Evaluation of tomato genotypes for tolerance to major diseases in Uganda

Tomato ( Solanum lycopersicum L.) is a priority vegetable in Uganda, but due to its limited genetic base, its cultivated types are prone to a variety of diseases. The objective of this study was to evaluate new tomato genotypes for resistance to major tomato diseases under hotspot conditions in Ugan...

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Bibliographic Details
Published in:African crop science journal 2021-06, Vol.29 (2)
Main Authors: Ramathani, I, Ddamulira, G, Kangire, A, Wasswa, P, Tusiime, A
Format: Article
Language:English
Subjects:
Bacteria
Bactéries
blight
brûlure
gravité
severity
Solanum lycopersicum
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Summary:Tomato ( Solanum lycopersicum L.) is a priority vegetable in Uganda, but due to its limited genetic base, its cultivated types are prone to a variety of diseases. The objective of this study was to evaluate new tomato genotypes for resistance to major tomato diseases under hotspot conditions in Uganda. Fourty-five tomato genotypes were evaluated for reactions to tomato bacterial wilt, tomato bacterial speck, early blight and late blight. The study was conducted for two rainy seasons in 2019, at the National Crops Resources Research Institute, Namulonge in Uganda. Data for severity and incidence were collected at two-week intervals after transplanting. Twelve genotypes (Nouvella F1, Rambo F1, Commando F1, AVTO1315, AVTO922, AVTO1701, AVTO1219, AVTO1464, MT56, ADV1287A, Pruna and Vega) exhibited high levels of tolerance to bacterial wilt; while bacterial speck presented mild symptoms majorly seen on Vega, Zodiac and AVTO9802. Rhino, AVTO1418, AVTO1314, Eureka, Roma VFN, MT56, Pinktop, Assila F1, Money-maker, AVTO0922 and AVTO1464 were the least affected by early blight; while AVTO1219, AVTO1701, ADV12021, ADV12076 and ADV1287A expressed low AUDPC values for late blight. Overall, AVTO1315 was the best yielder (30.8 metric tonnes ha-1), followed by AVTO0301 (29.0 t ha-1) and Nouvella F1 (26.1 t ha-1). Among the tomato genotypes evaluated, we recommend AVTO1701, AVTO0922, AVTO1464, AVTO0301 AVTO1315, AVTO1219, Pruna, Vega, ADV1287A and MT56 for the national performance trials. La tomate ( Solanum lycopersicum L.) est un légume prioritaire en Ouganda, mais en raison de sa base génétique limitée, ses types cultivés sont sujets à une variété de maladies. L'objectif de cette étude était d'évaluer des génotypes de tomates sélectionnés pour leur résistance aux principales maladies de la tomate dans des conditions de hotspot en Ouganda. Quarante-cinq génotypes de tomates ont été évalués pour leurs réactions au flétrissement bactérien de la tomate, à la tache bactérienne de la tomate, au mildiou et au mildiou. L'étude a été menée pendant deux saisons des pluies en 2019, au National Crops Resources Research Institute, à Namulonge en Ouganda. Les données de gravité et d'incidence ont été recueillies à des intervalles de deux semaines après la transplantation. Douze génotypes (Nouvella F1, Rambo F1, Commando F1, AVTO1315, AVTO922, AVTO1701, AVTO1219, AVTO1464, MT56, ADV1287A, Pruna et Vega) présentaient des niveaux élevés de tolérance au flétrissement bactérien; tandis qu
ISSN:1021-9730