Genetic diversity among accessions of sacha inchi (Plukenetia volubilis) by phenotypic characteristics analysis

Abstract

Sacha inchi (Plukenetia volubilis) is native to the Amazon region and has a high seed content of mono and polyunsaturated fatty acids, making it interesting for the pharmaceutical and cosmetic industry. The purpose of this study was to analyze sacha inchi genetic diversity and describe accessions based on phenotypic characteristics. Fruits and seeds of 25 accessions from the sacha inchi genebank of Embrapa Amazônia Ocidental in Manaus, Amazonas state, were sampled and biometrically measured. The data were subjected to analysis of variance, Mahalanobis distance, canonical correlation, and genetic diversity among and within accessions by analysis of molecular variance (AMOVA). There were significant differences among the means of the analyzed traits, but no significant canonical correlation for the groups of traits. According to AMOVA, approximately 60% of the observed variation was within accessions. The results showed variability among accessions, and that the variation within accessions should be explored to obtain best results in breeding programs.

Genetic divergence of native palms of Oenocarpus distichus considering biometric fruit variables

“…Ex Spreng. 12 and Plukenetia volubilis L. 29 . However, they should be excluded from the analyses, because they may lead to false biological interpretations and errors in the genotype selection process, due to the lack of precision in parameter estimation.…”

“…distichus individuals and consequently their heterosis in subsequent cycles, as reported for P . volubilis 29,32 . Similar groupings with the Tocher and UPGMA methods, the consistent genetic divergences between genotypes 2, 5 and 8 and the low number of groups may indicate a common ancestry for this plant in the region 12 , similar to that reported for Bactris gasipaes Kunth.…”