The genetic variability among six accesses of "carqueja" (Baccharis myriocephala), was evaluated by multivariate methods using isozymatic characters and morphological descriptors. The genetic divergence stability among the "carqueja" accesses was estimated in five harvesting times and the isozymatic characterization was carried out nine months after transplanting. In each harvesting time, the following morphological characteristics were evaluated: fresh matter mass, height and foliar area making use of two plants per access. As for the morphological characteristics, two groups were formed in time 1, four groups in time 2 and three groups in times 3, 4 and 5. For the isozymatic analysis, only the esterase system, among the tested systems, presented satisfactory resolution and two groups were formed. It was observed that the use of morphological descriptor at 145 days after transplanting showed more efficacy in discriminating by forming four groups of accesses. The isozyme potencial as a genetic marker in Baccharis myriocephala, was also verified, allowing its use in the characterization of varieties to complement morphological characteristics.
genetic resources; genetic divergence; Baccharis myriocephala; multivariate methods
