Diversity of phenotypic (plant and grain morphological) and genotypic (glutenin alleles in Glu-1 and Glu-3 loci) traits of wheat landraces (Triticum aestivum) from Andalusia (Southern Spain) uri icon

abstract

  • Forty-six landraces from Andalusia, region in southern Spain, were characterized for plant, spike and grain morphology and for HMWGs and LMWGs composition. Up to five botanical varieties were identified among these materials based in four morphological traits. According to grain colour, nine accessions showed heterogeneity. The remaining morphological traits showed wide variation. The analysis for HMWGs and LMWGs showed that the variation of these lines indicates that up to 77 genotypes could be found in these 46 accessions. The analysis for the HMWGS, detected a novel allele for Glu-A1 (subunit 1 ''') found in four lines (BGE012113 var. aureum; BGE013163 var. hostianum; BGE012196 and BGE026948 var. lutescens), and for Glu-D1 (subunits 3*+ T2) present in only one line derived from the BGE036374, var. aestivum. For the LMWGs a new allele for the Glu-B3 locus was detected. The allelic variation at the Glu-1 and Glu-3 showed a clear risk of genetic erosion due to the low frequency of some alleles. The characterization of these landraces could permit the evaluation of the relationship between the uses of these flours and the composition of their seed storage proteins. The recovery of old varieties or landraces is significant for farmers who can plant the materials and benefit from their potential value in the marketplace.

publication date

  • 2016
  • 2016