Abstract

MACHADO, R  and  OLIVERA, Yuseika. Morphological characterization of a collection of Teramnus spp.. Pastos y Forrajes [online]. 2008, vol.31, n.2, pp. 1-1. ISSN 0864-0394.

The objective of this work was to characterize a collection of Teramnus spp. formed by 50 accessions from the CIAT, Colombia. For that international descriptors for forage legumes and other descriptors of interest (32 in total, quantitative and qualitative) were taken into consideration. The seed of each accession, was planted in 12 niches in simple 3 x 1 m plots and a stake was placed to allow them their highest growth and development. The measurements and observations were carried out when the plants reached the phenohase of green to ripe seed. The application of the Main Component Analysis allowed to prove the existence of a relatively high variability for all the characters, because the total only reached 67,7% in the first eight components; the quantitative descriptors stood out, with 51,8% in the first five components. The grouping of the accessions based on the foliar dimensions and number of seeds, through a Cluster Analysis, allowed the formation of five contrasting groups; two accessions of T. labialis (CIAT-927 and CIAT-9007) were distinguished, in which these characters were maximized with regards to the others of these species; while 62,0% of this collection was represented by phenotypes with short leaves, short and narrow folioles, short petioles and a number of seeds per pod that did not exceed a mean higher than 8. It is concluded that the characterization allowed to prove the relative variability of its components, although it is widened with regards to the existing germplasm in the country for species of this genus and, on the other hand, it increases the germplasm considerably. The evaluation of the agroproductive potentials of interest, with selective objectives, is recommended.

Keywords : Plant collection; Teramnus spp.

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