Characterization of a new T2DS.2DL-?R translocation triticale ZH-1 with multiple resistances to diseases
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Abstract
In the present study, we report on a new triticale (×Triticosecale Wittm.) ZH-1, derived from the progeny of common wheat (Triticum aestivum L.) cv. MY15 × Chinese Weining rye (Secale cereale L.). ZH-1, exhibiting shorter plant height and higher tillering ability compared to MY15, is immune to both powdery mildew and stripe rust and has stable fertility. Genomic in situ hybridization (GISH), fluorescence in situ hybridization (FISH) and C-banding revealed that the chromosome composition of triticale ZH-1 was 14 A-genome (1A-7A), 12 B-genome (1B-2B, 4B-7B), 12 R-genome (1R, 3R-7R), chromosomes 6D and T2DS.2DL-?R. Moreover, the PCR results of PLUG and EST-SSR markers also strongly supported the above stated chromosome composition of triticale ZH-1. In addition, the physical mapping of chromosome T2DS.2DL-?R showed a minute chromosomal fragment derived from rye was attached at the distal end of 2DL. The new triticale ZH-1 could be a valuable source for wheat improvement, especially for resistance to disease.
Keywords
C-banding FISH GISH Triticale Wheat-rye small-segment-translocationNotes
Acknowledgments
This work was supported by the National Natural Science Foundation of China (No. 30800685, No. 30730065 and No. 30900779) and China Postdoctoral Science Foundation (No. 20090461333). We particularly thank Dr. Peigao Luo for his helpful revising the manuscript.
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