Abstract

QUESADA-MENDEZ, Isaac; QUINTERO-BARRERA, Lorena; ARISTIZABAL, Fabio A.  and  RODRIGUEZ-ACUNA, Olga. Assessment of the genetic diversity of natural rubber tree clones of the SINCHI Institute's clone collection, using of morphological descriptors. Colomb. for. [online]. 2011, vol.14, n.1, pp.69-79. ISSN 0120-0739.

Genetic diversity of natural rubber clones of the in SINCHI Institute’s clone collection was assessed. Clones of Hevea brasiliensis (Willd. ex Adr. De Juss.) Muell.Arg., Hevea spp. (H. brasiliensis x H. benthamiana), and three more species of Hevea genus are a part of the collection. Seventy-two materials were characterized with twenty-eight morphological descriptors. They were later used to generate a similarity matrix through the analysis of multi-categorical variables, and to obtain clusters based on the matrix. A low variability between clones of H. brasiliensis and H. spp. was observed, presumably because of the direct descendants of most of the materials from crosses of parental PB 80, PB 5/51, PB 49 and Tjir, exception made of clone GU 1410. Clustering between some materials product of exclusive cross of PB series, a group between clones descendants of parental clones PB 86, and clustering between descendants of parental clones PB 5/51, were observed. Clones from other species of Hevea differ from this big group.

Keywords : rubber; Hevea; morphology; genetic variability.

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