Genetic diversity and landscape genetic structure of Capsicum annuum L., from wild, backyard and cultivated populations in a heterogeneous environment in Oaxaca, Mexico

Diversidad genética y estructura genética del paisaje de Capsicum annuum L., de poblaciones silvestres, de traspatio y cultivadas en un ambiente heterogéneo en Oaxaca, México

  • Juan Manuel Peñaloza Ramirez El Centro de Estudios de Desarrollo Sustentable y Aprovechamiento de la Vida Silvestre. CEDESU Universidad Autónoma de Campeche UAC
  • Ricardo Toxqui-Tapia
  • Antonio Pacheco Olvera
  • Ana Luisa Albarran Lara
  • Ken Oyama Nakawa
Palabras clave: C. annuum, domestication process, genetic diversity, population bottlenecks, effective population size., en

Resumen

Domesticated species, have been exposed during their evolution to pressures that occurred at different intensities and regulate the variation of genetic structure, phenotypic and divergence among cultivated and wild populations. We analyzed, the genetic diversity, structure, inbreeding, effective population size, population bottlenecks and the ecological niche divergence, of wild, backyard and cultivated populations of Capsicum annuum. We analyzed, 13 populations across Oaxaca, Mexico, using nuclear microsatellite markers. C. annuum, shown higher levels of genetic diversity in wild, backyard and cultivated populations. That indicated, a strong selection occurred at different phenotypes could generate genetically diverse materials that has favored population adaptation to specific locations and environments. Domesticated chiles, in traditional agricultural habitats harbor unique gene pools and thus act as genetic variation reservoirs and to conserve biodiversity. The genetic inbreeding and the effective population size is not too low to genetic harmful. It is necessary, initiate programs to select chile varieties, to rescuing some interesting traits, to expand the genetic base of crops. The inclusion, of genetically diverse germplasm can be utilized to breeding programs through the selection of features of interest. Genetic differentiation, was moderated in populations of C. annuum, we detected four geographic regions with a genetic structuring for populations of C. annum. We could suggest that in chile populations, a strong selection could generate genetically divergent materials. We suggested, that climatic complexity and altitudinal gradients in Oaxaca state, could encouraging diversification for chile diversity and domestication.

Citas

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Publicado
2022-02-14
Cómo citar
Peñaloza Ramirez, J., Toxqui-Tapia, R., Pacheco Olvera, A., Albarran Lara, A., & Oyama Nakawa, K. (2022). Genetic diversity and landscape genetic structure of Capsicum annuum L., from wild, backyard and cultivated populations in a heterogeneous environment in Oaxaca, Mexico. POLIBOTÁNICA, 1(53). https://doi.org/10.18387/polibotanica.53.6
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