ABSTRACT
This study evaluated balsa wood (Ochroma pyramidale) plantations in the search for matrices for genetic improvement. We were evaluated a total of 20 trees in plantations in Mato Grosso for genetic diversity with ISSR (Inter Simple Sequence Repeats) primers, as well as their diameter at breast height (DBH) and commercial height (CH). The primers amplified 111 loci (97.3% polymorphic), and the Nei genetic diversity (0.32) and Shannon index (0.48) indicate that there is genetic diversity in the plantations. The AMOVA revealed greater genetic variation within the plantations rather than among the plantations. The UPGMA group indicated the formation of nine groups, four of which had one individual each. As for phenotypic characterization, individuals 48 and 52 stand out for having higher DBH, and individuals 30 and 34 presented higher CH. Considering DBH and CH concomitantly, 12 individuals are within the standards. In the evaluated plantations, there is sufficient variability for the identification of balsa wood matrices.
Keywords
Balsa wood; Genetic variability; Molecular markers; Genetic improvement
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Source: Authors (2021). In where: UPGMA is Unweighted Pair-Group Method Average; The cutoff point of 80.6% (0.5203) was established using the 
Source: Authors (2021). In where: *The vertical lines on the X axis represent the individuals and the colored segments on the Y axis demonstrate the association coefficient of each individual assigned to each of the inferred K.