Abstract
Novel dwarfing germplasms and dwarfing genes are valuable for the wheat breeding. A novel semi-dwarf line, 31505-1, with reduced height compared with its common wheat parent, was derived from a cross between common wheat and Thinopyrum ponticum. Cytological studies demonstrated that 31505-1 contained 42 chromosomes and formed 21 bivalents at meiotic metaphase I. Genomic in situ hybridization (GISH) analysis showed that 31505-1 had no large Th. ponticum chromosome fragments. Fluorescence in situ hybridization (FISH) results revealed the absence of a pAs1 hybridization band on 2DL chromosome of 31505-1. Two SSR markers (Xwmc41 and Xcfd168) and two STS markers (Xmag4059 and Xmag3596), which were located on 2D chromosome, amplified unique bands of Th. Ponticum in 31505-1. These revealed presence of an introgressed Th. ponticum segment in 2DL chromosome of dwarf line 31505-1, although the alien segment could not be detected by GISH.
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The authors thank Dr Hongjie Li, Institute of Crop Science, The Chinese Academy of Agricultural Sciences, Beijing 100081, PR China, and Dr RA McIntosh, Plant Breeding Institute, Sydney University, Australia, for their valuable advice for this manuscript.
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[Chen G, Zheng Q, Bao Y, Liu S, Wang H and Li X 2012 Molecular cytogenetic identification of a novel dwarf wheat line with introgressed Thinopyrum ponticum chromatin. J. Biosci. 37 1–7] DOI
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Chen, G., Zheng, Q., Bao, Y. et al. Molecular cytogenetic identification of a novel dwarf wheat line with introgressed Thinopyrum ponticum chromatin. J Biosci 37, 149–155 (2012). https://doi.org/10.1007/s12038-011-9175-1
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DOI: https://doi.org/10.1007/s12038-011-9175-1