Abstract

ARRIETA RAMOS, B.G. et al. Morfologic variability of chicozapote from Nayarit, México. Polibotánica [online]. 2020, n.49, pp.93-106.  Epub June 20, 2020. ISSN 1405-2768.  https://doi.org/10.18387/polibotanica.49.6.

The chicozapote is an introduced species in the state of Nayarit, and given that, the dissemination of species outside of their originary region contributes to species diversification, this research was conducted with the purpose of knowing the morphologic variability of chicozapote trees of Nayarit, México and identifying outstanding materials for fruit production. Field trips around the State were carried out, and 55 trees were located and characterized. Morphologic and agronomic variables were registered. The data analysis used descriptive statistics, correlation analysis, principal components analysis and hierarchical cluster analysis. Morphological variability is present in chicozapote materials of Nayarit. In the analysis of principal components, the first three components explained 79.13% of the total morphological variability, and the variables that determined it were: equatorial and longitudinal fruit diameter, weight of fruit and pulp, width of leaf and weight of seed. The cluster analysis differentiated five groups, and inside of the groups, variability that allowed differentiating subgroups was present. The groups were not separated by municipality in the dendrogram. Morphological variability exists among the chicozapote materials of Nayarit. Some of the materials identified have potential to be used for fruit production, thick shell, long post-harvest life and seedless fruits that could be evaluated for organoleptic properties. The trees that produce parthenocarpic fruit could be used for studies about the reproductive biology of chicozapote.

Keywords : Manilkara zapota; fitogenetic resources; characterization.

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