Single and joint effect of the basal region of chromosome 2 and centromeric region of chromosome 8 on morphological and fruit quality traits in tomato

GREEN, GISELA YAEL; PEREIRA DA COSTA, JAVIER H; CAMBIASO, VLADIMIR; PRATTA, GUILLERMO RAUL; ZORZOLI, ROXANA; RODRÍGUEZ, GUSTAVO RUBÉN

EUPHYTICA

SPRINGER

Lugar: Berlin; Año: 2016 vol. 210 p. 327 - 339

0014-2336

Thegoal of this study was to estimate the single and joint effect of the basalregion of chromosome 2 and centromeric region of chromosome 8 on morphologicaland fruit quality traits in tomato (Solanumlycopersicum). The analysis was performed in a population derived from across between Rio Grande of S.lycopersicum and LA1589 of S.pimpinellifolium that segregates for both genomic regions. Four major QTLswere found on chromosome 2 and three on chromosome 8, all of them related withmorphological traits. QTLs for fruit shape index, proximal fruit end angle anddistal fruit end protrusion showed epistatic interaction. Both genomic regions (fs2.1 and fs8.1) explained 62%, 47% and 46% of the phenotypic variability forfruit shape index, proximal fruit end angle and distal fruit end protrusionrespectively. Minor QTLs were detected for other morphological and qualitytraits such as color, pH and fruit shelf life on chromosomes 2 and 8. Only singlegenomic region effects were found for quality trait. On the other hand, fs2.1 and fs8.1 regions control several fruit morphology attributes followinga digenic linear additive model with epistatic interactions.