New stable QTLs for berry firmness in table grapes

José Correa, Maribel Mamani, Claudia Muñoz-Espinoza, Mauricio González-Agüero, Bruno G. Defilippi, Reinaldo Campos-Vargas, Manuel Pinto, Patricio Hinrichsen

Resultado de la investigación: Contribución a una revistaArtículo

6 Citas (Scopus)


Berry firmness is one of the most important quality traits in table grape production and, consequently, a key aspect for table grape breeding programs. To identify the genes determining the berry firmness in grapes, a progeny of Ruby Seedless × Sultanina (n = 137) was evaluated during three consecutive seasons. Results showed that even though the heritability was ~90%, season had an important effect on this trait. Quantitative trait loci (QTL) analysis and genetic mapping showed that the determinants for this trait are distributed in linkage groups 8 and 18. This is the first time that a stable QTL for berry firmness across seasons has been identified on linkage group 8. This QTL is mainly given by a male allelic and additive effect. Together, these two QTLs explained ~27.6% of the phenotypic variance, with confidence intervals of up to 10 cM. Among the tens of genes found in these two QTLs, we highlight a cation/calcium exchanger, a xylosyltransferase, a probable cellulose synthase, and a putative invertase. This study shows that berry firmness has a clear genetic basis. These results could also be used for the development of markers to assist table grape breeding.

Idioma originalInglés
Páginas (desde-hasta)212-217
Número de páginas6
PublicaciónAmerican Journal of Enology and Viticulture
EstadoPublicada - 1 abr 2016

Áreas temáticas de ASJC Scopus

  • Alimentación
  • Horticultura

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    Correa, J., Mamani, M., Muñoz-Espinoza, C., González-Agüero, M., Defilippi, B. G., Campos-Vargas, R., Pinto, M., & Hinrichsen, P. (2016). New stable QTLs for berry firmness in table grapes. American Journal of Enology and Viticulture, 67(2), 212-217.