scholarly journals Radiosensitivity of Some Local Cultivars of Wheat (Triticum Aestivum L.) to Gamma Irradiation

2012 ◽  
Vol 41 (1) ◽  
pp. 1-5 ◽  
Author(s):  
MMA Albokari ◽  
SM Alzahrani ◽  
AS Alsalman
Keyword(s):  
Dna Damage ◽  
Triticum Aestivum ◽  
Saudi Arabia ◽  
Gamma Irradiation ◽  
Gamma Rays ◽  
Triticum Aestivum L ◽  
Radiation Doses ◽  
Seedling Height ◽  
Height Data ◽  
Different Doses

Seeds of four local wheat (Triticum aestivum L.) cultivars, namely Hinta, Khaliji, Lokaimy and Qasime collected from different regions of Saudi Arabia were exposed to different doses of gamma rays 50-500 Gy to determine suitable doses for induction of mutation. It was observed that seedling height decreased with the increased dose of radiation in all cultivars. Radiosensitive curve originated from seedling height data resulted in 179, 225, 249 and 256 Gys as LD50 values for the cultivars Hinta, Khaliji, Qasime and Lokaimy, respectively. Based on LD50, as to minimize DNA damage and reduce undesirable mutations, radiation doses which lie between 200 and 250 Gy can be considered suitable for induction of mutation in cultivars Lokaimy, Khaliji and Qasime while between 150 and 200 Gy for cultivar Hinta DOI: http://dx.doi.org/10.3329/bjb.v41i1.11075 Bangladesh J. Bot. 41(1): 1-5, 2012 (June)

Analysis of induced homoeologous pairing in hybrids between 6x triticale ph1 mutant and Triticum aestivum L.

1986 ◽  
Vol 28 (5) ◽  
pp. 696-700 ◽  
Author(s):  
Nicolás Jouve ◽  
Benito Giorgi
Keyword(s):  
Triticum Aestivum ◽  
Triticum Aestivum L ◽  
Wheat Breeding ◽  
Hexaploid Triticale ◽  
D Genome ◽  
Level Of Involvement ◽  
Mother Cells ◽  
Homoeologous Chromosomes ◽  
Different Doses ◽  
Induced Homoeologous Pairing

The meiotic behaviour of three hexaploid triticale × Triticum aestivum L. hybrids having different doses of ph1 mutant alleles was investigated using C-band staining of pollen mother cells at first metaphase. D-genome chromosomes that were clearly distinguished by their small size and unbanded response to Giemsa staining were increasingly promoted to pair with the homoeologous chromosomes of the A and B genomes in the absence of Ph1 genes. However, the wheat–rye associations were not enhanced when one or two ph1 alleles were present. The distribution of meiotic configurations was significantly different for each chromosome in the ph1/ph1 hybrid. Thus, 1B did not form multivalents in this hybrid, and the remaining identified chromosomes differed significantly in the level of involvement in tri-, quadri-, or quinque-valents. The hybrids should be of value for hexaploid and wheat breeding programs.Key words: Triticale, Triticum aestivum, C-banding, ph1 mutants.

Effect of gamma irradiation on toxicity and immunogenicity of Androctonus australis hector venom

2003 ◽  
Vol 81 (12) ◽  
pp. 1118-1124 ◽  
Author(s):  
Lila Abib ◽  
Fatima Laraba-Djebari
Keyword(s):  
Gamma Irradiation ◽  
Immunosorbent Assay ◽  
Gamma Rays ◽  
Enzyme Linked Immunosorbent Assay ◽  
Radiation Doses ◽  
Immunological Properties ◽  
Neutralizing Capacity ◽  
Ld50 Value ◽  
Lethal Doses

An investigation was made of the radiosensitivity of the toxic and immunological properties of Androctonus australis hector venom. This venom was irradiated with two doses of gamma rays (1 and 2 kGy) from a 60Co source. The results showed that venom toxicity was abolished for the two radiation doses (1 and 2 kGy) with, respectively, 10 and 25 times its initial LD50 value. However, irradiated venoms were immunogenic, and the antibodies elicited by them were able to recognize the native venom by enzyme-linked immunosorbent assay. Antisera raised against these toxoids (1 and 2 kGy) had a higher neutralizing capacity and immunoreactivity against all components of native venom than did the antiserum produced against the native venom. The antiserum of rabbits immunized with 2-kGy-irradiated venom was more efficient than 1-kGy-irradiated toxoid antiserum. Indeed, in vivo protection assays showed that the mice immunized with 2-kGy-irradiated venom resisted lethal doses (i.p.) of A. australis hector venom.Key words: venom, Androctonus australis hector, gamma irradiation, immunogenicity, in vivo protection.

scholarly journals Effect of gamma irradiation on poly(vinyledene difluoride)–lithium bis(oxalato)borate electrolyte

2014 ◽  
Vol 16 (23) ◽  
pp. 11527-11537 ◽  
Author(s):  
Mimi Hayati Abdul Rahaman ◽  
Mayeen Uddin Khandaker ◽  
Ziaul Raza Khan ◽  
Mohd Zieauddin Kufian ◽  
Ikhwan Syafiq Mohd Noor ◽  
...  
Keyword(s):  
Gamma Irradiation ◽  
Polymer Electrolyte ◽  
Gamma Rays ◽  
Solid Polymer Electrolyte ◽  
Solid Polymer ◽  
Solvent Casting ◽  
Casting Method ◽  
Different Doses

A poly(vinyledene difluoride)–lithium bis(oxalato)borate solid polymer electrolyte prepared by a solvent casting method has been irradiated with different doses of gamma-rays.

scholarly journals Effects of Co 60 Gamma Irradiation on Corn Pollen

1969 ◽  
Vol 50 (1) ◽  
pp. 10-17
Author(s):  
Vicente Rodríguez ◽  
D. B. Linden
Keyword(s):  
Gamma Irradiation ◽  
Gamma Rays ◽  
Dose Response ◽  
Germination Percentage ◽  
Seedling Height ◽  
Corn Pollen ◽  
Dose Levels ◽  
Higher Doses ◽  
Germinated Seeds

Corn tassels were irradiated using Co 60 gamma rays at dose levels from 250 to 20,000 r. Twenty-four and forty-eight hours after irradiation the pollen was collected from the tassels and used to fertilize ears. The quantity of good seeds per ear, the germination percentage of these good seeds, and the seedling height 7 and 14 days later of the plants from these germinated seeds were recorded. No seeds were obtained beyond 4,000 r. There was little effect from pollen used 24 hours after treatment compared ivith pollen used 48 hours after treatment for any of the characters measured. There was a general dose response for number of good seeds per ear, and also in the percentage of germination of those seeds classified as good. The higher doses reduced both numbers of good seeds and their germination. There was no evident dose response of seedling height, if the seed did germinate it grew about as well as any at the dose levels measured.

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