DIVERSIDAD GENÉTICA EN PITAHAYA (Hylocereus undatus Haworth. Britton y Rose)

Abstract

Se evaluó la variabilidad genética con marcadores RAPD (Polimorfismos en el ADN Amplificados al Azar) en 50 colectas de pitahaya (Hylocereus undatus Haworth, Britton and Rose) provenientes de nueve estados de México y una colecta de Colombia que se incluyó como testigo. Se detectó alta variabilidad genética (polimorfismo entre colectas de 92.5 %) en las poblaciones de pitahaya. Las huellas genéticas obtenidas permitieron la identificación individual de cada material genético. La colecta de Colombia se agrupó con la mayoría de las colectas mexicanas, lo que indica un origen común. Adicionalmente, se detectó un grupo de materiales procedente de los estados de Hidalgo, México y San Luis Potosí que difiere del resto de las colectas en su genotipo RAPD, lo que sugiere que en México existe variabilidad genética endémica y que el país es uno de varios centros de diversidad de H. undatus.

Agrodiversity of Hylocereus undatus in Maya Homegardens: Management and Genetic Variability

“…At least two genetic variants, coinciding with the two documented genetic groups, were present in the homegardens of Yucatan; those in the Central and West regions are of special interest. Among the individuals of these two groups, genetic differentiation ranges from 0.002-0.8465 (Figure 3c), values that are comparable to those estimated in the analysis of genetic differentiation of Mexican wild accessions from the entire distribution of H. undatus in the country (Legaria-Solano et al 2005). Genetic differ-entiation values in this study were higher than those recorded from a reference germplasm collection of the genus maintained at the University of California, in which the distances from a group of genetically improved variants and a group of wild accessions of dragonfruit were estimated in 0.1 changes using AFLP molecular markers (Pagliaccia et al 2015).…”

“…Genetic relationships were inferred using a Bayesian grouping approach (Pritchard et al 2000). Consensus dendrograms were obtained for Nei's genetic distances among populations and regions (Nei 1978) as described by Tel-Zur et al (2004) and for Jaccard coefficient among individuals as described by Legaria-Solano et al (2005). Detailed information of estimations for statistics is included in Supplement 2.…”

“…The PIC values were compared to those from a germplasm collection of 51 cultivated lines and wild accessions of H. undatus and H. polyrhizus (Tao et al 2014). The ranges of genetic distances were compared to those obtained for germplasm collections of: i) 230 cultivated lines and wild accessions of eight species and hybrids from them (Pagliaccia et al 2015); and ii) wild populations of H. undatus throughout its distribution in Mexico (Legaria-Solano et al 2005).…”

Pitaya Nutrition, Biology, and Biotechnology: A Review

“…Further, UPGMA analysis classified the 15 genotypes into three groups. Legaria Solano et al [ 215 ] also used RAPD markers to test 50 pitaya germplasm collected from nine states in Mexico and one from Columbia. Polymorphism at 92% is attributed to the high genetic variability among different regions.…”

Elements to improve the management and commercialization of dragon fruit (Hylocereus undatus (Haworth) D.R. Hunt)

“…Dragon fruit (Hylocereus undatus) is native to southeastern Mexico and Central America (Zee et al, 2004;Legaria et al, 2005), although currently its commercial cultivation has been expanded to Southeast Asia, Europe, and the United States, where it is consumed more than in Mexico. From 2009 to 2019, the production of dragon fruit (Hylocereus undatus) in Mexico was carried out in the states of Yucatán, Quintana Roo, Puebla, Nayarit, Tabasco, Guerrero, Sinaloa, and Nuevo León (SIAP, 2020).…”