Peach flesh color is a monogenic trait, with the white phenotype being dominant over the yellow; its expression is supposed to be determined by a carotenoid degradative enzyme. In the present study, a carotenoid cleavage dioxygenase (ccd4) gene was analyzed to test whether it can be responsible for the flesh color determinism. The analysis was conducted on chimeric mutants with white and yellow sectors of the fruit mesocarp; it was then extended to a pool of cultivars and a segregating F1 population. A functional allele, W1 resulted associated with the white flesh trait, and three independent mutations cause the Yellow phenotype: a 2 bp insertion within a repetitive sequence (y1), a large transposable element within the intron (y2) and a single base substitution generating a premature stop codon (y3). Based on these evidences, the yellow flesh phenotype seems to have arisen from at least three independent mutational events of the ccd4 gene.
|Autori:||Adami, M.;De Franceschi, P.;Brandi, F.;Liverani, A.;Giovannini, D.;Rosati, C.;Dondini, L.;Tartarini, S.|
|Data di pubblicazione:||2013|
|Titolo:||Scoperto il gene che determina il colore bianco o giallo delle pesche|
|Rivista:||RIVISTA DI FRUTTICOLTURA E DI ORTOFLORICOLTURA|
|Appare nelle tipologie:||1.1 Articolo in rivista|