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- W2069673197 abstract "Neonatal guppies of a wild-coloured inbred strain were X-irradiated with 1000 R, corresponding to early oogonia and spermatogonia. At sexual maturity the irradiated fish and their sham-treated controls were mated to unirradiated guppies of another stock. The proportions of the body shape and the number of vertebrae of the F 1 and F 2 generations were determined. The quantitative characters controlled by polygenes in both experimental and control groups showed that the number of vertebrae increased in the F 1 and decreased in the F 2 . The changes in body proportions reveal a trend towards a more compact type after ancestral irradiation. The variability coefficient was greater among females of the irradiated series. Shifts in the mean values were combined with alterations of viability revealing an increase in postnatal mortality and a reduction of litter size in the backcross generation. An increase in litter size and a decrease in postnatal mortality appeared in the F 1 and F 2 generations where radiation-induced detrimental mutations were less likely to become homozygous." @default.
- W2069673197 created "2016-06-24" @default.
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- W2069673197 date "1969-12-01" @default.
- W2069673197 modified "2023-09-25" @default.
- W2069673197 title "QUANTITATIVE CHANGES IN BREEDING GROUPS OF LEBISTES AFTER IRRADIATION" @default.
- W2069673197 cites W2002567244 @default.
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- W2069673197 doi "https://doi.org/10.1139/g69-111" @default.
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