Welcome to Chinese Agricultural Science Bulletin,

Chinese Agricultural Science Bulletin ›› 2022, Vol. 38 ›› Issue (15): 11-16.doi: 10.11924/j.issn.1000-6850.casb2021-0749

Special Issue: 生物技术 玉米

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Yield and Main Agronomic Traits of 5 New Hybrid Varieties of Maize: Grey Correlation Analysis

CHEN Chunyan(), YANG Shan(), LI Qingchao(), MA Jun, LIU Jianxin, CHENG Na   

  1. Bijie Institute of Agricultural Sciences, Bijie, Guizhou 551700
  • Received:2021-08-05 Revised:2021-11-15 Online:2022-05-25 Published:2022-06-07
  • Contact: YANG Shan,LI Qingchao E-mail:316287491@qq.com;790947470@qq.com;569733223@qq.com

Abstract:

In order to reveal the effect of main agronomic traits on yield of maize, five new maize hybrid varieties, ‘Shengnongyu 6’, ‘LCBB18-12’, ‘Bailongyu 303’, ‘Huinongdan 5’ and ‘Xikang 18’ were used as materials, agronomic traits of the 5 varieties, including growth period, plant height, ear height, ear length, ear diameter, kernel row number, kernel number per row, bald tip, kernel weight per ear and 100-kernel weight, and their grey correlations with yield were analyzed by using Excel and SPSSPRO. The results showed that the effects of the agronomic traits on yield were in the order of kernel row number (0.85), ear diameter (0.846), 100-kernel weight (0.845), plant height (0.843), kernel weight per ear (0.839), growth period (0.827), ear length (0.817), kernel number per row (0.812), ear height (0.812) and bald tip (0.59). Except bald tip, the correlations between yield and other 9 traits were higher than 0.8, and the correlation between bald tip and yield was small (0.59). It is concluded that the kernel row number, ear diameter, 100-kernel weight, plant height, kernel weight per ear, growth period, ear length, kernel number per row and ear height are the main factors of yield components. The results can provide theoretical reference for high-yield breeding of maize.

Key words: maize, agronomic traits, yield, grey correlation analysis

CLC Number: