Interfering with regular meiotic behaviour in Avena sativa as a method of incorporating the gene for mildew resistance from A. barbata |
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| Authors: | Hugh Thomas W Powell T Aung |
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| Institution: | (1) Welsh Plant Breeding Station, Plas Gogerddan, SY23 3EB nr Aberystwyth, Dyfed, Wales, UK |
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| Abstract: | Summary The regular meiotic behaviour of the cultivated oat Avena sativa (2n=6x=42) is genetically controlled. The factors which control the diploid-like meiotic behaviour also restrict the amount of pairing that occurs between alien chromosomes and their homoeologues in A.sativa, and hence increases the difficulties of introducing desirable variation from wild species into the cultivated oat. A genotype of the diploid species A.longiglumis which interferes with the regular meiotic behaviour of A. sativa can be used to induce pairing between alien chromosomes and their corresponding chromosomes in A. sativa. Using this procedure the dominant gene conferring mildew resistance has been transferred from the tetraploid weed species A. barbata into the cultivated oat. |
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| Keywords: | Avena sativa oat Avena barbata wild oat mildew resistance gè ne transfer meiotic behaviour |
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