Caracterização morfoagronômica de genótipos de tabaco na região do Recôncavo da Bahia

Abstract

Tobacco is the main food not culture. Thus, the tobacco plantation he built an economy around itself, responsible for the generation of employment and income for millions of people, serving as a subsidy for the municipalities of Recôncavo baiano. This work had as objectives to investigate the genetic basis and characterize smoke genotypes used in programs for improvement of Recôncavo da Bahia from phenotypic characters, using a list of morfoagronômicos descriptors. Phenotypic characterization was performed on 13 genotypes, being assessed 45 descriptors. Among these, were considered polymorphic descriptors, being 19 quantitative and 11 qualitative for the formation of groupings. The descriptors have been examined individually and jointly, using the UPGMA clustering method for individual and descriptors for joint analysis was used also the procedure of Ward-MLM for comparison of estimated number of groups formed. The array was obtained from the algorithm of Gower. The correlation between the arrays was 0.88 **, showing the maximum value (CCC) in relation to that achieved by the UPGMA 0.85 **. The joint analysis of the data allowed estimation of the variance between the genotypes, and may direct the most divergent junctions. The phenotypic descriptors were effective in distinguishing the studied genotypes, allowing moderate evidence and similarity close genetic basis. Despite this, it was found for the phenotypic variability characteristic color of the leaf, genotype ER 35-109 presented dark green coloring, in manufacture to use preferred skins. Key-words: phenotypic characters; genetic diversity; Nicotiana tabacum L.