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Characterization of the Virulence and Yield Impact of Fusarium Species on Canola (Brassica napus)

文献类型: 外文期刊

作者: Yu, Haitian 1 ; Chang, Kan-Fa 1 ; Hwang, Sheau-Fang 1 ; Strelkov, Stephen E. 1 ; Baptista, Paula 1 ; Williams, Livy 1 ;

作者机构: 1.Univ Alberta, Dept Agr Food & Nutr Sci, Edmonton, AB T6G 2P5, Canada

2.Yunnan Acad Agr Sci, Inst Food Crops, Kunming 650205, Peoples R China

关键词: agronomic traits; Brassica napus; Fusarium species; interspecific interactions; yield loss model

期刊名称:PLANTS-BASEL ( 影响因子:4.5; 五年影响因子:4.8 )

ISSN:

年卷期: 2023 年 12 卷 17 期

页码:

收录情况: SCI

摘要: Multiple species of Fusarium can contribute to the development of root rot in canola (Brassica napus), making disease management difficult. We conducted field and greenhouse experiments to investigate the impacts of Fusarium avenaceum and Fusarium proliferatum, and the interaction between Fusarium oxysporum and F. proliferatum on root rot severity and canola yields. Inoculation with any of the three Fusarium spp. resulted in significant disease severity and reduced seedling emergence compared with non-inoculated controls, leading to yield reductions of up to 35%. Notably, there was a strong correlation (r = 0.93) between root rot severity at the seedling stage and at maturity. Regression analysis indicated a linear decline in seedling emergence with increasing disease severity. Furthermore, disease severity at maturity adversely affected the pod number per plant and the seed weight per plant, with both parameters ultimately approaching zero at a severity of 4.0 on a 0-4 scale. Co-inoculation with F. oxysporum and F. proliferatum induced more severe root rot than inoculation with each species on its own, suggesting synergistic interactions between these fungi. Knowledge of these interactions and the relative virulence of Fusarium spp. will contribute to the improved management of root rot in canola.

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