Induced Artificial Androgenesis in Common Tench, Tinca Tinca (L.), Using Common Carp and Common Bream Eggs

Abstract

This study presents artificial induction using tench eggs, Tinca tinca (L.), of androgenetic origin. The oocytes taken from common bream, Abramis brama (L.) and common carp, Cyprinus carpio L. were genetically inactivated using UV irradiation and then inseminated using tench spermatozoa. Androgenetic origin (haploid or diploid embryos) was checked using a recessive colour (blond) and morphological markers. The percentage of hatched embryos in all experimental groups was much lower than in the control groups. All haploid embryos showed morphological abnormalities, which were recorded as haploid syndrome (stunted body, poorly formed retina, etc.). The optimal dose of UV irradiation of common bream and common carp eggs was 3456 J m–2. At this dose, almost 100% of haploid embryos were produced at a hatching rate of over 6%. Lower UV-ray doses affected abnormal embryo development. The highest yield of tench androgenesis (about 2%) was noted when eggs were exposed to thermal shock 30 min after egg activation.