Journal of Zhejiang Agricultural Sciences ›› 2025, Vol. 66 ›› Issue (5): 1173-1180.DOI: 10.16178/j.issn.0528-9017.20250123

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Comprehensive evaluation of phenotypic traits in late direct-seeded rapeseed in Northern Zhejiang

WANG Ruisen1(), QUAN Xinhua1, YANG Hailong1, JIANG Cong2, YAO Xiangtan1, ZHANG Quanfeng2,*()   

  1. 1. Jiaxing Academy of Agricultural Sciences, Jiaxing 314016, Zhejiang
    2. Zhejiang Wuwangnong Seeds Shareholding Co.,Ltd., Hangzhou 311215, Zhejiang
  • Received:2025-02-10 Online:2025-05-11 Published:2025-05-20

Abstract:

The diversity levels of 13 major phenotypic traits of 14 rapeseed varieties were comprehensively analyzed using indicators such as coefficient of variation and variation range. The results showed that the growth period of rapeseed was shortened to 166-174 days after late sowing, and plant height was reduced to 99.20-120.60 cm. Yield was significantly influenced by cold tolerance, with the frost-resistant variety Yueyou 518 achieving a yield of 1 296.60 kg·hm-2. The number of effective pods per plant exhibited the richest variation, while the growth period was relatively the most stable. The diversity indices of the 13 traits ranged from 3.039 6 to 3.807 2, with a small variation range. Principal component analysis extracted five principal components, accounting for 91.03% of the cumulative contribution rate, among which PC1 (number of effective branches) and PC2 (number of effective pods per plant) significantly contributed to yield. Based on comprehensive evaluation scores, Yueyou Huaye 15, Ningza 559, and Fengyou 737 demonstrated the best overall performance and were recommended as high-yield potential varieties. Cluster analysis divided the rapeseed varieties into two major groups, with significant differences in traits such as growth period and surviving seedling number between the groups. This study identified rapeseed varieties with excellent comprehensive traits, clarified the genetic diversity of rapeseed traits and key yield-influencing factors under late direct-seeding conditions, and provided theoretical support for rapeseed breeding and cultivation management in Northern Zhejiang.

Key words: rapeseed varieties, late direct-seeding, phenotypic diversity, trait analysis, comprehensive evaluation

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