Morphological characterization of cassava varieties due to harvest times

Abstract

In order to characterize morphologically the varieties of cassava as a function of the harvest season, the experiment was conducted at the State University of Southwest of Bahia, campus of Vitória da Conquista-BA. The experimental design was a randomized block design with 3 replications, and the treatments arranged according to the subdivided plots scheme, with varieties (Sergipe, Caitité, Platinão, Roxinha and Pão de China) in the plots and six harvesting times in the subplots (270, 330, 390, 450, 510 and 570 days after planting). The characteristics of plant height, stem diameter, total leaf area and leaf area index were evaluated. In addition, the morphological characterization of the plants was carried out. The genotypes showed different behavior for the characteristic height of plants, the Roxinha variety was superior up to 450 days after planting, and at 510 and 570 days, the Caitité variety was superior. The bread genotypes of China, Platinão and Sergipe showed a larger stem diameter than the Caitité variety, with no differences between seasons. For the leaf area index and total leaf area characteristics, there was a reduction of the indexes in the sixth harvest, due to climatic factors in the period. The Sergipe variety had the highest leaf retention. In the morphological characterization of the genotypes, differences were observed between the materials and characteristics studied.