Meiotic Behavior of Hybrids Involving Rosa laevigata.

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  • Ma Yan
    Department of Horticultural Sciences, Texas A&M University
  • Crane Charles F.
    Department of Soil and Crop Sciences, Texas A&M University
  • Byrne David H.
    Department of Horticultural Sciences, Texas A&M University

Abstract

Meiotic chromosome configuration frequencies at diakinesis and metaphase I were tabulated in diploid and induced tetraploid Rosa laevigata Michx., diploid R. roxburghii Tratt., and tetraploid amphidiploids of R. laevigata with R. roxburghii and R. banksiae Ait. Numerical analysis of configuration frequencies suggests up to two-fold length variation between short and long chromosome arms in the diploids, and incomplete independence of chromosome arms during pairing and chiasma formation in the tetraploids. Since the sampled genomes pair homeologously in intersubgeneric amphidiploids, they are relatively closely related. The meiotic data collectively suggest that R. roxburghii should be classified in subgenus Rosa.

Journal

  • CYTOLOGIA

    CYTOLOGIA 61 (4), 457-463, 1996

    Japan Mendel Society, International Society of Cytology

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