BIOLOGICAL RESOURCES DIVISION: Genetic variation of accessions within Fusarium head blight resistant wheat cultivars revealed by SSR markers

摘要

Fusarium head blight (FHB) is one of the most destructive diseases that afflicts wheat. Repeated screening of genetic resources has led to the identification of several resistant cultivars of spring wheat, such as Frontana from Brazil, Sumai 3 from China and Nobeokabouzu-komugi from Japan. It is known, however, that several morphological and ecological variations with different responses to FHB exist within global accessions of Frontana and Sumai 3, and differing sources of Sumai 3 have been identified by DNA markers. In this study, we revealed genetic variation within accessions of Frontana (Brazil, the United States, Canada and Japan) and Sumai 3 (China, the United States, Canada, Iran, Austria and Japan) that had been sent to the International Maize and Wheat Improvement Center (CIMMYT) by using 242 SSR markers (Fig. 1) which encompass the entire wheat genome. Frontana-USA and -CAN were found to be identical with, or to be variants of, the original Brazilian accession.