Abstract:

With the new technology of abalone gonad development control and temperature reversion control for the fertilization,the gametic hybridization breeding between H.discus hannai and H.iris were studied. The results showed that the fertilization rate and larval hatching rate of hybridized breeding between H.discus hannai ♀ and H.iris♂ were 23.4％ and 32.87％ respectively, while the fertilization rate and larval hatching rate of H.dis cus hannai autocopution were 77.97％ and 76.86％ respectively, the attachment rate and the metamorphosis rate between H.discus hannai and the hybridized abalone were similiar. The procedure of embryo development of hybrids was lagged than pure progenies when the temperature was at 20℃ and salinity was 30, but the growth rate of the juvenile hybridized abalone was significantly higher than H.discus hannai. F1generation of the hybridization indicated better production performance and heterosis.

Key words: Haliotis discus hannai; Haliotis iris; hybridization