GENETIC DIVERSITY IN AMBURANA (Amburana cearensis) ACCESSIONS: HIERARCHICAL AND OPTIMIZATION METHODS

Abstract

The evaluation of accessions in a germplasm bank is essential for determining the potential parents in conservation programs, especially for native trees. This study aimed to determine the genetic diversity among 68 Amburana cearensis genotypes from different locations in the state of Pernambuco, Brazil. Their genetic patterns were evaluated by Inter Simple Sequence Repeat (ISSR) molecular markers and genetic divergence was evaluated through multivariate analyses using different clustering methods. The optimization method used (Tocher) was in agreement with all the hierarchical models used, in which clustering of the genotypes occurred similarly, specifically for the accession BB116, which is an important genetic material to be preserved and studied. Among the various hierarchical methods applied, the Average Linkage method exhibited higher discrimination power, allowing identification of a larger number of divergent groups, thus implying wide genetic diversity among A. cearensis accessions.

Phenotypic and genotypic evaluation of Parkia platycephala families: a proposal for pre-selection

“…The implementation of provenance and/or progeny tests is a common practice for native forest species with high economic and ecological value. The goals of implementing such tests include genetic conservation, the formation of seed orchards, pre-breeding, domestication, and the development of genetic improvement programs (Souza et al 2021). Besides enabling the phenotypic and genotypic characterization of the population of interest, provenance and progeny tests also provide information about genitors based on an evaluation of their descendants (Lustri et al 2021).…”

“…The characterization of the genetic variability of base populations of forest species in the form of progeny tests has been well documented in research carried out under field conditions (Garuzzo et al 2021, Lustri et al 2021, Souza et al 2021. As a way of anticipating this characterization, morphophysiological assessments at the seedling (Kampa et al 2020) and plantlet stages (Menegatti et al 2016, Corrêa et al 2021) have also been conducted.…”