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INDUCED VARIABILITY IN Jatropha curcas L. BY GAMMA RAYS

KrishiKosh

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Title INDUCED VARIABILITY IN Jatropha curcas L. BY GAMMA RAYS
 
Creator NAYAK, DILESWAR
 
Contributor PATIL, N.S.
 
Subject planting, genotypes, sowing, developmental stages, enzymes, amino acids, proteins, germinability, mutation, biological phenomena
 
Description The present investigations were carried out at the Forestry Research Farm, Navsari Agricultural University; Navsari during the year 2008 – 2010 to evaluate the gamma rays induced variability in Jatropha curcas L. on germination, growth and yield. There were three levels of gamma radiation viz., 10 kR, 20 kR and 30 kR and seven genotypes were chosen namely, Hansraj, SDAUJ-1(Chhatrapati), Phule J-1, Urlikanchan, SKN Big, Hansot and MPJ - 55. The experiment was laid out in Completely Randomized Design with Factorial concept for nursery stage study while Factorial Randomized Block Design used for the field study.
During the investigation, effect of gamma rays on germination percentage recorded at 25 days after sowing of treated seeds. The observations were recorded on ten randomly selected seedlings from each treatment per replication for five characters viz., seedling height, seedling collar diameter, number of leaves per seedling, leaf area and seedling survival percentage were recorded at five months after sowing of the the treated seeds.
Twenty five identical seedlings from each treatment were selected from nursery for plantation in the experimental field at 150 DAS. Irrigation, weeding and cultural operations were carried out as per need. The observations were recorded on randomly selected plants for each replications for 23 characters,
viz. plant height, plant collar diameter, plant survival percentage, number of primary and secondary branches, leaf area, days taken flowering, pollen sterility, number of capsules per plant, total phenol content, total sugar content, free amino acid content, moisture content, superoxide dismutase, guaiacol peroxidase, seed yield, 100 seed weight (seed index) and seed oil content. The significantly maximum germination percentage, seedling survival, seedling collar diameter, shoots length, number of leaves per seedling and leaf area was observed in Chhatrapati genotype during nursery stage. The low rate of gamma rays treatment (10 kR) had stimulatory effect for germination percentage, seedling survival, seedling collar diameter, shoot length, number of leaves per seedling and leaf area. However, higher gamma rays doses drastically reduced all characters during nursery stage. The interaction effect of genotype and gamma rays were significant for number of leaves per seedling. However, it was not significant in other traits like germination percentage, seedling survival, seedling collar diameter, shoot length and leaf area. The individual effect of genotype on morphological characters like plant collar diameter and number of secondary branches were significantly in Chhatrapati genotype maximum for both seasons; however, plant height, number of primary branches, leaf area and days taken for first flowering were non-significant for both seasons as well as pooled analysis during field stage study. In this field study, the low rate of gamma rays (10 kR) has significant stimulatory effect for plant height, plant collar diameter, number of primary and secondary branches, leaf area and days taken for initiation of first flowering. However, traits under study decreased progressively with increasing rate of
gamma rays radiation. The interaction effect of genotype and gamma rays were non-significant for all morphological characters during field investigation. The individual effect of genotype on yield attributing characters like number of capsules per plant, seed yield per plant, 100 seed weight and oil content were significantly maximum in Chhatrapati genotype for both seasons and in pooled analysis. The gamma rays 10 kR, significantly influenced number of capsules per plant, seed yield per plant, 100 seed weight and oil content. Hence, low dose has stimulatory effect while higher dose has inhibitory effect in yield attributing characters during both years of field study. The interaction effect of genotype and gamma rays were non-significant for all yield attributing characters during field growth stage. Significant genotypic effect on biochemical characters like total soluble sugar, protein, free amino acid, total phenol content and moisture content were estimated maximum in Chhatrapati genotype. However, significant maximum guaiacol peroxidase was estimated in Hansot genotype. Similarly, superoxide dismutase was recorded significantly maximum under SKN Big genotype. The increase in gamma rays irradiation progressively increases total soluble sugar, protein, free amino acid, total phenol content, superoxide dismutase and guaiacol peroxidase in the leaves of J. curcas L. However, moisture content has inhibitory effect with increase in gamma rays during the field study. The interaction effect of genotypes and gamma rays treatment were found to be significant for GPOX activity in leaves of J. curcas L. The significantly highest GPOX activity was recorded under G5I3 (Chhatrapati, 30 kR). However, the interaction effect of genotype and gamma rays treatment of other biochemical traits were non-significant during field growth stage.
 
Date 2016-05-02T10:50:04Z
2016-05-02T10:50:04Z
2012-04
 
Type Thesis
 
Identifier http://krishikosh.egranth.ac.in/handle/1/65721
 
Language en
 
Format application/pdf
 
Publisher Navsari Agricultural University, Navsari