DIVERSIDADE GENÉTICA EM BARUEIRO BASEADA EM VARIÁVEIS BIOMÉTRICAS E FISIOLÓGICAS EM UM TESTE DE PROGÊNIES E PROCEDÊNCIAS

Abstract

The barueiro belongs to the fabacea family, it is a typical species of the Cerrado and has great economic potential. In this sense, to support the technological processes of Barueiro, the conservation of germplasm 'ex situ' is necessary. That said, the objective of the present proposal is to estimate the genetic diversity among barueiro progenies for early stage characters in a test of progenies and provenances. The test in question was installed in an experimental area of ​​the IF Goiano – Campus Rio Verde in February 2018. The genetic material of the germplasm bank consists of progenies formed from seeds collected from mother trees from different origins in the state of Goiás, namely : Bom Jardim de Goiás, Iporá, Urutaí and Ipameri. The progenies were phenotyped using biometric and physiological characters in the winter and spring seasons, namely: plant height, stem diameter, Chlorophyll A and Chlorophyll B, with three evaluations being carried out in each season. The consistency of the UPGMA cluster was evaluated based on Mahalanobis distances as a measure of dissimilarity. Singh's method (1981) was also used to verify the proportion of variation observed for each variable. The formation of four and five genetically dissimilar groups was observed in the winter and spring seasons, respectively. The most divergent progenies in the Winter season were 2 and 30. In the Spring season the most divergent progenies were 3 and 9. The variables plant height and stem diameter were the ones that most contributed to the formation of groups by the UPGMA clustering method.