Isolation of mildew resistant wheat-rye translocation lines from a double substitution line |
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Authors: | Arnulf Merker Per-Olov Forsström |
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Institution: | 1. Department of Plant Breeding Research, SLU, S-268 31, Sval?v, Sweden
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Abstract: | A powdery mildew resistant double disomic wheat-rye substitution line carrying rye chromosomes 1R and 2R was crossed with
normal bread wheats. The F2 generation was analysed cytologically by C-banding. Wheat-rye chromosome translocations involving both rye chromosomes 1R
and 2R were frequent in F2. Lines with translocations of 1R and 2R were harvested separately. After four generations of selfing and selection for mildew
resistance and fertility, fully fertile resistant lines were selected and analysed cytologically. Lines with 1BL/1RS and 2BS/2RL
translocations were identified. The resistance on chromosome 1RS could not be shown to be different from control varieties
carrying the same rye segment, while the resistance on 2RL is much broader than the earlier known 2RL derived resistance in
the line Transec.
This revised version was published online in July 2006 with corrections to the Cover Date. |
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Keywords: | alien genetic variation chromosome translocation powdery mildew resistance wheat |
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