| Summary: | In order to identify the variability of quantitative
and qualitative leaf and fruit descriptors, 41 commercial nance
selections (Byrsonima crassifolia (L.) HBK) collected in six locations
of the state of Nayarit were characterized. The main
component analysis (MCA) showed that 79.91 % of the total
variance (TV) was explained by seven main components
(MC’s) and from these three contributed 55.20 % to TV. MC1
explained 24.10 % of the variance, where the most relevant to
the study of the nance genetic diversity were: fresh leaf weight,
leaf area and the equatorial fruit diameter. MC2 contributed
19.18 % to TV, where the most important were fruit size and
fresh weight, as well as leaf average length and width. MC3
contributed 11.92 % to TV, where fruit shape and fruit apex form
were negatively correlated. Adaxial leaf pubescence correlated
positively. The rest of the total variance had little importance to
leaf and fruit phenotypic characterization. The three groupings
obtained by principal components and hierarchical conglomerates
had a high coincidence for discriminating selections based
on leaf and fruit descriptors. However, the descriptors obtained
showed no relationship with the geographical origin of the selections.
This supposes an advanced degree of domestication
and transit of plant material for commercial orchards.
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