Desynaptic Trisomics in Pearl Millet Pennisetum americanum (L.) Leeke

• Published in: CYTOLOGIA Vol. 54; no. 2; pp. 343 - 346
• Main Author: Vari, Alice K.
• Format: Journal Article
• Language: English
• Published: Tokyo Japan Mendel Society, International Society of Cytology 25.06.1989; Japan Mendel Society; Japan Science and Technology Agency
• Subjects: Biological and medical sciences; Cytogenetics; Fundamental and applied biological sciences. Psychology; Genetics of eukaryotes. Biological and molecular evolution; Pteridophyta, spermatophyta; Vegetals and fungi; Chromosomal aberration; Genetic mapping; Monocotyledones; Trisomy; Chromosome pairing; Aneuploidy; Chromosome; Meiosis; Pennisetum typhoides; Gametocyte; Cereal crop; Gene; Gramineae; Angiospermae; Chromosome association; Cytogenetics; Spermatophyta; Mutation
• ISSN: 0011-4545; 1348-7019
• DOI: 10.1508/cytologia.54.343

Meiosis is an integrated process consisting of a series of events which have been shown to be under genetic control. Abnormalities in the normal course of meiosis, especially failure of chromosome pairing has been reported to be occurring spontaneously in various plant species. Chromosome pairing normally at early meiotic prophase when tends to fall apart precociously at diplotene or early diakinesis, the phenomenon is referred to as desynapsis. Desynapsis has been reported in Pennisetum typhoides by Patil and Vohra (1962), Jauhar (1969), Minocha et al. (1968) etc. In the present investigation, desynaptic trisomic plants were identified in the progeny of a primary trisomic of P. americanum (P. typhoides ). The meiotic behaviour and the probable location of desynaptic gene have been discussed.