Abstract: In order to explore the breeding process of Erlang Mountain chicken pullorum purifying effect, this study used whole blood glass plate agglutination method to detect lines SD02 and SD03 three generations chicken populations pullorum disease situation, and also for the production of each generation performance data for analysis. The results showed that after three generations of purifying elimination,SD02 and SD03 prevalence among generations were extremely significantly different (P<0.01). SD02 in the rate of prevalence of child health, breeding stage survival rate, egg stage survival rate was significantly negatively correlated（P<0.05）. SD03 in the prevalence of brooding survival was significantly negatively correlated（P<0.05）. These results suggested that SD02 and SD03 pullorum purifying effect in significantly and improved production performance of flocks, breeding process for the subsequent removal pullorum laid a theoretical foundation.

Key words:

chicken; pullorum; purifying effect