Evaluation of Leaf Rust Resistance in the Spanish Core Collection of Tetraploid Wheat Landraces and Association with Ecogeographical Variables

Fernando Martínez-Moreno, Patricia Giraldo, María del Mar Cátedra and Magdalena Ruiz
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Fernando Martínez-Moreno: Agronomy Department, Technical School of Agricultural Engineering, University of Seville, 41013 Seville, Spain
Patricia Giraldo: Biotechnology-Plant Biology Department, School of Agricultural, Food and Biosystems Engineering, Universidad Politécnica de Madrid, 28040 Madrid, Spain
María del Mar Cátedra: Department of Agriculture, Livestock, Fishing and Sustainable Development, Government of Andalusia, 41013 Seville, Spain
Magdalena Ruiz: National Plant Genetic Resources Centre (CRF), National Institute for Agricultural and Food Research and Technology, 28800 Alcalá de Henares, Spain

Agriculture, 2021, vol. 11, issue 4, 1-18

Abstract: Spain has a great landrace diversity of the subspecies of the tetraploid species Triticum turgidum L., namely, durum (or durum wheat), turgidum (or rivet wheat) and dicoccon (or domesticated emmer wheat). These wheats have to confront several foliar diseases such as the leaf rust. In this work, a core collection of 94 landraces of tetraploid wheats were inoculated with three leaf rust isolates. Besides, a larger collection (of 192 accessions) was evaluated in the field. Although the majority of landraces were susceptible, approximately 20% were resistant, especially domesticated emmer wheat landraces. Several variables, such as late heading and red coat seeds were associated to resistant accessions. Regarding ecogeographic variables, a higher rainfall from October to February and more uniform temperature were found in the area of origin of resistant landraces. Based on these results, several resistant landraces were identified that potentially may be used in durum wheat breeding programs. In addition, a predictive model was elaborated to develop smaller subsets for future screening with a higher hit rate for rust resistance.

Keywords: Puccinia triticina; Triticum turgidum; resistance; germplasm; ecogeographical variation (search for similar items in EconPapers)
JEL-codes: Q1 Q10 Q11 Q12 Q13 Q14 Q15 Q16 Q17 Q18 (search for similar items in EconPapers)
Date: 2021
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