Effect of ionizing radiations and chemical mutagens on chiasma frequency in Sorghum

Sree Ramulu, K. (1971) Effect of ionizing radiations and chemical mutagens on chiasma frequency in Sorghum. Cytologia, 36 (3). pp. 543-551.

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Abstract

Grains of the varieties Co12 and Co18 of S. subglabrascens (2n = 20) and of one variety, Co11, of S. durra (2n = 20) were treated with X rays, gamma rays, ethyl methanesulphonate (EMS), methyl methanesulphonate (MMS), diethyl sulphate, N-nitroso-N-ethylurea (NEU) and combination treatments of the physical and chemical mutagens. All the treatments resulted in a decrease in the chiasma frequency in M1 plants compared with the untreated controls. There was a reduction in the number of bivalents with three chiasmata, while the number of bivalents with one chiasma increased following mutagen treatment. NEU and EMS in Co11, MMS in Co12 and X rays and NEU in Co18 caused a higher decrease in the frequency of chiasmata than the other treatments.

Item Type: Article
Author Affiliation: Department of Genetics, Agricultural College and Research Institute Tamilnadu Agricultural University 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 06:13
Last Modified: 30 May 2012 06:14
Official URL: http://dx.doi.org/10.1508/cytologia.36.543
URI: http://eprints.icrisat.ac.in/id/eprint/5941

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