed the same trend.In general,delayed pollination only delayed and shortened the development of late pollination kernel development,and thus affected kernel weight under no stress conditions.It was mentioning that factors other than delayed pollination likely play a key role in controlling kernel development under stress condition.

关 键 词：玉米 子粒 推迟授粉 败育 粒重 

分 类 号：S513.01[农业科学—作物学]