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Relative Biological Effectiveness of 14-MeV Fast Neutrons to Co{sup 60} Gamma-Rays in Einkorn Wheat; Efficacite Biologique Relative des Neutrons Rapides de 14 MeV par Rapport aux Rayons Gamma de {sup 60}Co sur l'Engrain; Otnositel'naya biologicheskaya ehffektivnost' bystrykh nejtronov s ehnergiej 14 MeV i gamma-luchej CO{sup 60} pri ikh dejstvii na pshenitsu odnozernyanku; EBR de los Neutrones Rapidos de 14 MeV y de los Rayos Gamma del {sup 60}Co en el Trigo Escanda Menor

Abstract

The author investigated the RBE of 14 MeV neutrons to Co{sup 60} gamma-rays by using the specific locus method in Einkorn wheat. F{sub 1} seeds from the cross between the original strain and a chlorina mutant were used in this study (chlorina mutant was obtained as a single recessive mutant from X-irradiation; it was uniformly light green from seedling stage to maturity with relatively high survival rate and fertility). The F{sub 1} plants showed normal green colour and normal growth habit. Dormant F{sub 1} seeds were irradiated at 0.5 , 1.0 and 1.4 krad of fast neutrons ami 4.3 , 8.6 and 12.9 krad of gamma-rays. Mutations from dominant normal green to chlorina occurred by both irradiations and appeared in the leaves and stems of the heterozygotic Xi plants as longitudinal stripes. Around 80% of seeds germinated in the control lot and in the lowest dosage lots from both neutron and gamma-ray irradiations, and germination percentages were gradually decreased with increasing dosage of both kinds of radiation. Moreover, a similar tendency was observed at the early stage as to seedling growth which was gradually inhibited with increasing dosage. According to these results, neutron irradiation was about 13 times more effective  More>>
Authors:
Fujii, T. [1] 
  1. National Institute of Genetics, Misima (Japan)
Publication Date:
May 15, 1964
Product Type:
Conference
Report Number:
IAEA-SM-44/4
Resource Relation:
Conference: Symposium on Biological Effects of Neutron Irradiations, Upton, NY (United States), 7-11 Dec 1963; Other Information: 25 refs., 3 figs., 5 tabs.; Related Information: In: Biological Effects of Neutron and Proton Irradiations. Vol. II. Proceedings of the Symposium on Biological Effects of Neutron Irradiations| 460 p.
Subject:
63 RADIATION, THERMAL, AND OTHER ENVIRONMENTAL POLLUTANT EFFECTS ON LIVING ORGANISMS AND BIOLOGICAL MATERIALS; COBALT 60; FAST NEUTRONS; FERTILITY; GAMMA RADIATION; GERMINATION; IRRADIATION; LEAVES; MEV RANGE 10-100; MUTANTS; RBE; SEEDLINGS; SEEDS; SOMATIC MUTATIONS; STRAINS; WHEAT
OSTI ID:
22141865
Research Organizations:
International Atomic Energy Agency, Vienna (Austria)
Country of Origin:
IAEA
Language:
English
Other Identifying Numbers:
Other: ISSN 0074-1884; TRN: XA13M3467096466
Submitting Site:
INIS
Size:
page(s) 217-230
Announcement Date:
Oct 24, 2013

Citation Formats

Fujii, T. Relative Biological Effectiveness of 14-MeV Fast Neutrons to Co{sup 60} Gamma-Rays in Einkorn Wheat; Efficacite Biologique Relative des Neutrons Rapides de 14 MeV par Rapport aux Rayons Gamma de {sup 60}Co sur l'Engrain; Otnositel'naya biologicheskaya ehffektivnost' bystrykh nejtronov s ehnergiej 14 MeV i gamma-luchej CO{sup 60} pri ikh dejstvii na pshenitsu odnozernyanku; EBR de los Neutrones Rapidos de 14 MeV y de los Rayos Gamma del {sup 60}Co en el Trigo Escanda Menor. IAEA: N. p., 1964. Web.
