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Cytogenetic identification and molecular marker development for the novel stripe rust-resistant wheat- Thinopyrum intermedium translocation line WTT11

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aBIOTECH 2021年第4期2卷 343-356页

作者： Guotang Yang Qi Zheng Pan Hu Hongwei Li Qiaoling Luo Bin Li Zhensheng Li State Key Laboratory of Plant Cell and Chromosome Enginering Institute of Genetics and Developmental Biology The Innovative Academy of Seed DesignChinese Academy of SciencesBeijing 100101China University of Chinese Academy of Sciences Beijing 100049China

Stripe rust,caused by Puccinia striformis ***(Pst),is one of the most destructive diseases of wheat(Triticum aestivum L)*** 78829,a partial amphidiploid developed by crossing common wheat with Thinopyrum intermedium,is immune to wheat stripe *** transfer the resis-tance gene of this excellent germplasm resource to wheat,the tr anslocation line WTT11 was produced by pollen irradiation and assessed for immunity to stripe rust races cyr32,cyr33 and cyr34.A novel stripe rust-resistance locus derived from *** was confirmed by linkage and diagnostic marker *** cytogenetic analyses revealed that WTT11 carries a TTh 2DL *** breakpoint of 1B was located at 95.5 MB,and the alien segments were found to be homoeologous to wheat-group chromosomes 6 and 7 according to a wheat660K single-nucleotide polymorphism(SNP)array *** previously developed PCR-based markers were confirmed to rapidly trace the alien segments of WTT11,and 20 kompetitive allele-specific PCR(KASP)markers were developed to enable genotyping of *** and common *** of agronomic traits in two consecutive crop seasons uncovered some favorable agronomic traits in WTT11,such as lower plant height and longer main panicles,that may be applicable to wheat *** a novel genetic resource,the new resistance locus may be useful for wheat disease-resistance breeding.

关键词： Wheat-Thinopyrum intermedium translocation line cyr34 Cytogenetic analyses Wheat660k SNP array PCR-based markers KASP markers

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