Abstract
Gynogenetic diploid induced by retaining second polar body and that by suppressing first cleavage of eggs of Indonesian common carp Cyprinus carpio were produced by inseminating eggs with ultra-violet ray irradiated sperm of Java carp Puntius gonionotus and giving heat shock treatment to the developing eggs. The morphometric and meristic characters of 3 month old fish were measured and counted. There was the prominent trend that the degree of phenotypic variation was larger in the mitotic- and meiotic-gynogenetic diploids than in the control-2N in the almost all morphological characters examined. These phenomena observed in variation of quantitative characters were explained by the function showing the relationship among phenotypic variance (Vp), genetic variance (Vq), environmental variance (Ve) and coefficient of inbreeding (F) in the first gynogenetic generation. The genetic implications for gynogenetic diploids were discussed in relation to genetic improvement of fish race in aquaculture.
