Abstract

VELASQUEZ, Ennodio. Efecto de la variabilidad en genotipos de Yuca sobre factores vinculados a la brotación y crecimiento de Esquejes. Bioagro [online]. 2006, vol.18, n.1, pp.041-048. ISSN 1316-3361.

In order to study the influence of cassava genotypes variability on sprouting and growth of stems cuttings, an experiment was conducted with eight clones identified as MVen-07, MVen-889, MBol-12, SG-107- 35, Bonifacia-N, Bonifacia-R, Canaria-D and UCV-2105. Previously, the clones were cultivated under similar managment system and harvested at 11 months old, selecting stems with diameters from 2.5 to 3.5 cm, for controlling no genetic sources of variation. A randomized completely block design with four replications was applied, and water content, sprouting, and aerial and root dry matter on the stems cuttings were evaluated. Characteristics more frequently found were plant size from 1,51 to 2,50 m, stems with right growth, erect habit, ramifications with four and more levels, roots with corrugated texture, cylinder- conic shape, cream- yellow felodermis, and white flesh, oblanceolate leafs, with seven lobules, yellow-green petioles, yellow- green stems and toxic roots. Significant differences were found between clones (P≤0.01) except for sprouting, factor that was not affected by genotype variations. The differences related to aerial and radical growth of stems cuttings was attributed to genetic reasons in characteristics, such us plant size, ramification levels, shape of leaf lobules, ramification height and decumbence. The best balance related to the studied variables was found on genotypes MVen-07, Bonifacia-R and SG-107-35.

Keywords : Manihot esculenta; propagation; growth habits.