Persian sturgeon (Acipenser persicus) is one of the most valuable fish species native to the Caspian Sea and Iran's waters. This study was designed to estimate heritability of Persian sturgeon eggs and larval hatching. Six fish were caught from the southern Caspian Sea and transferred to “Shahid Beheshti Propagation Complex” during 2016. Cross breeding was carried out using a 3×3 factorial plan. The result of mating among them was 9 treatments. For heritability estimates, the total weight, eggs size (No 405), overall weight and total length of 135 pieces of newly hatched Persian sturgeon larvae were examined. Features including weight and size of larvae and eggs at blastula, gastrula and neurola stages were evaluated. Weight and length of larvae were measured. Variance components were estimated using software R linear mixed model (LMM) closed Lme 4.Weights at blastula, gastrula and neurola stages were 0.218±0.124, 0.033±0.01 and 0 respectively. At these stages, heritability of egg size showed 0.375±0.145, 0 and 0 respectively. The heritability of weight and total length of larvae recorded, were 0.231±0.122, 0.161±0.042 respectively. The result of additive genetic value prediction identified female3 and male3as the best breeders in the broodstok. The phenotypic correlations between eggs weight and size at blastula, gastrula and neurola stages were 0.106, 0.44 and 0.43 respectively. However, weight and length correlation of larvae was 0.435. The estimated heritability for these traits supports it’s suitability as a selection tool in aquaculture.
کلید واژگان :Acipenser persicus, Heritability, egg, larvae, Genetic value
ارزش ریالی : 600000 ریال
با پرداخت الکترونیک