Methodological proposal for the characterization of accessions in Germplasm Banks using Generalized Procrustes Analysis applied to incomplete but connected trials

ANDREA LINA LAVALLE; RAQUEL DEFACIO; MARIANO DE LEO; SERGIO BRAMARDI

REVISTA DE LA FACULTAD DE CIENCIAS AGRARIAS DE LA UNIVERSIDAD NACIONAL DE CUYO

UNIV NACIONAL CUYO

Lugar: Mendoza; Año: 2021 vol. 53 p. 35 - 45

0370-4661

Characterization of plant material conserved in germplasm banks allows the study andanalysis of the genetic variability within a collection. When germplasm banks have a largenumber of accessions, field evaluation should be performed using assays with manageableaccession subsets. Common checks connecting the different assays are required to comparethese accession subsets. In this study, the Generalized Procrustes Analysis was proposed asa basis for obtaining a factorial plane where all individuals are projected. This technique isapplied to genotypes common to all assays, iteratively generating scale factors and rotationmatrices. Accessions only belonging to a given assay are considered supplementary elements.This proposal was illustrated using datasets of 54 maize accessions from the PergaminoActive Germplasm Bank of the Experimental Station at the Instituto Nacional de TecnologíaAgropecuaria (INTA) in Argentina. The proposal achieved highly satisfactory results.