A phenetic analysis of morphological diversity in the genus Passiflora L.

Ocampo John, Coppens D'Eeckenbrugge Géo. 2009. A phenetic analysis of morphological diversity in the genus Passiflora L.. In : VII Simposio de Recursos Geneticos para America Latina y el Caribe, 29-30 Octubre 2009, Picon, Chile. Eds. Seguel Benítez, Ivette; León Lobos, Pedro; Muñoz Vera, Gastón; Piñeira Vargas, Jaime; Avendaño Fuentes, Lilian. Pucon : INIA, 206-207. (Fitogenéticos) ISBN 978-986-7016-37-2 Simposio de Recursos Geneticos para America Latina y el Caribe (SIRGEALC). 7, Pucon, Chili, 28 Octobre 2009/30 Octobre 2009.

Résumé : MorphologicaL variation was studied in 124 accessions from eight subgenera and 60 species among the most common cultivated and wild species of genus Passiflora with 127 descriptors. Twenty-four quantitative traits showing high variation among subgenera were selected. The three principal components of variation are associated with (i) flower length; (ii) flower width and bract shape; and (iii) peduncle branching, stem width and leaf length. The projection of accessions in the resultîng three-dimensional space consistently separates subgenera. A similar selection of 32 qualitative traits, and four categorized quantitative traits, allowed classifying our sample consistently. Our results support seven of the eight Killip's subgenera, but not Feuillet & MacDougal new infrasubgeneric classification. They converge however on many points with previous phylogenetîc results obtained with DNA sequences.

Classification Agris : F30 - Génétique et amélioration des plantes
F50 - Anatomie et morphologie des plantes
F70 - Taxonomie végétale et phytogéographie

Auteurs et affiliations

• Ocampo John, Universidad Nacional de Colombia (COL)
• Coppens D'Eeckenbrugge Géo, CIRAD-BIOS-UMR CEFE (FRA)

Source : Cirad - Agritrop (https://agritrop.cirad.fr/565105/)

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