EDITOR-IN-CHIEF
Dr. Khuda Bakhsh, Ph.D.,
Professor,Department of Education
GC University Faisalabad
Pakistan.
Email: khudabakhsh@gcuf.edu.pk
editorinchiefijmasri@gmail.com
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Ranjitha
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606104
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STUDIES ON CYTOLOGICAL ABNORMALITIES INDUCED BY GAMMA RAYS, EMS AND THEIR COMBINATION IN SESAME (SESAMUM INDICUM L.) VAR.TMV3
The present study deals with the
cytological abnormalities induced by gamma rays, EMS and their combination in
sesame (Sesamum indicum L.) var.TMV3. The seeds of sesame var.TMV3 were treated
with different doses of gamma rays (30, 40, 50, 60 and 70KR), various
concentrations of EMS (0.6, 0.8, 1.0, 1.2 and 1.4mM) and their combinations
(30KR+0.6mM, 40KR+0.8mM, 50KR+1.0mM, 60KR+1.2mM and 70KR+1.4mM). Through root
tip squash technique and mitotic studies, various cytological abnormalities
induced by different mutagens and treatments as said above were studied in the
crop used. The results showed the dose dependent influence in the induction of
chromosomal/ cytological abnormalities and it was more pronounced as the doses
/concentrations of mutagens increased. The main chromosomal aberrations like
stickiness, precocious movements, laggards, bridges and ring chromosomes were
observed. Though the abnormalities increased with increasing doses or
concentrations of mutagens, the mitotic index was gradually declined with
increasing doses or concentrations of mutagens.
- 2020-12-25 17:56:52 Subject Area - Botany
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