Molecular Cytogenetic Characterization and Stem Rust Resistance of Five Wheat-Thinopyrum ponticum Partial Amphiploids

查看全文 作　　者：Qi [1]Zheng;Zhenling [1]Lv;Zhixia [2]Niu;Bin [1]Li;Hongwei [1]Li;Steven [2]S.Xu;Fangpu [1]Han;Zhensheng [1]Li

机构地区：[1]State Key Laboratory of Plant Cell and Chromosome Engineering,Institute of Genetics and Developmental Biology,Chinese Academy of Sciences;[2]United States Department of Agriculture,Agricultural Research Service,Cereal Crops Research Unit

出　　处：《Journal of Genetics and Genomics》索引2014年第41卷第11期,共9页

基　　金：supported by the grants from the National Natural Science Foundation of China(No.31171539);the National High-Tech Research and Development Program of China(No.2011AA1001);the National Key Technology R&D Program of China(No.2013BAD05B01) 摘　　要：Partial amphiploids created by crossing common wheat(Triticum aestivum L.) and Thinopyrum ponticum(Podp.) Barkworth & D.R.Dewey are important intermediates in wheat breeding because of their resistance to major wheat diseases.In this study,we examined the chromosome compositions of five Xiaoyan-series wheat-Th.ponticum partial amphiploids(Xiaoyan 68.Xiaoyan 693,Xiaoyan 784,Xiaoyan 7430,and Xiaoyan 7631) using GISH,multicolor-GISH.and multicolor-FISH.We found several chromosome changes in these lines.For example,wheat chromosomes 1B and 2B were added in Xiaoyan 68 and Xiaoyan 7430,respectively,while wheat chromosome6 B was eliminated from Xiaoyan 693 and Xiaoyan 7631.Chromosome rearrangements were also detected in these amphiploids.including an interspecific translocation involving chromosome 4D and some inlergenomic translocations,such as A-B and A-D translocations,among wheat genomes.Analysis of the Th.ponticum chromosomes in the amphiploids showed that some lines shared the same alien chromosomes.We also evaluated these partial amphiploids for resistance to nine races of stem rust,including TTKSK(commonly known as Ug99).Three lines,Xiaoyan 68,Xiaoyan 784,and Xiaoyan 7430,exhibited excellent resistance to ail nine races,and could therefore be valuable sources of stem rust resistance in wheat breeding. 关键词：普通小麦双二倍体分子细胞遗传学茎锈病偃麦草染色体组成小麦育种原位杂交

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Molecular Cytogenetic Characterization and Stem Rust Resistance of Five Wheat-Thinopyrum ponticum Partial Amphiploids

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