42
views
0
recommends
+1 Recommend
1 collections
    0
    shares
      • Record: found
      • Abstract: found
      • Article: found
      Is Open Access

      Avances y perspectivas sobre el estudio del origen y la diversidad genética de Capsicum spp. Translated title: Advances and perspectives about the study of the origin and genetic diversity of Capsicum spp.

      research-article

      Read this article at

      Bookmark
          There is no author summary for this article yet. Authors can add summaries to their articles on ScienceOpen to make them more accessible to a non-specialist audience.

          Abstract

          En este trabajo se analizan los estudios sobre el análisis filogenético y la diversidad del género Capsicum especialmente de aquellos con un enfoque molecular. Además, se analizan las perspectivas sobre el conocimiento de la filogenia, la diversidad y las relaciones genéticas, con énfasis en los recursos genéticos de Capsicum silvestre y cultivado de México. Los estudios en Capsicum han enfatizado el análisis de la evolución y la filogenia del género; así como las relaciones genéticas, niveles de variabilidad genética y de diversidad Ínter e intraespecífica, con germoplasma de ciertas regiones, especies o condiciones genéticas (especies, subespecies, variedades, variedades criollas, silvestres). Los estudios han identificado centros de origen y de diversidad de Capsicum, ancestros comunes de las especies cultivadas, patrones probables de dispersión y de diversificación del género y las relaciones genéticas, estructuración genética y patrones de diversidad de germoplasma silvestre, criollo y mejorado de chile de colecciones con orígenes variados. No obstante los avances, es evidente que los esfuerzos han sido focalizados o restringidos al origen del germoplasma utilizado en cada trabajo, de modo que es frecuente el sesgo o el panorama parcial del contexto analizado. Este análisis permite concluir que es necesario que los futuros trabajos sobre origen, evolución y diversidad de Capsicum enfaticen el estudio a niveles más complejos y que incluyan poblaciones representativas del género y/o especies a estudiar, para así evitar incongruencias y obtener reconstrucciones filogenéticas, estructuras genéticas de poblaciones y/o estimaciones de diversidad genética Ínter y/o intraespecíficas precisas y robusta.

          Translated abstract

          In this work we analyzed the research about phylogey and genetic diversity in Capsicum genus mainly those with a molecular emphasis. In addition, we analyze perspectives of these reviewed advances based on the knowledge about phylogeny, genetic diversity and genetic relationships with the emphasis on Capsicum genetic re-sources from México. Works conducted in Capsicum emphasize the analysis of evolution and phylogeny into the genus as well as the analysis of genetic relationships and the levels of genetic variability and Ínter and intra-specific diversity using germplasm from some regions, species or genetic status (species, sub-species, cultivars, landraces, wild germplasm). These studies have identified the origin and diversity centers of Capsicum, the common ancestors of some cultivated species, the most probable dispersión and diversification patterns and the genetic relations, genetic structure and diversity patterns of wild, landrace and breed pepper germplasm with varied origins. Despite advances, it is evident that efforts have been focused or restricted by germplasm origins in each work, so that is frequent the bias or the partial overview of analyzed context. Our analysis let conclude that further works about Capsicum origin, evolution and diversity must emphasizes the study to the most complex levels including representative populations of the genus/species to be studied in order to avoid contradictions and then can obtain more precise and robust phylogenetic re-constructions, genetic structure of populations and/or calculations of Ínter and/or intra-species genetic diversity levels data.

          Related collections

          Most cited references72

          • Record: found
          • Abstract: found
          • Article: not found

          Conservation of gene repertoire but not gene order in pepper and tomato.

          Homologies of tomato and pepper genes have been compared, and genetic linkage maps have been constructed based on a common set of cDNA clones and selected single-copy genomic clones. We report here that the gene repertoire of these two species is highly conserved, yet the linear order of the genes on the chromosomes has been greatly modified. Although the two species share the same number of centromeres, the chromosomal regions around those centromeres have undergone extensive rearrangements. Accompanying the extensive chromosome rearrangement has been a change in locus number for approximately 12% of the loci detected by random cDNA clones. Duplicated loci within each genome are normally found on different chromosomes and are not confined to one species, thus ruling out gene duplication as an explanation for the 4-fold higher DNA content of pepper. At least one of the duplications occurred since the divergence of tomato and pepper from their last common ancestor.
            Bookmark
            • Record: found
            • Abstract: not found
            • Article: not found

            Relationships Between Weedy and Cultivated Forms in Some Species of Chili Peppers (Genus capsicum)

              Bookmark
              • Record: found
              • Abstract: found
              • Article: not found

              Complete sequencing and comparative analyses of the pepper (Capsicum annuum L.) plastome revealed high frequency of tandem repeats and large insertion/deletions on pepper plastome.

              Plants in the family Solanaceae are used as model systems in comparative and evolutionary genomics. The complete chloroplast genomes of seven solanaceous species have been sequenced, including tobacco, potato and tomato, but not peppers. We analyzed the complete chloroplast genome sequence of the hot pepper, Capsicum annuum. The pepper chloroplast genome was 156,781 bp in length, including a pair of inverted repeats (IR) of 25,783 bp. The content and the order of 133 genes in the pepper chloroplast genome were identical to those of other solanaceous plastomes. To characterize pepper plastome sequence, we performed comparative analysis using complete plastome sequences of pepper and seven solanaceous plastomes. Frequency and contents of large indels and tandem repeat sequences and distribution pattern of genome-wide sequence variations were investigated. In addition, a phylogenetic analysis using concatenated alignments of coding sequences was performed to determine evolutionary position of pepper in Solanaceae. Our results revealed two distinct features of pepper plastome compared to other solanaceous plastomes. Firstly, large indels, including insertions on accD and rpl20 gene sequences, were predominantly detected in the pepper plastome compared to other solanaceous plastomes. Secondly, tandem repeat sequences were particularly frequent in the pepper plastome. Taken together, our study represents unique features of evolution of pepper plastome among solanaceous plastomes.
                Bookmark

                Author and article information

                Contributors
                Role: ND
                Role: ND
                Role: ND
                Role: ND
                Journal
                era
                Ecosistemas y recursos agropecuarios
                Ecosistemas y recur. agropecuarios
                Universidad Juárez Autónoma de Tabasco, Dirección de Investigación y Posgrado (Villahermosa )
                2007-901X
                April 2015
                : 2
                : 4
                : 117-128
                Affiliations
                [1 ] Instituto Politécnico Nacional México
                [2 ] Instituto Politécnico Nacional México
                [3 ] Universidad Juárez Autónoma de Tabasco México
                [4 ] Instituto Nacional de Investigaciones Forestales, Agrícolas y Pecuarias México
                Article
                S2007-90282015000100009
                8228149c-850f-4057-813c-6d36a48514bc

                http://creativecommons.org/licenses/by/4.0/

                History
                Categories
                Biodiversity Conservation
                Environmental Studies

                Environmental studies,Animal science & Zoology
                Phylogenetic analysis,chili-pepper,genetic diversity,México,origin and domestication,Análisis filogenético,chile,diversidad genética,origen y domesticación

                Comments

                Comment on this article