Publication date: 21-06-2019

Workshop on Molecular Mechanisms controlling flower development - Cote d’Azur, FRANCE JUNE 2019

Transcriptomics from dormancy to flowering in temperate fruit species, the case of almond.

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Evolution of fruit and seed traits during almond naturalization.

Publication date: 25-12-2021

Authors: Andrés Barea-Márquez,Francisco J. Ocaña-Calahorro,Rodrigo Balaguer-Romano,José María Gómez,Eugene W. Schupp,Raquel Sánchez-Pérez,Jesús Guillamón,Joanna Zhang,Rafael Rubio de Casa

Journal: Journal of Ecology

ABSTRACT: Cultivated plant species often naturalize and enter wild communities in a process known as feralization. To successfully feralize, crops must overcome ecological barriers and may undergo selection on certain traits, diverging phenotypically and genetically from their crop ancestors. In spite of the agronomic and eco-logical relevance of crop feralization, the eco- evolutionary dynamics driving it remain understudied.2. In this paper, we evaluated phenotypic and genotypic differentiation in fruit and seed traits during the naturalization of the almond tree (Prunus dulcis (Mill.) D.A. Webb) in SE Iberia and evaluated the potential role of natural selection in this process. To do so, we investigated the patterns of genetic divergence between cultivated and feral populations using functional (the cyanogenesis Sk gene) and neutral (17 SSR loci) markers and analysed morphological and biochemical traits in kernels of 342 individuals from 15 cultivated and 24 feral populations.3. We detected very little genetic differentiation in neutral markers between cul-tivated and feral populations. The majority of the observed genetic variation was due to differences within each type. Conversely, the recessive allele sk re-sponsible for seed toxicity was significantly more frequent in feral populations. Phenotypic differentiation between cultivated and naturalized almond popula-tions was also significant. Feral almond kernels were smaller and lighter, had denser and more resistant shells (endocarps) and more toxic seeds. Selection analyses indicated that these genetic and phenotypic patterns might be driven by directional selection on fruit and seed traits, potentially linked to defence against predation.

DOI: https://doi.org/10.1111/1365-2745.13831

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10th INTERNATIONAL ROSACEAE GENOMICS CONFERENCE - Barcelona (Spain)

THE ALMOND GENOME: MUTATION OF A BHLH TRANSCRIPTION FACTOR AS BASIS FOR DOMESTICATION (Keynote speaker).

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Mutation of a bHLH Transcription Factor Allowed Almond Domestication (Invited speaker).

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Special Issue Agronomy: Domestication and Transcription Factors

https://www.mdpi.com/journal/agronomy/special_issues/Domestication_Transcription_Horticulture

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