Journal
PLANT BREEDING
Volume 129, Issue 1, Pages 72-75Publisher
WILEY
DOI: 10.1111/j.1439-0523.2009.01655.x
Keywords
Cucumis melo; Podosphaera xanthii; dominant; epistasis; recessive
Funding
- CICYT [AGL2005-03850-C02-01]
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The inheritance of resistance to races 1, 2 and 5 of Podosphaera xanthii in the melon TGR-1551 was studied in a cross with the susceptible cultivar 'Bola de oro'. Under artificial inoculation conditions, four phenotypic classes were defined according to the level of fungal sporulation. The segregation ratios for resistance/susceptibility observed in the different populations and the results of the progeny test indicated that resistance to races 1, 2 and 5 of P. xanthii in TGR-1551 was governed by two independent genes, one dominant and one recessive, which means that the genetic control is a dominant-recessive epistasis. This is the first time that a recessive gene that confers resistance to more than one race of powdery mildew has been identified in melon. TGR-1551 could be considered a good genetic source for the development of powdery mildew resistant breeding lines.
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