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Temperature and the progeny sex-ratio in Sciara ocellaris (Diptera, Sciaridae) Genet. Mol. Biol.
Nigro,Rogério G.; Campos,Maria Cristina C.; Perondini,André Luiz P..
We found that the sex-ratio of an amphigenic strain of Sciara ocellaris varied widely from progenies with few males to progenies containing a larger proportion of males, with single-sex progenies being rare. The sex-ratio distributions were dependent on the temperature at which the stocks of flies were raised, with the sex-ratio distributions being symmetrical (i.e. about 50% males) at 18 °C and 20 °C while at the higher temperatures of 24 °C and 28 °C the distributions were skewed toward a high proportion of females with the mean proportion of males decreasing to about 30-37% per progeny. Temperature-shift experiments showed that high temperatures were effective only during the last stages of female pupal development plus a period after adult emergence,...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Sex determination; Chromosome elimination; Embryo; Insect.
Ano: 2007 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1415-47572007000100026
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