Abstract:

The nutritional compositions， amino acid and fatty acid compositions and contents, mineral material content, the total sugar and the reducing sugar contents of the foot muscle of H.discus hannai， H.iris and their hybrids were analyzed by using biochemical methods. The results showed that the hybrids contained the rishest protein(17.97%), H.iris contained the rishest fat(1%) and sugar (9.29%). The total amino acid content(58.91%) and the deliocious amino acid content(28.77%)of the hybrids were highest, the essential amino acid content of H.iris was highest (21.33%), the contents of them in H.discus hannai foot muscle were least. The composition of fatty acids and the content the unsaturated fatty acids of in H.iris and the hybrids body were higher than H.discus hannai． In the nine testing mineral material, except the content of Mn and Cu was highest in the foot muscle of H.iris obviously, while the content of the other seven kinds of element in their foot muscles showed little differences. The total sugar and the reducing sugar contents of H.iris were the highest, and the contents of them in H.discus hannai body were the least. Based on these findings， some inherited defective qualities of the next generation can be improved by interspecific hybridization， the hybrids have some qualities that are superior to their parents and indicated heterosis.

Key words: Haliotis discus hannai, Haliotis iris, nutritional composition, hybridation