Desynapsis as well as Inversion Heterozygosity in the Natural Popluation of Triploid Colocasia antiquorum Schott

Abstract

During investigation of meiotic behaviour of wild triploid Colocasia antiquorum Schott, desynapsis as well as inversion heterozygosity were found in the same plant of a population. Partial pairing of chromosomes at diakinesis and lack of pairing at metaphase I were found. Variable number of univalents, viz., 42 and 14 were found in pollen mother cells at metaphase I. This stage also was characterized by pycnotic behaviour of chromosomes. Bridges with fragment at anaphase and telophase one and two indicated the presence of inversion heterozygosity. In addition to these, meiosis was also characterized by other different abnormalities.