Abstract
The presence of a major resistance gene (Bru1) for brown rust in the sugarcane cultivar R570 (2n about 115) was confirmed by analyzing segregation of rust resistance in a large population of 658 individuals, derived from selfing of clone R570. A subset of this population was analyzed with AFLP and bulked segregant analysis (BSA) to develop a detailed genetic map around the resistance gene. Four hundred and forty three primer pairs were used resulting in the identification of eight AFLP markers surrounding the resistance gene in an interval of 10 cM, with the closest markers located at 1.9 and 2.2 cM on each side of the gene. Efficiency of the AFLP/BSA applied to the complex polyploid genome of sugarcane is discussed, as well as the potential of the newly identified AFLP markers for developing a map-based cloning approach exploiting, synteny conservation with sorghum.
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We thank the International Consortium for Sugarcane Biotechnology for the financial support of this work, and J.C. Glaszmann for critical reading of the manuscript.
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Communicated by H. F. Linskens
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Asnaghi, C., Roques, D., Ruffel, S. et al. Targeted mapping of a sugarcane rust resistance gene (Bru1) using bulked segregant analysis and AFLP markers. Theor Appl Genet 108, 759–764 (2004). https://doi.org/10.1007/s00122-003-1487-6
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DOI: https://doi.org/10.1007/s00122-003-1487-6