Studies on the Restoring Abilities of Different Wide Compatibility Varieties to the Male Sterile Lines with Different Cytoplasms in Rice The Transfer of Genetic Ma le Ster ile L ines in B rassica cam pestris L. ssp.ch inensis (L. ) Makino The Transfer of Genetic Ma le Ster ile L ines in B rassica cam pestris L. ssp.ch inensis (L. ) Makino Breeding and Utilization of the Genetic Male Sterile Line in Purple Stalk Chinese Cabbage Breeding and Utilization of the Genetic Male Sterile Line in Purple Stalk Chinese Cabbage