Fujii, T. Relative Biological Effectiveness of 14-MeV Fast Neutrons to Co{sup 60} Gamma-Rays in Einkorn Wheat; Efficacite Biologique Relative des Neutrons Rapides de 14 MeV par Rapport aux Rayons Gamma de {sup 60}Co sur l'Engrain; Otnositel'naya biologicheskaya ehffektivnost' bystrykh nejtronov s ehnergiej 14 MeV i gamma-luchej CO{sup 60} pri ikh dejstvii na pshenitsu odnozernyanku; EBR de los Neutrones Rapidos de 14 MeV y de los Rayos Gamma del {sup 60}Co en el Trigo Escanda Menor. IAEA.
Fujii, T. 1964. "Relative Biological Effectiveness of 14-MeV Fast Neutrons to Co{sup 60} Gamma-Rays in Einkorn Wheat; Efficacite Biologique Relative des Neutrons Rapides de 14 MeV par Rapport aux Rayons Gamma de {sup 60}Co sur l'Engrain; Otnositel'naya biologicheskaya ehffektivnost' bystrykh nejtronov s ehnergiej 14 MeV i gamma-luchej CO{sup 60} pri ikh dejstvii na pshenitsu odnozernyanku; EBR de los Neutrones Rapidos de 14 MeV y de los Rayos Gamma del {sup 60}Co en el Trigo Escanda Menor." IAEA.
@misc{etde_22141865,
title = {Relative Biological Effectiveness of 14-MeV Fast Neutrons to Co{sup 60} Gamma-Rays in Einkorn Wheat; Efficacite Biologique Relative des Neutrons Rapides de 14 MeV par Rapport aux Rayons Gamma de {sup 60}Co sur l'Engrain; Otnositel'naya biologicheskaya ehffektivnost' bystrykh nejtronov s ehnergiej 14 MeV i gamma-luchej CO{sup 60} pri ikh dejstvii na pshenitsu odnozernyanku; EBR de los Neutrones Rapidos de 14 MeV y de los Rayos Gamma del {sup 60}Co en el Trigo Escanda Menor}
author = {Fujii, T.}
abstractNote = {The author investigated the RBE of 14 MeV neutrons to Co{sup 60} gamma-rays by using the specific locus method in Einkorn wheat. F{sub 1} seeds from the cross between the original strain and a chlorina mutant were used in this study (chlorina mutant was obtained as a single recessive mutant from X-irradiation; it was uniformly light green from seedling stage to maturity with relatively high survival rate and fertility). The F{sub 1} plants showed normal green colour and normal growth habit. Dormant F{sub 1} seeds were irradiated at 0.5 , 1.0 and 1.4 krad of fast neutrons ami 4.3 , 8.6 and 12.9 krad of gamma-rays. Mutations from dominant normal green to chlorina occurred by both irradiations and appeared in the leaves and stems of the heterozygotic Xi plants as longitudinal stripes. Around 80% of seeds germinated in the control lot and in the lowest dosage lots from both neutron and gamma-ray irradiations, and germination percentages were gradually decreased with increasing dosage of both kinds of radiation. Moreover, a similar tendency was observed at the early stage as to seedling growth which was gradually inhibited with increasing dosage. According to these results, neutron irradiation was about 13 times more effective than that of gamma-rays. Survival rate in the non-irradiated control was about 90% and about 60-80% of germinated seedlings survived in 0.5 and 1.0 krad lots from neutron irradiation and all lots irradiated by gamma-rays. On the other hand, only about 4% of germinated seedlings survived in the highest neutron lot. No mutation was observed in the control lot, and the number of plants which contained striped tillers increased with increasing dosage of both kinds of radiation. Mutated tillers were observed in about 15% of surviving plants obtained at the lowest dosage of neutron irradiation and a similar frequency was observed from the highest dosage of gamma-rays. RBE of 14 MeV neutrons to Co{sup 60} gamma-rays