HUBEI AGRICULTURAL SCIENCES ›› 2025, Vol. 64 ›› Issue (10): 10-15.doi: 10.14088/j.cnki.issn0439-8114.2025.10.002

• Breeding & Cultivation • Previous Articles     Next Articles

Comprehensive evaluation of agronomic traits and yield components of 52 early-maturing cotton lines

YAN Zhen-hua, HUANG Xiao-li, DAI Bao-sheng, ZHANG Hua-chong, ZHAO Shu-qi, ZHANG Xin, LI Wei   

  1. Huanggang Academy of Agricultural Sciences, Huanggang 438000, Hubei, China
  • Received:2025-03-18 Online:2025-10-25 Published:2025-11-14

Abstract: In order to screen lines with superior comprehensive traits, 10 agronomic traits of 52 early-maturing cotton lines were comprehensively evaluated using methods of variability, correlation, principal component, and cluster analysis. The results showed that lint yield, seed cotton yield, plant height, and number of bolls per plant all exhibited moderate genetic variation characteristics, were relatively susceptible to environmental influences, and demonstrated strong plasticity. Lint yield showed a highly significant positive correlation with plant height, lint percentage, and seed cotton yield, and a significant positive correlation with growth period and the number of bolls per plant. Cluster analysis categorized the lines into three groups: Group Ⅰ consisted of 11 lines, accounting for 21.15% of the total materials; Group Ⅱ consisted of 25 lines, accounting for 48.08%; Group Ⅲ consisted of 16 lines, accounting for 30.77%. Principal component analysis extracted four principal components, with a cumulative contribution rate of 79.06%. Principal Component 1 was mainly associated with yield-related traits; Principal Component 2 was primarily related to boll setting factors; Principal Component 3 was chiefly connected to seed cotton yield factors; Principal Component 4 could be understood as the fruit branch factor. Based on comprehensive scores, 10 lines with excellent performance were identified, among which Line 1 performed the best.

Key words: early-maturing cotton, lines, agronomic traits, yield, comprehensive evaluation

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