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| ACCESSION | PLANT NAME | TAXONOMY | ORIGIN | GENEBANK | IMAGE | AVAILABILITY | RECEIVED | SOURCE TYPE | SOURCE DATE | COLLECTION SITE | COORDINATES | ELEVATION | HABITAT | IMPROVEMENT LEVEL | NARRATIVE | | |
|---|
| 0 | PI 603918 | UCRBW98-1 | Triticum aestivum L. subsp. aestivum | California, United States | NSGC |  | | 1998 | DEVELOPED | 1998 | | | | | Breeding material | Two segments from chromosome 7S#1 of Triticum speltoides were transferred to chromosome 7A of hexaploid wheat (T. aestivum). Chromosome 7S#1 was originally found in bread wheat following irradiation of seed of a hybrid CI15092/T. speltoides//Fletcher/3/5*Centruk with fast neutrons. Chromosome 7S#1 was recombined with chromosome 7A in hard white spring cultivar Pavon using the ph1b mutation and Sears' strategy. Three additional backcrosses to Pavone were made and homozygotes selected. This short arm translocation line carries resistance gene Lr47 for leaf rust (Puccinia recondita). This gene confers resistance to nine leaf rust races that are virulent on resistance genes Lr1 and Lr10 present in the recurrent variety Pavon. This 7S#1 segment is located 2 to 10 cM from the centromere and is 20 to 30 cM long. | 1559067 | PI 603918 |