Induced structural changes and meiotic aberrations in Sorghum

Sree Ramulu, K. (1971) Induced structural changes and meiotic aberrations in Sorghum. Cytologia, 36 (2). pp. 229-236.

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Abstract

Two varieties (Co12 and Co18) of S. subglabrescens and one (Co11) of S. durra were treated with X rays and gamma rays and with ethyl methanesulphonate, methyl methanesulphonate, diethyl sulphate and N-nitroso-N-ethylurea; grains of the three varieties were also subjected to various combinations of the physical and chemical mutagens. Various chromosomal aberrations were noted in the M1 plants; reciprocal translocations were the most frequent. The commonest types of translocations observed were those having ring and rod configurations. There was a positive correlation between the percentage of M1 plants carrying chromosomes with interchanges and mutagen dose. Treatment with gamma rays and X rays induced not only a greater frequency of interchanges per cell but also a higher percentage of PMCs with quadrivalents than treatment with the four chemical mutagens. Meiotic anomalies other than translocations were mostly laggards, bridges, tripolar spindles, micronuclei and multinucleoli.

Item Type: Article
Author Affiliation: Faculty of Cytogenetics and Plant Breeding Agricultural College and Research Institute 2) Department of Genetics, Agricultural University
Subjects: Crop Improvement
Plant Physiology and Biochemistry > Biochemistry
Divisions: Sorghum
Depositing User: Mr. SanatKumar Behera
Date Deposited: 30 May 2012 06:10
Last Modified: 30 May 2012 06:10
Official URL: http://dx.doi.org/10.1508/cytologia.36.229
URI: http://eprints.icrisat.ac.in/id/eprint/5940

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