Abstract: The seed protein extracts from 1,858 Chinese soybean cultivars wereanalyzed by polyacrylamide gel electrophoresis in order to determine thedistribution of the alleles of the Ti(Ti^a,Ti^b,and Ti^c)and Sp₁(Sp₁^b,Sp₁^a,and Sp₁^c)loci.About 99.5 percent of the soybean cultivars hadthe Ti^a allele.The Ti^b allele was discovered in ten cultivars.Only oneaccession was identified as having Ti^c.The Ti allele has not been disco-vered in soybean from China.The frequency for the Sp₁^b allele is about95.3 percent ...