Life story of Tunisian durum wheat landraces revealed by their genetic and phenotypic diversity - INRAE - Institut national de recherche pour l’agriculture, l’alimentation et l’environnement Access content directly
Preprints, Working Papers, ... (Preprint) Year : 2020

Life story of Tunisian durum wheat landraces revealed by their genetic and phenotypic diversity

Abstract

Durum wheat (Triticum turgidum L. subsp. durum) landraces represent a prominent genetic resource for Mediterranean farming systems and breeding programs. Fourteen landraces sampled in Tunisia were genotyped with 9 microsatellite markers and characterized with 15 morphological descriptors, including resistance to the fungal disease Septoria tritici blotch (STB). The genetic diversity, nearly was as important within landraces populations (45%) than between populations (54%). It was structured in seven genetic groups and was only partly explained by the variety name or the locality of origin. Populations were also greatly diversified phenotypically (Shannon-Weaver H'=0.54) with traits related to spike and awn colours being the most diversified. Resistance to STB was either qualitative in two populations or with varying degrees of quantitative resistance in the others. A Pst-Fst comparison indicate a local adaptation of the populations. Overall, the genetic structure of Tunisian durum wheat landraces revealed a complex selection trajectory and seed exchanges between farmers.
Fichier principal
Vignette du fichier
Ben Krima et al 2020.pdf (1.29 Mo) Télécharger le fichier
Origin : Files produced by the author(s)

Dates and versions

hal-03303679 , version 1 (28-07-2021)

Licence

Copyright

Identifiers

Cite

Safa Ben Krima, Amine Slim, Sandrine Gélisse, Hajer Kouki, Isabelle Nadaud, et al.. Life story of Tunisian durum wheat landraces revealed by their genetic and phenotypic diversity. 2021. ⟨hal-03303679⟩
110 View
277 Download

Altmetric

Share

Gmail Facebook X LinkedIn More