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Title of Journal: Euphytica

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Abbravation: Euphytica

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Springer Netherlands

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DOI

10.1007/s00534-011-0378-5

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1573-5060

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STS markers for powdery mildew resistance gene Em

Authors: Jianhui Ji Bi Qin Haiyan Wang Aizhong Cao Suling Wang Peidu Chen Lifang Zhuang Yu Du Dajun Liu Xiue Wang
Publish Date: 2007/10/05
Volume: 163, Issue: 2, Pages: 159-165
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Abstract

The powdery mildew resistance gene Pm6 transferred to common wheat from the tetraploid Triticum timopheevii is effective in most epidemic areas for powdery mildew in China RFLP probe BCD135 was previously associated with Pm6 In the present research four STS primers NAU/STSBCD1351 NAU/STSBCD1352 STS003 and STS004 were designed from the sequence data of BCD135 These primers were used for PCR amplification using the genomic DNA of resistant nearisogenic lines with Pm6 and their recurrent parent cv Prins No polymorphic product was observed using primers STS003 and STS004 however primers NAU/STSBCD1351 and NAU/STSBCD1352 amplified two and one bands respectively polymorphic between the resistant nearisogeniclines and Prins The two primers were then used to amplify the F2 population from the cross IGV1465 FAO163b/7Prins × Prins The amplification and the powdery mildew resistance identification data were analyzed using the software Mapmaker 30 The results indicated that both NAU/STSBCD1351 and NAU/STSBCD1352 were closely linked to Pm6 with a genetic distance of 08 cM A total of 175 commercial varieties without Pm6 from different ecological areas of China were tested using marker NAU/STSBCD1352 and none of them amplified the 230 bpspecific band This marker thus has high practicability and can be used in MAS of Pm6 in wheat breeding programs for powdery mildew resistanceThe project was supported by the Specialized Research Fund for the Doctoral Program of Higher Education SRFDP 20020307011 the Chinese High Tech Program of China 2006AA10Z1F6 2006AA100101 and the Program for Changjiang Scholars and Innovative Research Teams in Universities No 10418 We would like to thank Dr R McIntosh and Dr Yiqun Weng for their critical reading of the manuscript We are also grateful to Prof Yilin Zhou and Prof Xiayu Duan Plant Protection Institute Chinese Academy of Agricultural Sciences for kindly supplying the Blumeria graminis isolates

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