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| Molecular mapping of stripe rust resistance gene in a synthetic derivative Chuanmai47 |
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Abstract Stripe rust, caused by Puccinia striiformis f. sp. tritici (PST), is one of the most devastating diseases in common wheat (Triticum aestivum L.) in China. Chuanmai 47, a new wheat variety derived from synthetics (Triticum durum×Aegilops tauschii), was highly resistant to Chinese newly predominant races of Chinese Yellow Race (CYR32) at adult stage. To map the resistant gene in Chuanmai 47, a total of 355 F2 progenies derived from the cross between resistant cultivar chuanmai47 and susceptible variety Taichang29 were used for the resistance gene identifying and genetic analysis. Results indicate that the stripe rust resistance of chuanmai47 conferred by a single dominant gene. And the resistance gene close to the centromere of chromosome 1B and closely linked to the marker Xgwm11, Xgwm498 and Xgwm273 with a genetic distance of 2.2cM, 3.9cM and 4.5cM. Chuanmai47 could be used as strip resistant germplasm in wheat breeding by molecular assistant selection(MAS).
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Received: 29 August 2006
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