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- W2111660140 abstract "SUMMARY The ability of hybrid dysgenesis P factors to survive and multiply under conditions of strong negative sterility selection was studied in mixed P and M laboratory cultures. Eight populations were initiated with varying proportions of P and M strains. Mixed populations and controls were maintained for seventeen generations at 27 °C, a temperature sufficiently high to induce maximum frequencies of sterility in dysgenic hybrids. The two components of dysgenesis, P factor activity and cytotype, were monitored every generation for the first ten generations and intermittently thereafter. With one exception, all the mixed populations evolved to the P type indicating that P factors can survive and multiply, despite low initial frequency and strong negative selection against dysgenic hybrids. However, the average level of P factor activity attained at equilibrium was considerably lower than that of the P strain control population maintained under the same conditions. It was also lower than the equilibrium level of P factor activity attained in a similar experiment carried out at a lower temperature, suggesting that selection favoured P factors with weak rather than strong sterility potential." @default.
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- W2111660140 date "1984-12-01" @default.
- W2111660140 modified "2023-10-18" @default.
- W2111660140 title "Hybrid dysgenesis inDrosophila melanogaster: the evolution of mixedPandMpopulations maintained at high temperature" @default.
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- W2111660140 doi "https://doi.org/10.1017/s0016672300026495" @default.
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