Moroccan Journal of Agricultural and Veterinary Sciences

Vol. 10 No. 1 (2022): (March 2022)
Crop Production and Environment

Agro-morpho-phenological characterization of IRL-3, -4 and -5 lines of quinoa (Chenopodium quinoa Willd.)

PDF (French (Canada)) XML (French (Canada))
  • Asmaa ALLAOUI,
  • Ouafae BENLHABIB,
  • Eric N JELLEN
Asmaa ALLAOUI Institut Agronomique et Vétérinaire Hassan II, Rabat, Maroc
Ouafae BENLHABIB Institut Agronomique et Vétérinaire Hassan II, Rabat, Maroc
Eric N JELLEN College of Life Sciences, Brigham Young University, Provo, Utah, USA

Published 2022-03-16

Copyright Notice

Abstract

Multiple biotic and abiotic constraints affect world food production. According to the FAO announcement, quinoa represents a good ally to fight against hunger and malnutrition when considering its high nutritional value and its adaptation to harsh agro-ecological conditions. The objectives of this study are (i) to undertake a characterization of the IRL-3, -4 and -5 quinoa lines, (ii) to assess the potential for discrimination of the criteria used and (iii) to determine the extent of regenerated genetic variability. The study focused on 87, 156 and 156 IRL-3, IRL-4 and IRL-5 respectively and on 17 agro-morpho-phenological traits. The trials were carried out over 3 growing seasons, on an experimental plot at the Agronomic and Veterinary Institute Hassan II in Rabat. A large genetic variability was demonstrated through the qualitative and quantitative traits measured. The 11 quantitative traits showed very significant differences between the lines over the 3 generations, providing strong evidence of the significant diversity generated. The traits that showed the most variation were mildew susceptibility, root dry weight, grain yield and aerial part dry weight. The variance analysis (ANOVA) confirmed the highly significant differences in three generations studied. The Pearson Correlation Coefficient of IRL-3-4 and -5, showed significant correlations between height at maturity and length of inflorescences, between stem diameter and plant height and between grain yield and dry weight. dry matter. The first three-generation PCA components explained more than 50% of the total variability. The three-generation F1 * F2 factorial design revealed three distinct lineage groups. The study of heritability in the broad sense (H2) showed that the characteristics "cycle length, susceptibility to downy mildew, stem diameter, height of the plant at maturity and length of inflorescences" were the most hereditary, with a value of H2> 80%. The extensive diversity regenerated among the IRL-s studied indicates an important selection potential under Moroccan conditions.

Keywords: Chenopodium quinoa, IRLs, agro-morphological variability, genetic diversity

PDF (French (Canada)) XML (French (Canada))

References