Results 251 to 260 of about 4,733,094 (302)

Induced mutations and barley improvement

Theoretical and Applied Genetics, 1971
Seven barley varieties, originating from three X-ray induced mutations, have been officially approved in Sweden since 1958. Some have gained a wide area of cultivation. The list is as follows: Pallas, isolated 1947, approved 1958, mutant ert-k (32) of Bonus barley. - Mari, isolated 1950, approved 1960, mutant mat-a (8) of Bonus. - Hellas, approved 1967,
A, Gustafsson, A, Hagberg, G, Persson, K, Wiklund   +3 more
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Ultraviolet-induced mutation in Streptomyces induces

Mutation Research, 1969
Abstract The wild-type strain Streptomyces indicus Chakrabarty and 4 mutant strains derived from it were irradiated by UV rays of 253.7 nm wavelength at 100 erg/mm 2 /sec, for 20, 40, 60 and 80 sec. The survival curve was exponential, and the rate of mutation was parallel with the increasing dosage and was followed later by a decline.
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Experimental work on induced mutations

Philosophical Transactions of the Royal Society of London. B, Biological Sciences, 1988
Abstract The detection of changes in mutation rate in human populations remains extremely difficult. Thus estimation of genetic hazards of mutagens to man depends on extrapolation from experimental systems. Germ cells of animals show complex variations in sensitivity to mutagenic effects. Some agents predominantly affect stem cells or
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COEXISTENCE OF THE STRAINS INDUCED BY MUTATION

International Journal of Biomathematics, 2012
In this paper, we propose a two strain epidemic model with single host population. It is assumed that strain one can mutate into strain two. Also latent-stage progression age and mutation are incorporated into the model. Stability of equilibria (including the disease free equilibrium, dominant equilibria and the coexistence equilibrium) is ...
Qian, De-Liang, Li, Xue-Zhi, Ghosh, Mini
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INDUCED MUTATIONS IN PLANT BREEDING

Canadian Journal of Plant Science, 1975
not available
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Chemically induced mutations in mice

Mutation Research, 1966
Abstract Using the specific locus method, the ability of the chemical triethylenemelamine to induce gene mutations in mouse spermatogonial cells was tested and confirmed.
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Population genetics of induced mutations

Environmental and Molecular Mutagenesis, 1995
The contribution of induced mutations to the burden of genetic disease in the context of population genetics is considered. A clear distinction is made between the effects of genetic disease and mutational events. Much of the existing burden of genetic disease is a consequence of mutations that occurred in the past.
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Characterization of nickel-induced mutations

Science of The Total Environment, 1994
A Chinese hamster ovary cell line (designated AS52) has been used to test the mutagenicity of nickel compounds. This line lacks the endogenous gene for hypoxanthine phosphoribosyl transferase (HPRT) but contains an inserted bacterial gene coding for the enzyme guanine-hypoxanthine phosphoribosyl transferase (gpt) which is the targeted locus for ...
F E, Rossetto, J D, Turnbull, E, Nieboer
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Radiation-Induced Mutations in Mammals

Radiology, 1950
There are two particular questions about radiation-induced mutations in mammals which should be of interest to radiologists: (1) How likely are mutations to occur, as a function of dose? (2) How serious are their effects? Let us first remind ourselves of the main classes of mutations recognized by geneticists.
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Analysis of induced mutations in Aspergillus nidulans I. UV- and HNO2-induced mutations

Mutation Research, 1966
Abstract A method is described that permits the selective detection of forward and back mutations for a single cistron in Aspergillus nidulans . The method also permits an easy phenotypic distinction among true back mutants and suppressor mutations. The rate of spontaneous, UV- and HNO 2 -induced retromutations has been studied in 15 UV- and 14 HNO
C, Calvori, G, Murpurgo
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