Production of a new wheat line possessing the 1BL.1RS wheat-rye translocation derived from Korean rye cultivar Paldanghomil |
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Authors: | Ko J M Seo B B Suh D Y Do G S Park D S Kwack Y H |
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Institution: | (1) National Yeongnam Agricultural Experiment Station, Milyang 627-803, Korea e-mail: kojmin@rda.go.kr Tel: +82-350-1228, Fax: +82-353-3050, KR;(2) Department of Biology, Kyungpook National University, Taegu 702-701, Korea, KR |
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Abstract: | The 1BL.1RS translocations between wheat (Triticum aestivum L.) and rye (Secale cereale L.) are widely used in bread wheat breeding programs, but all modern wheat cultivars with the 1BL.1RS have shown genetic
vulnerability due to one rye source – a German cultivar, Petkus. We have developed, a new 1BL.1RS wheat-rye translocation
line from the backcross of the F1 hybrid of wheat cv. Olmil and rye cv. Paldanghomil, both cultivars from Korea. The GISH technique was applied to identify
the presence of rye chromatin in 467 BC1F6 lines selected from 77 BC1F5 lines. Only one line, Yw62–11, showed wheat-rye translocated chromosomes, with a somatic chromosome number of 2n=42. C-banding
patterns revealed that the translocated chromosome was 1BL.1RS, showing prominent bands in the terminal and sub-terminal regions
of the short arm as well as in the centromeric region and terminal region of the long arm. This new 1BL.1RS translocation
line formed 21 bivalents like common wheat at meiotic metaphase I, thereby showing complete homology.
Received: 28 February 2001 / Accepted: 17 April 2001 |
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Keywords: | Triticum aestivum Secale cereale 1BL 1RS translocation Genomic in situ hybridization C-banding |
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