Production of a new wheat cultivar with a different 1B.1R translocation with resistance to powdery mildew and stripe rust

Tang, Z. and Fu, S. and Ren, Z. and Zhang, H. and Yang, Z. and Yan, B. and Zhang, H. (2008) Production of a new wheat cultivar with a different 1B.1R translocation with resistance to powdery mildew and stripe rust. Cereal Research Communications, 36 (3). pp. 451-460. ISSN 0133-3720

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Abstract

Wheat-rye 1BL.1RS translocations have been widely used in wheat breeding programs. A 1BL.1RS translocation wheat line, 91S-23, was developed from a 1R monosomic addition of the rye (Secale cereale) inbred line L155 into wheat (Triticum aestivum) MY11. A new commercial wheat cultivar, CN18, which also contained the 1BL.1RS translocation, was derived from the cross MY11 × 91S-23. Polymerase chain reaction (PCR) and fluorescence in situ hybridization (FISH) indicated that the rye centromere was eliminated from the 1BL.1RS chromosomes of CN18 but not from 91S-23. Based on the 1RS source and the centromeric structure of the translocation chromosome, CN18 qualifies as a new wheat cultivar possessing a 1BL.1RS translocation. CN18 displayed high yield performance and resistance to powdery mildew and stripe rust, whereas 91S-23 was susceptible to these diseases. The present study provides a new 1RS resource for wheat improvement.

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