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Inheritance of resistance to races 1, 2 and 5 of powdery mildew in the melon TGR‐1551
Author(s) -
YusteLisbona F. J.,
LópezSesé A. I.,
GómezGuillamón M. L.
Publication year - 2010
Publication title -
plant breeding
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.583
H-Index - 71
eISSN - 1439-0523
pISSN - 0179-9541
DOI - 10.1111/j.1439-0523.2009.01655.x
Subject(s) - powdery mildew , biology , melon , epistasis , cultivar , inoculation , hybrid , genetics , inheritance (genetic algorithm) , horticulture , botany , gene
With 1 figure and 2 tablesAbstract 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.