Examinando por Autor "Bendezu, Jorge"
Mostrando 1 - 2 de 2
- Resultados por página
- Opciones de ordenación
Ítem Morphological and molecular characterization of an Elaeis oleifera (H.B.K) Cortes germplasm collection located in Ucayali, Peru(Public Library of Science, 2021-05-06) Camacho Villalobos, Alina Alexandra; Serna Chumbes, Manuel Fernando; Flores Jaramillo, Jhoffre David; Flores, Hector; Manrique, Paulo; Bendezu, JorgeThe African oil palm (Elaeis guineensis Jacq) is a crop that is widely distributed in tropical regions around the world; however, this crop is subject to limitations such as rapid trunk growth and susceptibility to bud rot and red ring diseases particularly in South America. To overcome these limitations, national breeding and conservation programs have been established, and there is a need to identify parental palms from natural populations of the American oil palm (E. oleifera H.B.K. Cortes) with desirable yield and morphological traits (i.e., yield production and bunch number) and with high genetic diversity. However, in Peru the morphological and genetic data related to this important crop is limited. In this study, we characterized the morphological and yield and estimated the genetic diversity using 12 neutral microsatellite markers (simple sequence repeats, SSRs) across 72 oil palm individuals belonging to the E. oleifera germplasm collection located in the tropical region of Ucayali, Peru. Our results showed that morphological and yield traits explained approximately 40.39% of the variability within the Peruvian germplasm. Furthermore, Yield Production was highly correlated with two yield traits: Bunch Number (0.67) and Average weight per bunch (0.78). Based on the yield and morphological traits, a clustering analysis was performed and three phenotypic groups were identified (1, 2 and 3) in which groups 1 and 3 showed high scores associated primarily with yield traits. Microsatellite markers revealed 143 alleles, 11.92 ± 4.72 alleles per locus (A) and an expected heterozygosity (He) of 0.69 ± 0.045. A structural analysis identified three populations (k = 3), that were not related to the phenotypic groups. Interestingly, a multiple allele background was identified within the groups using multilocus and phylogenetic relationship analyses. This is the first Peruvian report regarding E. oleifera that shows preliminary data of the morphological and yield traits and genetic data, and highlight the importance of this information to set up future steps to national breeding strategies and improve the conservation of genetic material of E. oleifera. Overall, these novel findings could contribute to the development of the local oil palm industry in Peru.Ítem SNP profiling of Elaeis oleifera (H.B.K) cortes germplasm in Ucayali, Peru using genotyping-by-sequencing (GBS)(Springer Nature, 2025-07-17) Camacho Villalobos, Alina Alexandra; Mestanza, Orson; Cabrera Pintado, Rosa María; Sanchez Sunción, Glendy; Bendezu, JorgeObjectives Elaeis oleifera, commonly known as the American oil palm, plays a crucial role in the agricultural economies of Central and South America due to its unique oil characteristics and resistance to certain diseases. Despite its importance, limited available genetic information has hindered the effective utilization of this species in breeding programs aimed at improving oil yield and disease resistance. This study employed Genotyping-bySequencing (GBS) to profile polymorphisms within Elaeis oleifera populations, the unique germplasm bank for Peru, located in Ucayali, Peru, aiming to characterize the gene pool. Data description The GBS analysis successfully identified 22,703 informative single-nucleotide polymorphisms (SNPs) across the twelve-year-old plant genomes (n=42). Observed heterozygosity (Ho=0.3086) and expected heterozygosity index (He=0.3385) were quantified. The fixation index (Fst=0.0048) indicated low genetic differentiation within the germplasm. However, the presence of two genetic clusters (C_1 and C_2) distributed homogenously within the studied population has been detected; the origin of these clusters could be mainly associated with the initial management of the germplasm nucleus within Peru. The extensive SNP dataset provides a comprehensive genetic map that is invaluable for the conservation and enhancement of Elaeis oleifera in our region.