Abstract

JIMENEZ LOZANO, Liliana; ALMANZA PINZON, Martha Isabel  and  MUNOZ FLOREZ, Jaime Eduardo. Morphologic characterization of wild accesions of guava. Acta Agron. [online]. 2009, vol.58, n.2, pp.69-73. ISSN 0120-2812.

Quantitative and qualitative morphologic characterization of 22 wild accessions of guava Psidium guajava L. collected in Restrepo (Valle del Cauca), Armenia (Quindío) and Pereira (Risaralda) was done. Twelve (12) quantitative and ten (10) qualitative descriptors of stem, leaves and fruits were used. The Dice- Nei Li coefficient and the UPGMA was used for the cluster analysis. Dendrograms and principal components analysis were used. The highest variability was associated with fruit descriptors, pulp weight (CV = 55.92 %), fruit weight (CV = 45.23 %) and acidity (CV = 44.75 %). The joining analysis using quantitative characters allowed forming four groups: accessions from group A (Armenia) showed mean values of fruit quality descriptors (Brix grades, fruit sourness and relation between Brix grades/sourness) and high pulp content. The majority accessions of group C (Restrepo) had high quality fruit values, and low pulp content. Group B, formed by accessions from Armenia and Pereira, was differentiated by low yield descriptors values (weight fruit, pulp and seminal cavity diameter). Accessions from group D (Restrepo) showed mean values in quality and fruit yield. Quantitative descriptors were joined in three synthetic variables for yield and quality fruit that represented 76.86% of the total variation.

Keywords : Psidium guajava L.; genetic diversity; qualitative characters; quantitative characters.

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