Identification of QTL associated with fruit traits in linkage groups II and IV of a RIL melon population derived from TGR-1551
A melon RIL population (F7:F8), derived from the Zimbabwean and multi-resistant accession TGR-1551 and the Spanish cultivar 'Bola de Oro', was characterized in order to detect QTL associated with vegetative, phenologic, and fruit traits. Means, standard deviations, pair-wise correlation, and ANOVA were estimated from data recorded in two growing seasons. Fifty-six QTL were detected for the 21 traits recorded during both years in eleven out of the twelve linkage groups (LG) of melon genetic map. Twenty-one and eleven of these QTL were found in LG II and IV, respectively, and they were involved mainly in fruit and ovary traits. Concretely, in LG II the QTL identified explained between 11.2 and 37.5% of the phenotypic variation observed, with LOD scores from 2.51 to 9.93 (2.5-3 of LOD threshold). The QTL associated with fruit length, female corolla diameter, and shape of both ovary and fruit, showed more than 25% of the phenotypic variation detected in those characters. In linkage group IV, the eleven QTL detected showed percentages of phenotypic variation explained ranging from 11.6 to 26.8%, with LOD scores between 3.07 and 7.63 (2.5-2.9 of LOD threshold). They explained more than 20% of the phenotypic variation observed for length and weight of fruits.
Beraldo-Hoischen, P., Gómez-Guillamón, M.L. and López-Sesé, A.I. (2017). Identification of QTL associated with fruit traits in linkage groups II and IV of a RIL melon population derived from TGR-1551. Acta Hortic. 1151, 51-56
fruit shape, length, ovary, quantitative trait loci, recombinant inbred line