seemed to be at least 20 for the somatic mutation. (author) [French] L' auteur a etudie l'EBR des neutrons de 14 MeV par rapport aux rayons gamma de {sup 60}Co en appliquant a l'engrain la methode des loci specifiques. Il a utilise pour cette etude des semences Fi resultant du croisement entre l'espece originale et un mutant chlorina (le mutant chlorina e ta it le produit d'une mutation recessive induite par les rayons X ; depuis le stade de plantule jusqu'a sa maturite, le m utant a conserve une couleur vert c la ir uniforme ainsi qu'un taux de survie et une fe rtilite relativement eleves). Les plantes Fi avaient une couleur verte et une croissance normales. Des semences dormantes de F{sub 1} ont e te irradiees avec 0,5 , 1,0 et 1,4 krad de neutrons rapides et avec 4,3 , 8,6 et 12,9 krad de rayons gamma. Sous l'effet des deux types de rayonnements, il s'est produit des mutations de vert normal dominant en chlorina, sous forme de bandes longitudinales. Sur les feuilles et les tiges des heterozygotes X{sub 1}. Environ 80% des semences ont germe dans le lot temoin ainsi que dans les deux lots ayant recu la plus faible dose de neutrons et de rayons gamma; les taux de germination ont diminue a mesure qu'augmentaient les doses de neutrons et de rayons gamma. En outre, on a observe un phenomene analogue au debut de lacroissance de la plantule, qui etait progressivement inhibee a mesure qu'augmentait la dose de rayonnement. Les resultats obtenus montrent que l'irradiation par les neutrons est environ 13 fois plus efficace que celle par les rayons gamma. Le taux de survie des semences non irradiees du lo t temoin a e te de 90% environ; 60 a 80% des plantules ont survecu aux doses de 0,5 et 1,0 krad de neutrons; toutes les plantilles irradiees par les rayons gamma ont survecu. En revanche, 4% seulement des plantules ont survecu a 1,4 krad de neutrons. L'auteur n 'a pas observe de mutations chez les plantes du lo t temoin; le nombre des plantes a talles rayees a augmente en meme temps que les doses des deux types de rayonnements. E a observe des talles mutants dans pres de 15% des plantes qui ont survecu a la plus faible dose de neutrons et a constate que la frequence e ta it la meme pour les plantes qui avaient recu la dose la plus elevee des rayons gamma. L'EBR des neutrons de 14 MeV par rapport aux rayons gamma de {sup 60}Co semble etre d'au moins 20 pour la mutation somatique. (author) [Spanish] El autor estudio la EBR de los neutrones de 14 MeV con respecto a los rayos gamma del {sup 60}Co por el metodo del locus especifico en el trigo escanda menor. Empleo semillas Fi obtenidas por cruza entre la cepa original y el mutante chlorina (este ultimo se obtuvo como mutante recesivo unico por exposicion a los rayos X; conserva un color verde palido desde que germina hasta que alcanza la madurez, con indices de supervivencia y fertilidad relativamente elevados). Las plantas Fj presentan el color verde normal y tambien es normal la modalidad de desarrollo. El autor irradio las semillas de Fx latentes con neutrones rapidos (en dosis de 0,5 - 1,0 y 1,4 krad) y con rayos gamma (4 ,3 - 8,6 y 12,9 krad). Ambas radiaciones provocaron mutaciones del verde normal dominante al tono chlorina, que aparecio en las hojas y tallos de las plantas heterocigoticas en forma de rayas longitudinales. Alrededor del 80% de las semillas germino en el grupo testigo y en los grupos expuestos a los neutrones y rayos gamma en dosis bajas, pero el porcentaje de semillas