Welcome to Journal of Agriculture,

Journal of Agriculture ›› 2022, Vol. 12 ›› Issue (4): 13-17.doi: 10.11923/j.issn.2095-4050.cjas2021-0156

Special Issue: 生物技术 植物保护 玉米

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Disease Resistance of Maize Varieties: Evaluation and Its Grey Correlation with Agronomic Characters

XI Xiaoqian(), LI Hong(), WANG Ruijun, ZHANG Xuli, YANG Zhibin   

  1. Institute of Crops in Cold Regions of Shanxi Agricultural University, Datong 037000, Shanxi, China
  • Received:2021-09-26 Revised:2021-12-05 Online:2022-04-20 Published:2022-05-19
  • Contact: LI Hong E-mail:675431872@qq.com;dtghslh@163.com

Abstract:

The aims are to study the relationship between agronomic characters and disease resistance of maize, and to breed maize varieties with high yield and high disease resistance. The disease resistance of 19 varieties in the regional trial of maize in the consortium was identified, and the relationship between agronomic characters and disease resistance was analyzed by grey correlation analysis. The results showed that all the 19 varieties had strong resistance to stem base rot and ear rot, weak resistance to head smut and dwarf mosaic, and medium resistance to large leaf spot. The kernel ratio, which was most closely related to yield, had the closest relationship with stem base rot. Ear rot was the second important factor that affected the yield. 100-grain weight, which ranked fourth in the impact on the yield, was closely related to large leaf spot, and kernel row number was most closely related to head smut. The plant height, which was positively related to the yield, had close relationship with dwarf mosaic. Therefore, the grey correlation analysis and disease resistance identification combining maize agronomic characters with disease resistance should emphasize the selection of resistance to head smut, large leaf spot and dwarf mosaic.

Key words: agronomic characters, disease resistance, grey correlation degree, head smut, large leaf spot, dwarf mosaic disease, stem base rot, ear rot

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