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Development of Triticum aestivum-Leymus racemosus translocation lines using gametocidal chromosomes

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Abstract

Specific chromosomes of certain Aegilops species introduced into wheat genome background may often facilitate chromosome breakage and refusion, and finally result in a variety of chromosome restructuring. Such a phenomenon is commonly called gametocidal effect of the chromosomes. The chromosome 2C of Ae. cylindrica is one of such chromosomes. In the present study, scab resistant wheat-L. racemosus addition lines involving chromosomes Lr.2 and Lr.7 were crossed to wheat-Ae. cylindrica disomic addition line Add2C. Then F1 hybrids were subsequently backcrossed with wheat cv “Chinese Spring”. BC1 plants with chromosome structural aberration were identified by C-banding. In the self-pollinated progenies of these plants, three translocation lines were developed and characterized by mitotic and meiotic analysis combined with C-banding and fluorescent in situ hybridization (FISH) using biotin-labeled genomic DNA of L. racemosus as probe. Some other putative translocation lines to be further characterized were also found. The practicability and efficiency of the translocation between wheat and alien chromosomes induced by gametocidal chromosomes, as well as the potential use of the developed alien translocation lines were also discussed.

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Authors and Affiliations

  1. Key Laboratory of Crop Cytogenetics, Ministry of Agriculture, Nanjing Agricultural University, 210095, Nanjing, China

    Yuan Jianhua, Chen Peidu & Liu Dajun

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  1. Yuan Jianhua
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  2. Chen Peidu
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  3. Liu Dajun
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Correspondence to Chen Peidu.

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Yuan, J., Chen, P. & Liu, D. Development of Triticum aestivum-Leymus racemosus translocation lines using gametocidal chromosomes. Sci. China Ser. C.-Life Sci. 46, 522–530 (2003). https://doi.org/10.1360/01yc0298

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  • DOI: https://doi.org/10.1360/01yc0298

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