germinadas fue decreciendo gradualmente a medida que aumentaba la dosis de ambos tipos de radiacion. Ademas, se observo una tendencia similar en la primera fase d el desarrollo de la plantula, que se inhibe paulatinamente al aumentar la dosis. De acuerdo con estos resultados, la irradiacion neutronica Inverted-Question-Mark s unas 13 veces mas eficaz que los rayos gamma. El in d ic e de supervivencia en el grupo testigo, no irradiado, fue del orden de 90%; en los grupos expuestos a los neutrones a razon de dosis de 0,5 y 1,0 krad, sobrevivio entre 60 y 80% de las plantulas y en los grupos tratados con rayos gamma, la supervivencia fue del 100%. En cambio, en el grupo sometido a la irradiacion neutronica con la dosis mas elevada, solo sobrevivio un 4% de las plantulas. No se observaron mutaciones en el grupo testigo y el numero de plantas que presentaba retonos rayados crecio al aumentar la dosis de ambos tipos de radiacion. Se observaron retoflos con mutaciones en un 15% de las plantas sobrevivientes tratadas con la dosis inferior de neutrones y la misma frecuencia se registro para la dceis mayor de rayos gamma. Al parecer, la EBR de los neutrones de 14 MeV con respecto a los rayos gamma de {sup 60}Co, para la mutacion somatica, es 20 como minimo. (author) [Russian] Avtor izuchal OBJe nejtronov s jenergiej 14 Mjev i gamma-luchej Sobo pri ih dejstvii na pshenicu odnozernjanku s pomoshh'ju special'nogo lokusnogo metoda. Dlja opyta ispol'zovalis' semena generacii F{sub 1} gibrida mezhdu ishodnym sortom i mutantom Chlorina (mutant Chlorina byl poluchen kak edinstvennyj recessivnyj rentgenomutant; ot stadii sejanca do nastuplenija spelosti on byl odnorodno svetlozelenym s otnositel'no vysokoj vyzhivaemost'ju i urozhajnost'ju). U rastenij F{sub 1} byla normal'naja zelenaja okraska i normal'nyj harakter rosta. Pokojashhiesja semena Ft obluchali bystrymi nejtronami v dozah 0,5, 1,0 i 1,4 krad i gamma-luchami v dozah 4,3 8,6 i 12,9 krad. Mutacii ot dominantnyh normal'nyh zelenyh do Chlorina nabljudalis' posle oboih vidov obluchenija i pojavljalis' v list'jah i stebljah geterozigotnyh rastenij X{sub 1} v vide prodol'nyh polos. Okolo 80% semjan vzoshlo na kontrol'nyh uchastkah i na uchastkah posle obluchenija ca- mymi nizkimi dozami nejtronov i gamma-luchej, procent vshozhesti postepenno snizhalsja s povysheniem dozy pri oboih vidah obluchenija. Krome togo, takaja zhe tendencija nabljudalas' i na rannih stadijah rosta sejancev, kotoryj postepenno tormozilsja s povysheniem dozy. Soglasno jetim dannym nejtronnoe obluchenie okazalos' pochti v 13 raz jeffektivnee gamma- luchej. Vyzhivaemost' neobluchennyh kontrol'nyh rastenij byla okolo 90%, a u prorosshih semjan na uchastkah posle obluchenija 0,5 i 1,0 krad nejtronov, i na vseh uchastkah posle gamma- obluchenija vyzhivaemost' sostavljala 60-80%. I, naprotiv, lish' okolo 4% prorosshih semjan vyzhili na uchastkah posle obluchenija samymi vysokimi dozami nejtronov. Na kontrol'nom uchastke mutacij ne obnaruzheno, a chislo rastenij s polosatymi pobegami vozrastalo s povysheniem dozy pri oboih bilah obluchenija. Mutantnye pobegi nabljudalis' primerno u 15% vyzhivshih rastenij, poluchivshih samye nizkie dozy nejtronnogo obluchenija, i u takogo zhe kolichestva rastenij, poluchivshih samye vysokie dozy gamma-obluchenija. OBJe nejtronov s jenergiej 14 Mjev po sravneniju s gamma-luchami Cot; v otnoshenii somaticheskih mutacij ravnjalos' po krajnej mere 20. (author)}
place = {IAEA}
year = {1964}
month = {May}
}