Genetic Study on Transfer of Desirable Cytogene of Wild Soybean

Using wild soybean is one of the important ways to widen the genetic basis and improve the productivity of cultivated soybean.The new soybean strains of high yield,high protein content and resistance to soybean mosaic virus with the cytoplasm of wild soybean have been bred by obtaining the hybrid progeny from wild soybean×cultivated soybean,then backcrossing between the interspecific hybrid progeny and cultivated soybean,which may be used as the parents to improve soybean.By analyzing the DNA of excellent soybean strains and their parents,it is made clear that backcross should be carried out in early generation so as to retain more genetic basis of wild soybean.The yield traits of four hybridized and reverse hybridized combinations of wild soybean×cultivated soybean are compared.Using wild soybean as female parent to widen the genetic basis is not only feasible,but also has no undesired characters,and is benefit to increase the yield component.