Seleção de matrizes de Apeiba tibourbou Aubl em população ex situ

Abstract

The fragmentation of ecosystems needs to be reversed as soon as possible and, to this end, one strategy has been to understand the genetic variability of populations of plant species with current and potential value so that their conservation is possible. Furthermore, conscious exploration of plant material can be made possible. The Pau-Jangada (Apeiba tibourbou Aubl.) is an example of an important species, its wood is used in the manufacture of boats and buoys, its adaptation to degraded environments makes it suitable for the recovery of degraded areas and its bark and leaves are used in folk medicine. That said, the work was carried out with the aim of phenotypically characterizing this forest species and contributing to the selection of the most promising individuals, with a view to their ex situ conservation, management, use for seed production and future genetic improvement programs. The following phenotypic characters were collected: plant height (ALT, m); diameter at breast height (DBH, cm); average crown diameter (DMC, m) and stem shape (FOR). Descriptive statistical analyzes were performed using the Selegen Reml-Blup software, and multivariate analysis and principal components using the RBio software. From the results obtained, it was possible to observe that the species is evaluated as having good potential for genetic improvement and conservation programs, due to having medium and high coefficients of variation on the characters Diameter at breast height (28.22%), Height ( 15.55%), Height of the 1st branch (37.04%), Average crown diameter (29.70%) and Shape of the Bole (21.65%), with individuals 4, 14, 15, 21 and 22 being the most promising for collecting seeds aimed at recovering areas and genetic improvement of the species, as they present greater genetic distances.

Keywords: Genetic Parameters, Pau-Jangada, UPGMA