Modification of Radiation Damage in Dormant Seeds by Storage

Radiation‐Induced Mutations for Stem Rust Resistance in Oats1

“…#354 which carries genes AB and D governing resistance to all known oat rust races. (5) CI 7144 which carries the gene combination AD and is resistant to all races except 4, 6, and 13. (6) Clinton x Ark.…”

Relation of Radiation Effects to Dose Rates of Gamma- Or X-Radiation in Rice and Wheat

“…On the other hand, Caldecott (unpublished) and also Frey (unpublished) indicated in 1955 that they were unable to observe any storage effect on seeds (Curtis et al 1958). …”

“…An extensive work was undertaken by Curtis et al (1958) to confirm or deny the reported storage effect on seeds, and if it were confirmed, to determine the factors responsible for the extent and duration of the effect. The results showed that there RELATION OF RADIATION EFFECTS TO DOSE RATES OF GAMMA-OR X-RADIATION 129 may be either a very large storage effect or almost none at all, depending on a number of factors.…”

Gibberellic Acid Protection against EMS and MMS Induced Damage to Chromosomes in <i>Pisum sativum</i> L

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Chromosomal aberrations produced by physical and chemical mutagens are the main causes of damage in mutation studies However, recent experiments have amply revealed that a great many factors modify the chromosomal damage by affecting the biological changes induced by physical and chemical mutagens (Curtis et al, 1958, Nilan et al, 1961and Konzak et al, 1965. Hormones, e.g., indole acetic acid, along with other chemicals have been found to modify the mutagenic damage only to the extent that they influence the growth pattern in plants (Guttman and Brown 1959, Gaur and Notani 1963and Arartjan 1967.

The present experiments relate to cytological changes observed in ethyl methane sulphonate (EMS) and methyl methane sulphonate (MMS) treated peas during M,, M2 and M3 generations.

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