Abstract
To clarify the geographic variation and isolate specificity in blast resistance, 20 cultivars of foxtail millet (Setaria italica (L.) P. Beauv.) originating from Eurasia were examined for their resistance using 11 Japanese Setaria isolates of blast fungus. Cultivars from the countries east of Pakistan generally showed resistance to most of the 11 fungus isolates, whereas those from the countries west of Afghanistan indicated higher susceptibility. The origin of this geographical regularity was discussed in relation to the deficiency or specificity of relevant resistance gene(s). No identical reaction pattern was observed among cultivars, indicating their highly distinctive isolate specificity. The virulence of isolates was also diverse, since only 2 out of 10 virulent isolates were identical for their reaction patterns. Preliminary genetic analysis of blast resistance to four fungus isolates suggests that they are governed by more than two dominant genes.
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Nakayama, H., Nagamine, T. & Hayashi, N. Genetic Variation of Blast Resistance in Foxtail Millet (Setaria italica (L.) P. Beauv.) and its Geographic Distribution. Genet Resour Crop Evol 52, 863–868 (2005). https://doi.org/10.1007/s10722-003-6121-6
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DOI: https://doi.org/10.1007/s10722-003-6121-6