Disease Resistance Evaluation of Elite CIMMYT Wheat Lines Containing the Coupled Fhb1 and Sr2 Genes
| العنوان: | Disease Resistance Evaluation of Elite CIMMYT Wheat Lines Containing the Coupled Fhb1 and Sr2 Genes |
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| المؤلفون: | Susanne Dreisigacker, Pawan K. Singh, Xinyao He, Wolfgang Spielmeyer, Ravi P. Singh, Jessica Hyles, G. S. Brar, David Bonnett, Sridhar Bhavani |
| المصدر: | Plant Disease. 104:2369-2376 |
| بيانات النشر: | Scientific Societies, 2020. |
| سنة النشر: | 2020 |
| مصطلحات موضوعية: | 0106 biological sciences, 0301 basic medicine, Germplasm, Fusarium, Breeding program, biology, food and beverages, Plant Science, Plant disease resistance, biology.organism_classification, Stem rust, 01 natural sciences, 03 medical and health sciences, 030104 developmental biology, Inbred strain, Agronomy, Cultivar, Agronomy and Crop Science, Gene, 010606 plant biology & botany |
| الوصف: | Fusarium head blight (FHB) and stem rust are among the most devastating diseases of wheat worldwide. Fhb1 is the most widely utilized and the only isolated gene for FHB resistance, while Sr2 is a durable stem rust resistance gene used in rust-prone areas. The two loci are closely linked on the short arm of chromosome 3B and the two genes are in repulsion phase among cultivars. With climate change and the shift in Fusarium populations, it is imperative to develop wheat cultivars resistant to both diseases. The present study was dedicated to developing wheat germplasm combining Fhb1 and Sr2 resistance alleles in the International Maize and Wheat Improvement Center (CIMMYT)’s elite cultivars’ backgrounds. Four recombinant inbred lines (RILs) in Hartog background that have the resistant Fhb1 and Sr2 alleles in coupled phase linkage were crossed with seven CIMMYT bread wheat lines, resulting in 208 lines. Molecular markers for both genes were employed in addition to the use of pseudo-black chaff (PBC) as a phenotypic marker for the selection of Sr2. At various stages of the selection process, progeny lines were assessed for FHB index, Fusarium damaged kernels (FDK), stem rust, and PBC expression as well as other diseases of interest (stripe rust and leaf spotting diseases). The 25 best lines were selected for CIMMYT’s wheat breeding program. In addition to expressing resistance to FHB, most of these 25 lines have an acceptable level of resistance to other tested diseases. These lines will be useful for wheat breeding programs worldwide and potentially speed up the resistance breeding efforts against FHB and stem rust. |
| تدمد: | 1943-7692 0191-2917 |
| URL الوصول: | https://explore.openaire.eu/search/publication?articleId=doi_________::bb0fad21c5c664f47e7ade653c55a3f2 https://doi.org/10.1094/pdis-02-20-0369-re |
| حقوق: | OPEN |
| رقم الأكسشن: | edsair.doi...........bb0fad21c5c664f47e7ade653c55a3f2 |
| قاعدة البيانات: | OpenAIRE |
| تدمد: | 19437692 01912917 |
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