Response of banana hybrids to Sigatoka leaf spot disease under tropical conditions in Southern India.

• Authors : Nwauzoma, A.B.; Uma, S.; Mustaffa, M.M.; Durai, P.


• Document type : Journal article


• Year of publication : 2008


• Journal title : Acta Agronomica Nigeriana


• Volume (number) : 8 (1)




• Pages : 33-42


• Peer-reviewed : No


• ISSN : 0795-9982


• Language(s) : English


• Abstract : Sigatoka leaf spot disease (Mycosphaerella musicola) is a major constraint in banana production in India. All commercial banana cultivars like, 'Rasthali' (AAB, syn. 'Silk'), 'Karpuravalli' (ABB, syn. 'Pisang Awak'), 'Monthan' (ABB) and those of the AAA Cavendish subgroup, exhibit different levels of susceptibility. The National Research Centre for Banana has a mandate to improve cooking banana clones, such as those in the 'Pisang Awak' subgroup, to create elite diploids that are resistant to Sigatoka leaf spot and Fusarium wilt. The approaches include gene pyramiding to create elite diploids and their eventual use in breeding schemes. One of the strategies to overcome leaf spot diseases in Musa are by crossing improved (AA) diploids with triploids to obtain AAAB tetraploids that combine disease resistance with important agronomic characteristics. A trial was conducted from October 2006 to September 2007 to study the response of these hybrids to Sigatoka leaf spot before flowering under field conditions. The results indicate that disease development time (DDT) was the most reliable parameter to evaluate and distinguish the reaction of Musa hybrids to Sigatoka leaf spot. A preliminary ranking using this variable shows that two hybrids were susceptible, while the rest exhibited different levels of resistance and tolerance. Among the parents, 'Anaikomban' (AA) and 'Matti' (AA) were susceptible to the disease, Musa laterita did not express final disease symptoms and the rest were either partially or highly resistant. Finally, the ranking of Musa germplasm for Sigatoka leaf spot reaction in the area was established to serve as a reference for future evaluation trials.


• Keywords : MYCOSPHAERELLA MUSICOLA; FIELD TRIALS; INDIA; IMPROVED HYBRIDS


• Open access : No


• Musalit document ID : IN160644

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