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A plant having a double interchange was isolated from the population raised from gamma ray irradiated seeds in P. typhoides cv. Mainpuri. The plant was morphologically distinct in being weaker and much shorter than its normal counterparts. Diakinesis–Metaphase I configurations revealed the predominance of a hexavalent along with 4 bivalents. In a few PMCs univalents along with variable no. of bi and multivalents could also be observed. Anaphase I studies exhibited various anomalies as well, like unequal separation, bridges and lagging chromosomes. Perhaps, due to these overwhelming chromosomal aberrations pollen fertility was drastically reduced. The paper discusses the meiotic behaviour of this translocation heterozygote and analyses the probable causes for peculiar observations.

Meiotic Behaviour of Induced Translocation Heterozygote in Pearl Millet (Pennisetum typhoides)