Chemical markers to distinguish the homoand heterozygous bitter genotype in sweet almond kernels
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Autor/a
Vichi, Stefania
Mayer, Morgana N.
León-Cárdenas, Maria G.
Quintanilla-Casas, Beatriz
Tres, Alba
Guardiola, Francesc
Romero, Agustí
Fecha de publicación
2020-06-05ISSN
2304-8158
Resumen
Bitterness in almonds is controlled by a single gene (Sk dominant for sweet kernel, sk recessive for bitter kernel) and the proportions of the offspring genotypes (SkSk, Sksk, sksk) depend on the progenitors’ genotype. Currently, the latter is deduced after crossing by recording the phenotype of their descendants through kernel tasting. Chemical markers to early identify parental genotypes related to bitter traits can significantly enhance the efficiency of almond breeding programs. On this basis, volatile metabolites related to almond bitterness were investigated by Solid Phase Microextraction-Gas Chromatography-Mass Spectrometry coupled to univariate and multivariate statistics on 244 homo- and heterozygous samples from 42 different cultivars. This study evidenced the association between sweet almonds’ genotype and some volatile metabolites, in particular benzaldehyde, and provided for the first time chemical markers to discriminate between homo- and heterozygous sweet almond genotypes. Furthermore, a multivariate approach based on independent variables was developed to increase the reliability of almond classification. The Partial Least Square-Discriminant Analysis classification model built with selected volatile metabolites that showed discrimination capacity allowed a 98.0% correct classification. The metabolites identified, in particular benzaldehyde, become suitable markers for the early genotype identification in almonds, while a DNA molecular marker is not yet available.
Tipo de documento
Artículo
Versión del documento
Versión publicada
Lengua
Inglés
Materias (CDU)
663/664 - Alimentos y nutrición. Enología. Aceites. Grasas
Páginas
13
Publicado por
MDPI
Publicado en
Foods
Citación
Vichi, Stefania, Morgana N. Mayer, Maria G. León-Cárdenas, Beatriz Quintanilla-Casas, Alba Tres, Francesc Guardiola, Ignasi Batlle, and Agustí Romero. 2020. "Chemical Markers To Distinguish The Homo- And Heterozygous Bitter Genotype In Sweet Almond Kernels". Foods 9 (6): 747. doi:10.3390/foods9060747.
Número del acuerdo de la subvención
INIA/Programa Estatal de I+D+I orientada a los retos de la sociedad/RTA2011-00130-00-00/ES/Mejora de variedades de almendro/
INIA/Programa Estatal de I+D+I orientada a los retos de la sociedad/RTA2017-00084-00-00/ES/Mejora genética de variedades de almendro/
INIA/Programa Estatal de I+D+I orientada a los retos de la sociedad/AGL2013-48577-C2-2-R/ES/Mejora genética del almendro/
Program
Fructicultura
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