Mutagenic effectiveness, efficiency and dose optimization of gamma rays in papaya (Carica papaya L.) varieties

doi:10.37992/2022.1304.158

Cited by 2 publications

(1 citation statement)

References 27 publications

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“…In general, it was observed that the germination, survival, and growth rate of papaya exhibited a downward trend as the gamma irradiation dosages were raised. According to Ravi et al (2022), Signi cantly, the ndings of this study are consistent with previous research conducted by Zamir et al (2003), which also reported that the percentage of sprouting was greater at lower concentrations of irradiation doses compared to higher concentrations in Guava plants. This observation indicates that the trend observed in the sprouting buds could perhaps be attributed to the carcinogenic impact of irradiation on chromosome abnormalities.…”

Section: Discussionsupporting

confidence: 92%

Standardization of suitable Gamma irradiation doses 60 Co for mutagenesis in strawberry (Fragaria × annanasa Duch) cv. Chandler

Rodge,

Rajan,

Sharma

et al. 2023

Preprint

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The process of mutation breeding for strawberry varieties entailed subjecting runner sections to irradiation, specifically utilizing three unique dosages of 60Co-gamma rays. The present study was carried out at Lovely Professional University, wherein strawberry runners belonging to the cv. Chandler were subjected to varying dosages of acute gamma radiation. The irradiation therapy was conducted at Punjab Agriculture University using the 60Co source. Different concentrations, namely 20 Gy, 30 Gy, 40 Gy, and 0 Gy, were administered at a consistent dosage rate of 1.52 Gy per minute. The physiological effects arising from irradiation were evaluated by the LD50 analysis, which was measured 30 days post-transplantation, serving as a benchmark for three distinct levels of irradiation dosages. The highest mortality rate was recorded in the group exposed to the maximal dosage of irradiation, which was 40 Gy. In addition to the control group, it was noted that the irradiated dose of 20Gy yielded the greatest plant height, fruit length, and diameter, while the lowest results were obtained from the 40 Gy treatment. Furthermore, the 20 Gy dose exhibited the largest leaf area index, number of leaves, and chlorophyll levels, whereas the 40 Gy treatment yielded the lowest outcomes. The occurrence of early flower bud formation was documented at a dose of 30 Gy, while late flower bud formation was observed at a dose of 20 Gy. Additionally, early flowering was noted at a dose of 40 Gy, with late flowering occurring at a dose of 20 Gy. Furthermore, early fruit set was found at a dose of 40 Gy, while late fruit set was observed at a dose of 20 Gy. In our observation of yield, we recorded the largest number of buds, flowers, and fruits at a radiation dose of 20 Gy. Conversely, we noticed a lesser number of buds with a radiation dose of 40 Gy. The results indicate that the maximum values for primary secondary root length and root number were recorded in the 30 Gy treatment, while the lowest values were observed in the 40 Gy treatment. Additionally, a greater number of deformed fruit and leaves were observed in the 40 Gy treatment of gamma irradiation dose. These findings would be beneficial in future endeavours aimed at producing potential mutants in the strawberry plant.

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Section: Discussionsupporting

confidence: 92%

Standardization of suitable Gamma irradiation doses 60 Co for mutagenesis in strawberry (Fragaria × annanasa Duch) cv. Chandler

Rodge,

Rajan,

Sharma

et al. 2023

Preprint

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Determination of mutagenic sensitivity and its manifestations on papaya (Carica papaya L.) cv. Arka Prabhath

Bhat,

Dinesh,

Vageeshbabu

et al. 2023

J. Hortic. Sci.

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Papaya is an important fruit crop of the family Caricaceae which needs the improvement in terms of virus resistance and shelf life with dwarf stature. Mutation breeding technique has been considered as an efficient tool adopted by plant breeders to create variability in papaya. The mutation frequency and population structure of the mutants directly depend upon the type of mutagen and the time of exposure. Irrespective of the used mutagens, the ultimate induced mutations are random and therefore determination of mutagenic sensitivity is important pre-requisite. Based on this, investigation on the induction of mutation in papaya cv. Arka Prabhath was carried out with the objective of creating genetic variability through physical mutagen. In this study, papaya seeds were irradiated with five different dose of gamma rays ranging from 50 Gy to 500 Gy. The results revealed that gradual reduction in germination, survival of seedlings and delayed germination with increase in dosage of gamma rays. Based on probit analysis, LD50 (Lethal dose) was fixed at 186.24 Gy. Total seven types of chlorophyll mutants were observed as a result of mutation. Mutagenic efficiency and effectiveness were higher in a lower dose of gamma treatment (50 Gy).

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Mutagenic effectiveness, efficiency and dose optimization of gamma rays in papaya (Carica papaya L.) varieties

Cited by 2 publications

References 27 publications

Standardization of suitable Gamma irradiation doses 60 Co for mutagenesis in strawberry (Fragaria × annanasa Duch) cv. Chandler

Standardization of suitable Gamma irradiation doses 60 Co for mutagenesis in strawberry (Fragaria × annanasa Duch) cv. Chandler

Determination of mutagenic sensitivity and its manifestations on papaya (Carica papaya L.) cv. Arka Prabhath

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