1. Pathogenic test of 5 different strains of Fusarium oxysporum f. sp. cubense Race 4 to banana cultivar Guijiao 6.
- Author
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QIN Liu-yan, SUN Jia-man, WEI Di, HUANG Su-mei, LU Jiang, TIAN Dan-dan, WEI Shao-long, and LI Chao-sheng
- Abstract
[Objective] The resistance properties of banana variety Guijiao 6 against Fusarium oxysporum f. sp. cubense Race 4 (Foc4 % in different regions of Guangxi were tested to screen strains with strong resistance and provide backup strains for identifying resistance of new banana varieties. [Method]Foc4 strains (J-2, SD-2,T-2,W-2, F-2% were inoculated to the potted Guijiao 6 banana cultivar at the same time respectively by root scratching inoculation method. The symptoms of banana plants leaves were observed after 10 days, 15 days, 2 0 days, 25 days and 30 days of inoculation, respectively. The corm of banana plants was anatomized and observed after 30 days of inoculation. The virulence of different strains was evaluated by analyzing both outer and inside symptoms of infected Guijiao 6 banana cultivars. [Result]SD-2, J-2, T-2 and W-2 strains all showed strong virulence towards Guijiao 6, among which SD-2 and J-2 had the strongest virulence. The edge of leaves began to turn yellow after 10 days of SD-2 and J-2 inoculation and etiolation appeared 15 days later. 30 days later, the plants became shorter, weaker and even withered. 20 days after inoculated with T-2 and W-2, banana plants also turned yellow, but the plants still grew normally. F-2 strain virulence was weaker, but it still belonged to moderate virulent strains. [Conclusion]Guijiao 6 banana cultivar is a susceptible variety to Foc4, and wilt should be paid special attention in planting. J-2 and SD-2 strains can be used as identification strains for breeding wilt-resistant banana cultivars. [ABSTRACT FROM AUTHOR]
- Published
- 2014
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