Papers by Karina Castillo
Applications in Plant Sciences, 2014
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Understanding the driving forces and molecular processes underlying dioecy and sex chromosome evo... more Understanding the driving forces and molecular processes underlying dioecy and sex chromosome evolution, leading from hermaphroditism to the occurrence of male and female individuals, is of considerable interest in fundamental and applied research. The genus Phoenix, belonging to the family Arecaceae, consists of only dioecious species. Phylogenetic data suggests that the genus Phoenix diverged from a hermaphroditic ancestor shared with its closest relatives. Here we investigated the evolution of suppressed recombination within the genus Phoenix as a whole by extending the analysis of P. dactylifera sex-related loci to eight other species within the genus. We also performed a phylogenetic analysis of a date palm sex-linked PdMYB1 gene in these species. We found that X and Y sex-linked alleles clustered in a species-independent fashion. Our data show that sex chromosomes evolved before the diversification of the extant dioecious species. Furthermore, the distribution of Y haplotypes ...
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The date palm (Phoenix dactylifera L.) has great socioeconomic and ecologic importance in the ari... more The date palm (Phoenix dactylifera L.) has great socioeconomic and ecologic importance in the arid and semi arid zones of Maghreb and Middle East. The genetic resources of this species are threatened by clonal propagation and factors such as diseases, drought and soil salinization. To organize the conservation of date palm germplasm, it is imperative to characterize the genetic diversity. We propose an integrated solution for date palm genotyping which includes three major components. The first one is the creation of an « identification key » based on a new optimized microsatellite markers set, validated on a large sampling representing the genetic diversity of the species. The second one is a « reference library » consisting of genotype information from a collection of 150 major Phoenix dactylifera cultivars. The third component is « PhoenixDB », a bioinformatic tool consisting of a database that stores the reference library and complementary information relative to the genotypes a...
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New Phytologist, 2013
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Applications in Plant Sciences, 2014
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Annals of Botany, 2015
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Papers by Karina Castillo