GrainGenes Reference Report: CRU-35-46
Reference
CRU-35-46
Title
Comparison between chemical and physical mutagen in oat populations
Journal
Ciencia Rural
Year
2005
Volume
35
Pages
46-55
Author
Coimbra JLM Carvalho FIF Oliveira AC Silva JAG Lorencetti C
Abstract
Hexaploid oat genetic variability was compared in populations treated with physical and chemical mutagens by conducting a field evaluation of vegetative cycle in Pelotas, Rio Grande do Sul, Brazil, during 1997-98 and 1998-99. Seeds of genotypes CTC-3, UFRGS-10, UFRGS-14 and UPF-16 were irradiated with 0.25 Gy/min. The total absorbed doses for the physical mutagen were 100, 200 and 400 Gy and for the chemical mutagen 0.5, 1.5 and 3.0% per treatment of 1200 seeds, in each genotype. A difference in efficiency between mutagens was detected. The physical mutagen was always superior to the chemical mutagen regardless of the generation, providing a higher increase in the number of phenotypic classes, either leading to a reduction or increase in the number of days between emergence and flowering. The genotypes showed a differential sensitivity to the doses of mutagens, indicating a range of treatment efficiency in altering the genetic variability, either for early or late vegetative cycle. In general, the results pointed to a decrease in the vegetative cycle when an increase in the mutagen dose was applied. The study of populations UPF-16 at doses of 100 and 200 Gy subjected to treatment with physical mutagen pointed to a higher degree of genetic divergence and dominance for the vegetative cycle
Keyword
dominance
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GrainGenes is a product of the Agricultural Research Service of the US Department of Agriculture.
GrainGenes Reference Report: CRU-35-46
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GrainGenes is a product of the Agricultural Research Service of the US Department of Agriculture. | |||