Induction of mutagenesis in Periwinkle (Catharanthus roseus L.) through gamma irradiation

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dc.contributor.advisorDhatt, K.K.
dc.contributor.authorKamarpal Singh
dc.date.accessioned2023-01-08T09:34:05Z
dc.date.available2023-01-08T09:34:05Z
dc.date.issued2022
dc.description.abstractThe present experiment entitled "Induction of mutagenesis in periwinkle (Catharanthus roseus L.) through gamma irradiation" was conducted at Floriculture Research Farm of Punjab Agricultural University, Ludhiana during the year 2020-2021. The seedlings of periwinkle were treated with 0Gy, 25Gy, 50Gy, 75Gy and 100Gy with the objective to analyze the effect of different dose of gamma radiation on plant growth and flowering the different dose of gamma rays in periwinkle. To induce mutation and to analyze the gamma radiation treatment led the significant changes in the agronomical traits such as mortality rate, plant height, plant spread, leaf length, leaf width, leaf area, number of plant per plants, flower color, flower size, leaf color and stem girth etc. The maximum morality was observed at 100Gy i.e 23.52% while it was minimum at 25Gy treatment and in untreated plants. The highest rate of survival was observed in 25Gy treatment (88.24%) and the minimum survival % was recorded at 100Gy treatment (50.99%). The plant height and plant spread decreased significantly with the increase in gamma ray dose and recorded maximum in 25Gy treatment i.e 77.34cm and 90.14cm. Maximum number of primary branches with 25Gy treated plants was increased up to 5.40/plant. The leaf length (6.63cm), leaf width (2.76cm) and leaf area (18.36cm2) was recorded to be maximum under 25Gy treatment. The plants treated with 100Gy treatment took longer time to flowering as compared with lower dose of 25Gy treatment. The flower number decreased significantly with the increase in gamma ray dose and recorded maximum in 25Gy treatment. Slight variation in flower color of plants treated with 75Gy and 100Gy was recorded in three plants and it was Purple (P N 78 B) and Purple (P N 78 C), whereas there is no change in leaf color. The flower size decreased to 4.34cm at higher dose of 75Gy. The optimum dose of gamma rays for induction of mutagenesis for periwinkle is 75Gy and 100Gy.en_US
dc.identifier.citationKamarpal Singh (2022). Induction of mutagenesis in Periwinkle (Catharanthus roseus L.) through gamma irradiation (Unpublished M.Sc. thesis). Punjab Agricultural University, Ludhiana, Punjab, India.en_US
dc.identifier.urihttps://krishikosh.egranth.ac.in/handle/1/5810191527
dc.keywordsperiwinkle, gamma irradiation, flower, vinca.en_US
dc.language.isoEnglishen_US
dc.pages60en_US
dc.publisherPunjab Agricultural University, Ludhianaen_US
dc.research.problemInduction of mutagenesis in Periwinkle (Catharanthus roseus L.) through gamma irradiationen_US
dc.subFloriculture and Landscapingen_US
dc.themeInduction of mutagenesis in Periwinkle (Catharanthus roseus L.) through gamma irradiationen_US
dc.these.typeM.Scen_US
dc.titleInduction of mutagenesis in Periwinkle (Catharanthus roseus L.) through gamma irradiationen_US
dc.typeThesisen_US
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