Abstract: Microsatellite marker was used to analyze the differences of genetic diversity among three generations of Sichuan white gooses， which were protected in small group conservation. Meantime， Hardy\|Weinberg equilibrium test， genetic distance and similarity analysis among the three generations were conducted as well. The results indicated: the average polymorphism information content on selected seven microsatellite sites in the three generations were 04741， 04866， 04718; Means of expected heterozygosity were 05387， 05511， 05295， respectively. There were no significant differences in advantage alleles， polymorphic information content（PIC） and expected heterozygosity （He） among three generations. The minimum of genetic similarity in three generations was 09704， maximum of genetic distance was 00301. This indicated that there were a good reservation and no differentiations in genetic constitution in small group. But by the Hardy\|Weinberg equilibrium test， it showed that the genetic structure of the group was in an unbalanced state gradually.

Key words: Sichuan white goose, microsatellite markers, conservation, genetic diversity