Resumen

PELAEZ, Natalia et al. FENOLOGÍA Y EVALUACIÓN DE LAS ESTRUCTURAS REPRODUCTIVAS DE CULTIVARES DE FRÍJOL MUNGO EN DOS LOCALIDADES DEL ESTADO PORTUGUESA, VENEZUELA. Agronomía Trop. [online]. 2003, vol.53, n.1, pp.87-108. ISSN 0002-192X.

Summary In order to study phenology and evaluate reproductive structures of eight mungbean, Vigna radiata (L) Wilczek, cultivars, a trial was carried out during the rainy period known "North" (end of rainy season) between 1999 and 2000, in the farms The Coromoto and The Marías, whose agroecologic characteristics are typical of the alluvial plains of the occidentals high plains and of the areas of life of the tropical dry forest according to Holdridge. Cultivars evaluated were identified as Local, ML 267, VC 1973 C, VC 4443 A, VC 1178 B, VC 3541 B, Chun Nain 2 and Acriollado (from AVRDC, Taiwan). Experimental design was random block, with four replications. Weekly, ten successive plants on each plot were evaluated, identifying development stages and measuring plant height, average and time of appearance of flowers racemes, opened flowers and pods per plant. Variance analysis and Duncan test (P<0.05) were applied. Cultivars presented similar behaviour in relation to the appearance of stages of the forth and fifth node (V4-V5). The reproductive stage started 35 days after sowing (DAS). Earliest cultivars were ML 267 and Local. Plant height showed an exponential growth until 50 days of DAS and oscillated between 24.12 and 37.32 cm. Average of racemes/plant varied between 8.16 and 32.90. ML 267 and Acriollado presented the largest amount of flowers, decreasing with time. Pods/plant average varied between 21.15 and 105.85. Acriollado showed a superior behaviour, especially as to number of racemes/plants and pods/plant

Palabras clave : Mungbean; Vigna radiata; cultivars; phenology; reproductive structures.