Recently, scientists from the Instituto Universitario de Conservación y Mejora de la Agrodiversidad Valenciana provided additional information on the history and domestication of tomato using Procrustes analysis and automatic classification (Fig. 1).

In this study, scientists developed a novel method to perform genome-wide haplotype analysis by combining Procrustes-aligned PCoA output with unsupervised automatic classification. This new method allowed a detailed and quantitative inspection of the haplotypic composition of each accession and population. The results of the PCoA haplotype, in agreement with those of fastStructure, suggest the existence of three types of haplotypes (hPe, hEc and hSL) related to the main taxonomic groups of tomato.

The new analysis method based on Procrustes and the automatic classification of haplotypes allowed the researchers to propose a new hypothesis for the complex evolution of wild and cultivated tomato plants. Wild populations were Peruvian and Ecuadorian Solanum pimpinellifolium and mesoamerican Solanum lycopersicum var. cerasiform (SLC). After migrating to Ecuador and Peru, SLC was domesticated and the Mexican Solanum lycopersicum var. lycopersium was derived from these improved materials. This model is supported by traditional population genetic indices, parametric statistical models, morphological and passport data and the new haplotype analysis. Researchers have identified genomic regions associated with the latitudinal migration undergone by tomato plants that will be useful in adapting currently grown varieties to new latitudes, especially in a world affected by climate change. “Similar approaches can be used to study the complex domestication histories of other species.said Professor Jose Blanca.




Jose Blanca1,*David Sanchez-Matarredona1Peio Ziarsolo1Javier Montero Pau1Esther van der Knaap2,3My Jose Diez1 and Joaquin Cañizares1


1 Instituto Universitario de Conservación y Mejora de la Agrodiversidad Valenciana, COMAV, Universitat Politècnica de València, Valencia 46022, Spain

2 Institute of Plant Breeding, Genetics and Genomics, University of Georgia, Athens, GA 30602, USA

3 Department of Horticulture, University of Georgia, Athens, GA 30602, USA

About Dr. Jose Blanca

Professor Jose Blanca works at the Instituto Universitario de Conservación y Mejora de la Agrodiversidad Valenciana and has published 160 articles to date.

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