Potato Virus Y Resistance Gene, Ry chc, Mapped to the Distal End of Potato Chromosome 9 |
| |
| Authors: | Masatoshi Sato Kazuko Nishikawa Kuninori Komura Kazuyoshi Hosaka |
| |
| Affiliation: | (1) National Center for Seeds and Seedlings, 2-2 Fujimoto, Tsukuba Ibaraki, 305-0852, Japan;(2) Food Resources Education and Research Center, Kobe University, 1348 Uzurano, Kasai Hyogo, 675-2103, Japan;(3) Aino Potato Branch, Nagasaki Pref. Agricultural and Forestry Experiment Station, 2777 Otsu, Aino, Nagasaki 854-0302, Japan |
| |
| Abstract: | Summary A Japanese leading cultivar ‘Konafubuki’ has an extreme resistance gene Ry chc to Potato virus Y (PVY) in a simplex fashion. To reduce complexity of the highly heterozygous autotetraploid genome and map the Ry chc gene, haploid plants were parthenogenetically induced from ‘Konafubuki’. The ratio of 7 resistant: 5 susceptible haploids confirmed the single dominant, simplex genotype of ‘Konafubuki’. A selected resistant haploid 98H20-5 was crossed with a susceptible diploid, resulting in 119 F 1 plants. Using RFLP and RAPD markers, Ry chc was mapped to the most distal end of the chromosome 9 where the recovery of recombinant genotypes was extremely reduced in this mapping population possibly due to the linked inferiority factor. The location of Ry chc is different from those of the other extreme resistance genes to PVY, but possibly resides in one of resistance gene clusters. |
| |
| Keywords: | extreme resistance gene mapping potato chromosome 9 Potato virus Y |
| 本文献已被 SpringerLink 等数据库收录！ |
|
