Phenotypic and genetic characterization of four species of the Solanum genera, Lycopersicon section
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Abstract
the most economically important vegetable worldwide and
one of the most consumed vegetable in the world. It’s wild
relatives are native of various habitats ranging from Ecuador,
Peru, and Chile and have been employed to generate varieties
adapted to specific biotic and abiotic factors worldwide. In
order to evaluate the morphological and genetic variation
in the germplasm collection at the National University of
Loja (UNL) in Ecuador, four wild species were selected:
Solanum pimpinellifolium, Solanum neorickii, Solanum
habrochaites, Solanum lycopersicum var. cerasiforme. With
the morphological variables (20 quantitative, 20 qualitative)
phenotypic differences in vegetative components and related
to flower and fruit were detected. Only S. habrochaites
was differentiated based on these variables. The diversity
and genetic structure of the species were evaluated with 17
microsatellite loci. In spite of none of the variability indexes
showed statistically significant differences due to the large
variance presented, the species S. neorickii exhibited the
lowest genetic variability values. The individual genetic
distances, the number of groups genetically structured and
the genetic differentiation (FST) were congruent and revealed
four groups corresponding to each species tested.
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