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C-banded karyotypes and meiotic abnormalities in germplasm derived from interploidy crosses in Avena

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Abstract

C-banded karyotypes of somatic chromosomes and meiotic abnormalities were investigated in four crown rust resistant lines derived from interploidy crosses in Avena.C-banding revealed that line N770-165-2-1 contained a 6C/21translocation while line DCS1789 contained a pair of A. strigosa chromosomes substituted for A. sativachromosome 12. Line JR2-3-3-B contained both the 6C/21 translocation and the pair of substituted A. strigosachromosomes, but line MAM17-4 contained neither. Although meiotic irregularities, including mispositioned bivalents, occurred in all four lines and in their F1 hybrids with A. sativa, the percentages of normal meiosis ranged from 75.4 to 88.6%. This allowed for stability of line performance and for their use as breeding stocks.

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Authors and Affiliations

  1. Department of Agronomy, University of Wisconsin-Madison, 1575 Linden Drive, Madison, WI, 53706, U.S.A.

    M. Dilkova & R.A. Forsberg

  2. Department of Agronomy and Horticulture, 275 WIDB, Brigham Young University, Provo, UT, 84602, U.S.A.

    E.N. Jellen

Authors
  1. M. Dilkova
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  2. E.N. Jellen
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  3. R.A. Forsberg
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Dilkova, M., Jellen, E. & Forsberg, R. C-banded karyotypes and meiotic abnormalities in germplasm derived from interploidy crosses in Avena . Euphytica 111, 175–184 (2000). https://doi.org/10.1023/A:1003855831536

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