Online ISSN : 1348-7019
Print ISSN : 0011-4545
Meiosis in Untreated and Irradiated Cyperus eragrostis Vahl
F. S. Bokhari
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1976 Volume 41 Issue 3-4 Pages 607-614


A cytological investigation of meiosis in seed irradiated Cyperus eragrostis has shown that the diffuse centromeric type of chromosome organisation leads to the formation of inviable chromosome complements, in which complex configurations resulting from stickiness as well as pairing of homologous regions, and numerous fragments, persist to the formation of pollen grains.
At the higher doses, however, there is complete sterility, and low fertility even at the lower doses. The small numbers of M2 and M3 plants produced at lower doses show much reduced chromosomal abnormalities, indicating severe selection among the gametes and zygotes formed.
There is little advantage in terms of survival from radiation damage, resulting from the possession of the diffuse centromere.

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