RFLPS OF CHLOROPLAST AND MITOCHONDRIAL-DNA IN WILD SOYBEAN, GLYCINE SOJA, GROWING IN CHINA

RFLPs of chloroplast (cp) and mitochondrial (mt) DNA have been used to characterize the cytoplasmic genome of wild soybean, Glycine soja, gr owing in China. We have found from the RFLPs of cpDNA and mtDNA that t he cytoplasmic genomes of most Chinese wild soybeans have a combinatio n of cpIII with mt-a or a combination of cpII with mt-b accompanied by mtIV or mtV according to our classification. CpII was not observed in combination with mt-a and cpIII was not observed in combination with mt-b. The regional distribution of these two types showed dines with o pposite directions. The Yangtze River Valley had the greatest diversit y in each of cp and two mt profiles detected in this study and the cyt oplasmic genome combining these three profiles showed the highest degr ee of polymorphism in this region. The Yangtze River Valley may be a c enter of cytoplasmic diversity of wild soybean and may contain various genetic resources of soybean.