Summary
Segregation analysis in BC1 and F2 progenies from interspecific hybrids between Allium roylei and A. cepa demonstrated that leaf blight resistance is conditioned by one single dominant gene from A. roylei. This gene, designated Bs 1 , was unlinked to the genes Pd 1 and Pd 2 determining downy mildew resistance. The prospects of exploiting A. roylei as a source for disease resistances in onion breeding are very promising.
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de Vries, J.N., Wietsma, W.A. & de Vries, T. Introgression of leaf blight resistance from Allium roylei Stearn into onion (A. cepa L.). Euphytica 62, 127–133 (1992). https://doi.org/10.1007/BF00037938
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DOI: https://doi.org/10.1007/BF00037938