Current U.S. breeding efforts for improving bacterial wilt resistance in flue-cured tobacco. [Conference paper]
1993
Sisson, V.A. (US Dept. of Agriculture, Oxford (USA). Crops Research Lab.) | Wernsman, E.A. (North Carolina State Univ., Raleigh (USA). Crop Science Dept.)
Pedigree selection over 50 years has greatly improved resistance, but the disease continues to cause significant economic loss. Current work seeks to increase the level of wilt resistance, improve the economic quality of highly resistant varieties, locate new sources of genes for resistance, and develop breeding and evaluation methods for resistant varieties. Attempts to revive the original sources of resistance have achieved only moderate success, and considerable back-crossing to improve flue-cured characteristics is needed. Haploid breeding methods are being used in attempt to combine resistance with line stability. A simple in vitro procedure for propagation of haploids has been developed.
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