Induced androgenesis in acipenserids may be obtained by ultraviolet radiation

Resumo

The results are presented on haploid androgenesis in Siberian sturgeon and sterlet induced by UV irradiation of ovicells. During irradiation, the cells in Ringer solution were rotated around a UV lamp. The efficiency of genetic inactivation of ovicells was estimated by the following parameters: manifestation of Hertwig effect, the fraction of embryos demonstrating haploid syndrome at final developmental stages, by arrest of embryonic development in hybrids Siberian sturgeon × great sturgeon, and by absence of maternal alleles of microsatellite loci in embryos. The dose-effect curve suggests that, during UV irradiation of ovicells of Siberian sturgeon, the complete genetic inactivation is attained at exposition of 120 s, while that in sterlet is 90 or 105 s. The results show a principal possibility of inactivation of ovicells by UV irradiation and use of such cells for producing androgenetic progeny of acipenserids.