Abstract: By means of horizontal starch gel electrophoresis,eight isozymes (LDH,EST,MDH,IDH,SOD,ME,G-6-PDH,ADH)in muscle,liver,eye,heart of Erythroculter ilishaeformis Bleeker were srudied,The genee expression patterns of evevy isozyme were analyzed.Amony 20 loci screened only I locus(Est-2)of EST was polymorphic.The percentage of polymorphic loci and average heterozygosity of Erythroculter ilishaeformis Bleeker in Xingkai Lake was 0.0500 and 0.0139 respectively.Compared with other bony fishes of Cyprinidae,The genetic variation of Erythroculter ilishaeformis Bleeker in Xingkai Lake at protein level is poor.

Key words: Xingkai Lake, Erythroculter ilishaeformis Bleeker, isozyme, polymorphic, electrophoresis