文献类型： 外文期刊

作者： Molina, A. B. ¹ ; Sinohin, V. O. ¹ ; Fabregar, E. G. ² ; Ramillete, E. B. ² ; Yi, G. ³ ; Sheng, O. ³ ; Karamura, D. ⁴ ; V ¹ ;

作者机构： 1.IRRI, Asia Pacific Commod Syst & Genet Resources Progra, Biovers Int CGIAR Res Program Roots Tubers & Bana, Los Banos, Laguna, Philippines

2.Lapanday Foods Corp, Davao, Philippines

3.Guangdong Acad Agr Sci, Inst Fruit Tree Res, Guangzhou, Guangdong, Peoples R China

4.Biovers Int CGIAR Res Program Roots Tubers & Bana, Box 24384, Kampala, Uganda

5.Biovers Int CGIAR Res Program Roots Tubers & Bana, W Croylaan 42, B-3001 Heverlee, Belgium

6.Univ Stellenbosch, Dept Plant Pathol, ZA-7602 Matieland, South Africa

关键词： disease resistance;East African highland bananas;Fusarium wilt;Panama wilt;plantains;tropical race 4

期刊名称：XXIX INTERNATIONAL HORTICULTURAL CONGRESS ON HORTICULTURE: SUSTAINING LIVES, LIVELIHOODS AND LANDSCAPES (IHC2014): IX INTERNATIONAL SYMPOSIUM ON BANANA: ISHS-PROMUSA SYMPOSIUM ON UNRAVELLING THE BANANA'S GENOMIC POTENTIAL

ISSN： 0567-7572

年卷期： 2016 年 1114 卷

页码：

收录情况： SCI

摘要： Bananas (Musa spp.) constitute one of the most important staple food crops in Africa. Two major groups of bananas exist in Africa: the East African highland banana (EAHB, AAA) in East and Central Africa, and the plantains (AAB) in West Africa. Neither of these groups has been affected by Fusarium oxysporum f. sp. cubense (Foc) race 1, which is the primary fungal pathogen in the continent for banana. The susceptibility of EAHB and plantains to Foc tropical race 4 (TR4) is unknown, and was the focus of this study. A collection of 14 genetically diverse EAHB and plantain cultivars were evaluated in China and The Philippines to determine field resistance to Foc TR4. A field heavily infested with TR4 was used in Guangzhou, China, and another one in Davao City in The Philippines. Disease incidence was determined according to leaf yellowing, pseudostem splitting and confirmed rhizome discoloration. The fungus was also re-isolated from diseased materials and identified by polymerase chain reaction (PCR) using Foc TR4-specific primers. All EAHB and plantain cultivars, except EAHB proved to be resistant to the tropical strain of Foc race 4, with disease incidence ranging from 0-5% only. In The Philippines, 'Ibwi' developed Fusarium wilt at an incidence of 32% compared to 46% for 'Williams' and 79% for 'Grand Naine's (both AAA genome, Cavendish subgroup). Similar results were observed in China where most cultivars were severely affected by the corm weevil. Our preliminary results indicate that African bananas are less vulnerable to Foc TR4 compared with some susceptible cultivars in Asia. A more extensive screening of African bananas is required considering the diversity of EAHB and plantains grown in that region.