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中国农学通报 ›› 2020, Vol. 36 ›› Issue (14): 22-27.doi: 10.11924/j.issn.1000-6850.casb20190500141

所属专题: 玉米

• 农学·农业基础科学 • 上一篇    下一篇

玉米四交群体穗部性状的相关及通径分析

史庆玲1,2, 李可伟1, 董永彬1(), 冉午玲2, 李玉玲1   

  1. 1 河南农业大学农学院,郑州 450046
    2 河南省种子管理站,郑州 450016
  • 收稿日期:2019-05-14 修回日期:2019-07-30 出版日期:2020-05-15 发布日期:2020-05-20
  • 通讯作者: 董永彬
  • 作者简介:史庆玲,女,1982年出生,山西太谷人,农艺师,博士,主要从事玉米分子检测研究。通信地址:450016 河南省郑州市郑东新区商都路26号 河南省种子管理站,Tel:0371-86150579,E-mail: qinglingshi021@163.com。
  • 基金资助:
    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QTL qGW1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)

Ear Traits of Maize Four-cross Population: Correlation Analysis and Path Analysis

Shi Qingling1,2, Li Kewei1, Dong Yongbin1(), Ran Wuling2, Li Yuling1   

  1. 1 College of Agronomy, Henan Agricultural University, Zhengzhou 450046
    2 Seed Administrative Station of Henan, Zhengzhou 450016
  • Received:2019-05-14 Revised:2019-07-30 Online:2020-05-15 Published:2020-05-20
  • Contact: Dong Yongbin

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。

关键词: 玉米, 四交群体, 穗部性状, 相关分析, 通径分析

Abstract:

To study the separation characteristics of ear traits of maize, the parents ‘PH6WC’ and ‘PH4CV’ 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 of 96.27%. 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 and 100-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.

Key words: maize, four-cross population, ear traits, correlation analysis, path analysis

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