摘要
为了研究玉米穗部性状的分离特征,采用玉米杂交种‘先玉335’的双亲‘PH6WC’、‘PH4CV’和‘郑单958’的双亲‘郑58’‘、昌7-2’杂交组配了四交F2分离群体,对11个穗部性状进行了表型鉴定,并对其进行了相关分析和通径分析。结果显示:穗部各性状变异系数较大,变异系数为7.68%~96.27%,尤其秃尖长变异系数达到了96.27%;穗粒重与穗长、穗粗、穗行数、行粒数、粒长、粒厚、轴粗、百粒重呈极显著或显著正相关;行粒数、百粒重、穗行数、穗长和粒厚对穗粒重的直接通径系数为较大正效应,而粒宽和秃尖长为较大负效应。本研究可为玉米穗部性状的改良提供参考。
To study the separation characteristics of ear traits of maize,the parents’PH6 WC’and’PH4 CV’of maize hybrid’Xianyu 335’and parents’Zheng 58’and’Chang 7-2’of hybrid’Zhengdan 958’were hybridized to make the four-cross F2 separation population.Eleven ear traits data were identified,and correlation analysis and path analysis were carried out.The results showed that the variation coefficient(CV)of each trait had a wide range,from 7.68%to 96.27%,especially that of bald tip length reached peak value of96.27%.The ear grain weight showed extremely significant or significant positive correlation with ear length,ear diameter,row number per ear,kernel number per row,kernel length,kernel thickness,cob diameter and100-kernel weight.Path coefficient analysis revealed that kernel number per row,100-kernel weight,row number per ear,ear length and kernel thickness had more positive effect on ear grain weight,while kernel width and bald tip length had more negative effect on ear grain weight.This study provides certain references for the ear traits improvement of maize.
作者
史庆玲
李可伟
董永彬
冉午玲
李玉玲
Shi Qingling;Li Kewei;Dong Yongbin;Ran Wuling;Li Yuling(College of Agronomy,Henan Agricultural University,Zhengzhou 450046;Seed Administrative Station of Henan,Zhengzhou 450016)
出处
《中国农学通报》
2020年第14期22-27,共6页
Chinese Agricultural Science Bulletin
基金
河南省现代农业产业技术体系“玉米遗传育种首席专家”(S2010-02-G01)
河南省基础与前沿技术研究“玉米粒重主效QTLqGW1的候选基因功能分析及优异种质挖掘”(162300410179)
《郑州市重大科技创新专项项目“稳产宜机收玉米新品种豫单132创育及全产业链应用(2019CXZX0082)。
关键词
玉米
四交群体
穗部性状
相关分析
通径分析
maize
four-cross population
ear traits
correlation analysis
path analysis
