Resumo

VALERA-MONTERO, Luis Lorenzo; HERNANDEZ-DAVILA, Adriana; SILOS-ESPINO, Héctor  e  FLORES-BENITEZ, Silvia. Genetic variation in guava using RAPDs and morphological descriptors in Calvillo Aguascalientes. Rev. Mex. Cienc. Agríc [online]. 2017, vol.8, n.1, pp.67-77. ISSN 2007-0934.  https://doi.org/10.29312/remexca.v8i1.72.

The fruits and leaves of 140 randomly selected guava trees from the same number of orchards of Calvillo, Aguascalientes were sampled in the period 2012-2013 in order to obtain RAPD type molecular markers and to compare them with fruit and leaves morphological descriptors of selected individuals by phenograms. The similarity found for the morphology data ranges from 87 to 100%, while the similarity for the RAPD data ranged from 25 to 100%. To the five main clades generated with the data of fruit and leaf morphology, it was not possible to associate them with the bands generated by RAPD. Therefore, analyzes of both types of data were performed separately. Even so, it is considered that the RAPD technique can be used to characterize outstanding guava genotypes that may be useful in the assisted genetic improvement programs of this species in Mexico. The case of having orchards with an acceptable degree of uniformity is not ruled out in order to have a recognizable genetic profile that can lead to the authenticity of the origin of the fruits of the orchard.

Palavras-chave : Psidium guajava; genetic diversity; guava; RAPD.