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Meiosis of Wheat × Lymegrass Hybrids

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Abstract

Meiosis was examined in pollen mother cells of F1 hybrids made from crosses between wheat (Triticum aestivum) and lymegrass (Leymus arenarius and L. mollis). Fluorescence genomic in situ hybridization detected pairing between wheat and lymegrass chromosomes during prophase I and metaphase I. Such pairing, when resulting in bivalent formation, was likely to yield correct disjunction, and hence intergenomic recombination could be incorporated into the gametes. Bivalents in these hybrids, however, were more frequently formed between chromosomes of the same parental origin. Univalents were common, whereas multivalents were not clearly detected. Meiotic behaviour in some cells was not totally aberrant, and this may have accounted for the presence of normal pollen. The results are discussed in relation to intergenomic pairing, meiotic behaviour in wide-hybrids and genome relationships, including the Leymus genome origin.

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Authors and Affiliations

  1. University of Iceland, Institute of Biology, Grensásvegi 12, ReykjavUk, IS-108, Iceland

    Kesara Anamthawat-jónsson

  2. Agricultural Research Institute (RALA), Keldnaholt, ReykjavUk, IS-112, Iceland

    Sigrídur Klara Bödvarsdóttir

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  1. Kesara Anamthawat-jónsson
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  2. Sigrídur Klara Bödvarsdóttir
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Anamthawat-jónsson, K., Bödvarsdóttir, S.K. Meiosis of Wheat × Lymegrass Hybrids. Chromosome Res 6, 339–344 (1998). https://doi.org/10.1023/A:1009281911723

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