Mapping of QTLs for citrus quality traits throughout the fruit maturation process on clementine (Citrus reticulata × C. sinensis) and mandarin (C. reticulata Blanco) genetic maps

Abstract Citrus fruit quality is defined as the combination of physical and chemical traits; some which may change during ripening phase, e.g., acidity sugar content. A clear understanding their genetic control would be very helpful for marker-assisted breeding programs especially with regard to juvenile phase reproductive features that hamper selection improved hybrids. study was thus performed on heredity traits QTL detection based segregation in a progeny generated from cross between clementine cv “Commun” ( × reticulata ) mandarin “Willow leaf” C. Blanco). Parental consensus linkage maps were constructed using 645 SNP SSR markers. These represented by 10 groups 12 mandarin, representing 75% 58% respectively previously published reference map. total 16 traits, including mass, equatorial diameter, juice percentage, soluble solids, acidity, pH, glucose, fructose, sucrose, citric malic acid concentrations evaluated at three maturation dates. High variations indicating transgressive found all normal or close distributions. analysis multiple model allowed 34 QTLs maps. distributed different generally detected only one date phase. The percentage variation explained ranged 37% per QTL. Major R 2 ≥ 30%) fructose (expressed dry matter) 8 9. Co-localization controlling correlated uncorrelated mainly 2, 4, 8, 9, particularly mass acidity.