Identification and mapping of a novel blast resistance gene Pi57(t) in Oryza longistaminata : E-17

Xu Peng, Dong Liying, Zhou Jiawu, Li Jing, Zhang Y., Hu F.Y., Liu S.F., Wang Qun, Deng Wei, Deng X.N., Tharreau Didier, Yang Qinzhong, Tao D.Y.. 2013. Identification and mapping of a novel blast resistance gene Pi57(t) in Oryza longistaminata : E-17. In : Translation for genomics to disease managment : 6th International Rice Blast Conference (IRBC), Jeju, South Korea, August 20-24, 2013. s.l. : s.n., Résumé, 161. International Rice Blast Conference. 6, Jejudo, Corée du Sud, 20 Août 2013/24 Août 2013.

Résumé : Oryza longistaminata with strong resistance to biotic and abiotic stress was regarded as an excellent gene pool of wild rice, mining and utilization of favorable genes of O. longistaminata would be important in breeding of O. sativa by broadening its genetic basis. To explore blast resistant genes from O. longistaminata, RD23, an indica cultivar from Thailand, was crossed with an accession of O. longistaminata through embryo rescue, and a set of BC3F7 introgression lines (ILs) had been constructed. The ILs were tested for blast resistance in natural blast nursery, and three desirable ILs that exhibited a high level of resistance to rice blast was obtained. Using a BC4F2 population from a cross of IL-E1454/RD23, a novel dominant blast resistant gene, designated as Pi57(t), was mapped on chromosome 12 of rice flanked by SSR markers RM27892 and RM28093. It was found that Pi57(t) conferred a broad-spectrum resistance to Magnaporthe oryzae isolates collected from Yunnan, and the resistant spectrum distinguished from 5 known blast R genes located on chromosome 12. Our results suggest that the Pi57(t) would be a promising gene for breeding blast-resistant rice in Yunnan, China. (Texte intégral)

Classification Agris : F30 - Génétique et amélioration des plantes
H20 - Maladies des plantes

Auteurs et affiliations

• Xu Peng, Yunnan Academy of Agricultural Sciences (CHN)
• Dong Liying, Yunnan Academy of Agricultural Sciences (CHN)
• Zhou Jiawu, Yunnan Academy of Agricultural Sciences (CHN)
• Li Jing, Yunnan Academy of Agricultural Sciences (CHN)
• Zhang Y., Yunnan Academy of Agricultural Sciences (CHN)
• Hu F.Y., Yunnan Academy of Agricultural Sciences (CHN)
• Liu S.F., Yunnan Academy of Agricultural Sciences (CHN)
• Wang Qun, Yunnan Academy of Agricultural Sciences (CHN)
• Deng Wei, Yunnan Academy of Agricultural Sciences (CHN)
• Deng X.N., Yunnan Academy of Agricultural Sciences (CHN)
• Tharreau Didier, CIRAD-BIOS-UMR BGPI (FRA) ORCID: 0000-0003-3961-6120
• Yang Qinzhong, Yunnan Academy of Agricultural Sciences (CHN)
• Tao D.Y., Yunnan Academy of Agricultural Sciences (CHN)

Source : Cirad - Agritrop (https://agritrop.cirad.fr/571735/)

Métriques

[ Page générée et mise en cache le 2024-04-24 ]