Tolerancia al calor en Solanum lycopersicum var. cerasiforme comercial y Solanum spp. silvestre, según análisis de marcadores tipo RAPD y genes específicos, y su relación con la productividad
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Fecha
2017
Autores
Blanco Vargas, Marilyn
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Universidad Nacional (Costa Rica)
Resumen
El cambio climático genera alteraciones en las condiciones ambientales que repercuten en los diferentes organismos. En las plantas, la búsqueda de genotipos con loci asociados a la tolerancia al calor resulta necesaria. El objetivo de esta investigación fue evaluar marcadores RAPDs y genes específicos en Solanum lycopersicum var. cerasiforme tolerantes al calor según parámetros de rendimiento y calidad, para su posterior asociación en Solanum spp. silvesfre con el fin de contribuir con el manejo de los recursos naturales. Para esto, se analizaron 15 genotipos de origen comercial (Solanum lycopersicum var. cerasiforme) y diez muestras de origen del género Solanum, las cuales se evaluaron con marcadores moleculares tipo RAPDs asociados a tolerancia al calor en Solanum, y genes específicos por medio de análisis de alta resolución de fusión (HRM). Los datos genéticos de los genotipos comerciales se vincularon con información de rendimiento y calidad. En el caso de los genotipos silvestres, se realizó un análisis de correlación entre la distancia genética y la distancia geográfica. El análisis con RAPDs reveló una alta diversidad genética en los materiales de origen silvestre y patrones homogéneos para el material comercial; ni los RAPDs ni la amplificación de genes específicos por PCR punto final pudieron revelar diferencias las La técnica de HRM permitió diferenciar genotipos comerciales tolerantes, susceptible e intermedios. En el caso del material silvestre, la técnica de HRM permitió una diferenciación genética de especies. La vinculación de datos genéticos con parámetros de rendimiento y calidad, reveló que únicamente se dio una asociación con el peso total de la cosecha o rendimiento total (kg/planta). No se observó una correlación entre la distancia genética y la distancia geográfica de las muestras silvestres. Se concluyó que el desarrollo de análisis genéticos con materiales de origen comercial es una viable, que facilita posteriormente el estudio del potencial y la riqueza genética que albergan las especies silvestres. De modo que la integración de estos elementos contribuye al conocimiento, la protección, la conservación y el manejo de los recursos naturales.
Climate change generates alterations in environmental conditions that affect different organisms. In plants, the search for genotypes with loci associated with heat tolerance is necessary. The objective of this research was to evaluate RAPDs markers and specific genes in Solanum lycopersicum var. heat tolerant cerasiform according to performance and quality parameters, for their subsequent association in Solanum spp. silvesfre in order to contribute to the management of natural resources. For this, 15 genotypes of commercial origin (Solanum lycopersicum var. cerasiforme) and ten samples of origin of the genus Solanum were analyzed, which were evaluated with RAPDs-type molecular markers associated with heat tolerance in Solanum, and specific genes through analysis. high resolution fusion (HRM). The genetic data of the commercial genotypes were linked with yield and quality information. In the case of wild genotypes, a correlation analysis between genetic distance and geographic distance was performed. The analysis with RAPDs revealed a high genetic diversity in the materials of wild origin and homogeneous patterns for the commercial material; neither the RAPDs nor the amplification of specific genes by endpoint PCR could reveal differences between the The HRM technique allowed differentiation between tolerant, susceptible and intermediate commercial genotypes. In the case of wild material, the HRM technique allowed a genetic differentiation of species. The linkage of genetic data with yield and quality parameters revealed that there was only an association with the total weight of the harvest or total yield (kg/plant). No correlation was observed between genetic distance and geographic distance in wild samples. It was concluded that the development of genetic analysis with materials of commercial origin is viable, which subsequently facilitates the study of the potential and genetic richness of wild species. So the integration of these elements contributes to the knowledge, protection, conservation and management of natural resources.
Climate change generates alterations in environmental conditions that affect different organisms. In plants, the search for genotypes with loci associated with heat tolerance is necessary. The objective of this research was to evaluate RAPDs markers and specific genes in Solanum lycopersicum var. heat tolerant cerasiform according to performance and quality parameters, for their subsequent association in Solanum spp. silvesfre in order to contribute to the management of natural resources. For this, 15 genotypes of commercial origin (Solanum lycopersicum var. cerasiforme) and ten samples of origin of the genus Solanum were analyzed, which were evaluated with RAPDs-type molecular markers associated with heat tolerance in Solanum, and specific genes through analysis. high resolution fusion (HRM). The genetic data of the commercial genotypes were linked with yield and quality information. In the case of wild genotypes, a correlation analysis between genetic distance and geographic distance was performed. The analysis with RAPDs revealed a high genetic diversity in the materials of wild origin and homogeneous patterns for the commercial material; neither the RAPDs nor the amplification of specific genes by endpoint PCR could reveal differences between the The HRM technique allowed differentiation between tolerant, susceptible and intermediate commercial genotypes. In the case of wild material, the HRM technique allowed a genetic differentiation of species. The linkage of genetic data with yield and quality parameters revealed that there was only an association with the total weight of the harvest or total yield (kg/plant). No correlation was observed between genetic distance and geographic distance in wild samples. It was concluded that the development of genetic analysis with materials of commercial origin is viable, which subsequently facilitates the study of the potential and genetic richness of wild species. So the integration of these elements contributes to the knowledge, protection, conservation and management of natural resources.
Descripción
Blanco Vargas, M. (2017). Tolerancia al calor en Solanum lycopersicum var. cerasiforme comercial y Solanum spp. silvestre, según análisis de marcadores tipo RAPD y genes específicos, y su relación con la productividad. [Tesis de Licenciaura]. Universidad Nacional, Heredia, C.R.
Palabras clave
AGRICULTURA, AGRICULTURE, CAMBIO CLIMATICO, CLIMATE CHANGE, LYCOPERSICON ESCULENTUM, EVALUACION, ADN, GENOTIPOS, SOLANACEAE, TOMATES