Articles
INDUCED GENETIC VARIABILITY AND THEIR EXPLOITATION IN CHAMOMILE (CHAMOMILLA RECUTITA [L.] RAUSCHERT)
Article number
749_9
Pages
103 – 109
Language
English
Abstract
The dry seeds of chamomile (Chamomilla recutita [L.] Rauschert) were irradiated with 10 doses of gamma rays 60Co source (10 to 100 kR with the interval of 10 kR doses) to induce variability in plant morphology and flower and oil yield of better quality.
Chamomile was found to be highly sensitive to gamma ray treatment and produced a wide range of qualitative and morphological changes in shape and size especially of flowers.
Quantitative variation of flower yield and its component traits occurred in significant measures.
Mutagenesis changed the mean values for different agronomical traits in both positive and negative directions.
As a result of greater mutagenic efficacy, two promising mutants M-20-20 and MDEL-1 were isolated.
While gamma irradiation caused reduction in growth characters like plant height and mean flowers yield.
The irradiation also affected the mean flowers and oil yield in positive/negative directions.
Gamma irradiation doses also altered the quality.
Thus, some key enzymes responsible for biosynthesis of quality components were mutated due to irradiation.
As a result of greater mutagenic efficacy and massive screening, two promising mutants M-20-20 and MDEL-1 were isolated.
After evaluation in different field trials one variety, Vallary, is released for commercial cultivation and another is in the pipeline to release for commercial cultivation.
Chamomile was found to be highly sensitive to gamma ray treatment and produced a wide range of qualitative and morphological changes in shape and size especially of flowers.
Quantitative variation of flower yield and its component traits occurred in significant measures.
Mutagenesis changed the mean values for different agronomical traits in both positive and negative directions.
As a result of greater mutagenic efficacy, two promising mutants M-20-20 and MDEL-1 were isolated.
While gamma irradiation caused reduction in growth characters like plant height and mean flowers yield.
The irradiation also affected the mean flowers and oil yield in positive/negative directions.
Gamma irradiation doses also altered the quality.
Thus, some key enzymes responsible for biosynthesis of quality components were mutated due to irradiation.
As a result of greater mutagenic efficacy and massive screening, two promising mutants M-20-20 and MDEL-1 were isolated.
After evaluation in different field trials one variety, Vallary, is released for commercial cultivation and another is in the pipeline to release for commercial cultivation.
Authors
R.K. Lal, S.P.S. Khanuja
Keywords
Chamomila recutita, irradiation, mutagenic efficacy, mutagenesis, polygenic variation, qualitative traits, ray florets
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