Life story of Tunisian durum wheat landraces revealed by their genetic and phenotypic diversity
| Autor: | Pierre Sourdille, Sarrah Ben M’Barek, Sandrine Gélisse, Isabelle Nadaud, Thierry C. Marcel, Hajer Kouki, Frédéric Suffert, Amor Yahyaoui, Amine Slim, Safa Ben Krima |
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| Přispěvatelé: | BIOlogie et GEstion des Risques en agriculture (BIOGER), AgroParisTech-Université Paris-Saclay-Institut National de Recherche pour l’Agriculture, l’Alimentation et l’Environnement (INRAE), National Genebank of Tunisia (NGBT), Regional Field Crop Research Center of Beja (CRRGC), Génétique Diversité et Ecophysiologie des Céréales (GDEC), Université Clermont Auvergne [2017-2020] (UCA [2017-2020])-Institut National de Recherche pour l’Agriculture, l’Alimentation et l’Environnement (INRAE), International Maize and Wheat Improvement Center (CIMMYT), Consultative Group on International Agricultural Research [CGIAR] (CGIAR) |
| Rok vydání: | 2020 |
| Předmět: |
0106 biological sciences
2. Zero hunger 0303 health sciences Genetic diversity biology Resistance (ecology) food and beverages population genetics Population genetics Pst-Fst comparison biology.organism_classification septoria leaf blotch 01 natural sciences [SDV.GEN.GPL]Life Sciences [q-bio]/Genetics/Plants genetics genetic resources 03 medical and health sciences Septoria Agronomy phenotypic divergence Genetic structure Microsatellite Selection (genetic algorithm) 030304 developmental biology 010606 plant biology & botany Local adaptation |
| DOI: | 10.1101/2020.08.14.251157 |
| Popis: | Durum wheat (Triticum turgidumL. 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 diseaseSeptoria triticiblotch (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-Fstcomparison 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. |
| Databáze: | OpenAIRE |
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