Disease resistance. Stripe rust

Yr15

References

1. A valuable source of yellow rust resistance in Israeli population of wild emmer Triticum dicoccoides  Koern. Gerechter-Amitai ZK, Stubbs RW.  In: Euphytica, 1970, 19:12-21.

2. Inheritance of resistance to stripe rust (Puccinia striiformmis) in crosses between wild emmer (Triticum dicoccoides) and cultivated tetraploid and hexaploid  wheat. I. Triticum durum. Gerechter-Amitai ZK, Grama A.  In: Euphytica, 1974. 23:387-392.

3. Yr15 : A new gene for resistance to Puccinia striiformis in Triticum dicoccoides sel. G-25. Gerechter-Amitai ZK, Van Silfhout CH, Grama A, Kleitman F. In:  Euphytica, 1989, 43(1-2): 187-190.

In a comparative study of reaction patterns and analysis of segregation ratios in cross progenies, Triticum dicoccoides Koern. sel. G-25 was shown to possess a yet unknown gene for resistance to yellow rust. In is suggested to assign provisionally the symbol Yr15 to this gene.

4. Cytogenetic studies in wheat XVII. Monosomic analysis and linkage relationships of gene Yr15 for resistance to stripe rust. McIntosh RA, Silk J, The TT. In:  Euphytica, 1996, 89(3): 395-399.

The highly effective stripe rust resistance gene, Yr15, derived from Triticum dicoccoides, was located in chromosome 1BS. Yr15 showed linkage of 0.30 (34 cM) with Yr10 and 0.07 with the centromere. Yr15 was preferentially transmitted relative to its alternate allele.

5. Inheritance of resistance to stripe rust (Puccinia striiformmis) in crosses between wild emmer (Triticum dicoccoides) and cultivated tetraploid and hexaploid wheat. I. Grama A, Gerechter-Amitai ZK,   In:  Euphytica, 1974. 23:393-398.

6. High-density molecular map of chromosome region harboring stripe-rust resistance genes YrH52 and Yr15 derived from wild emmer wheat, Triticum dicoccoides.. Peng JH, Fahima T, Roeder MS, Huang QY, Dahan A, Li YC, Grama A, Nevo E. In: Genetica, 2000, 109(3): 199-210.

Two stripe-rust resistance genes, YrH52 and Yr15, derived from the Israeli wild emmer wheat, Triticum dicoccoides, have been located on chromosome 1B. The main objectives of the present study were to increase marker density in the vicinity of YrH52 gene by means of AFLP, RAPD and microsatellite markers, to improve the map of another T. dicoccoides-derived stripe-rust resistance gene Yr15 using microsatellite markers, and to preliminarily discriminate these two genes. Additional 26 marker loci comprising 20 AFLPs, three RAPDs, and three microsatellites were found to be linked to YrH52 gene. An updated genetic map consisting of 45 marker loci, in the region of YrH52 gene, was constructed with a total map length of 107.7 cm. The mean interval length was 0.96 cm in the region Xgwm359b-P55M53b carrying YrH52 gene. YrH52 was bracketed by Xgwm413 (Nor1 and UBC212a) and Xgwm273a (Xgwm273d) with map distance of 1.3 and 2.7 cm from either side, respectively. Eight additional microsatellite markers were found to be linked with Yr15, and the linkage map of Yr15 gene was thus obviously improved. In the YrH52-mapping population, no crossover was detected in the interval UBC212a (Xgwm413)-Yr15-Nor1, and YrH52 was located distally outside this interval. It may suggest that YrH52 is different from Yr15 even though both of them are derived from T. dicoccoides and are mapped on chromosome 1BS. The large number of molecular makers revealed in the present study would be helpful for the marker-assisted introgression of the T. dicoccoides-derived YrH52 and Yr15 stripe-rust resistance genes into elite cultivars of wheat, and the high-density map would accelerate the map-based cloning of the two genes.