On the basis of observing interrelationship between the changes of exte- rior morphological character of loquat(Eriobotrya japonica Lindl.)young fruit with colour of the peels and their interior embryonic development processes,we easily sampled the materials,whose endosperm remained in the developmental stage of cellular shape,through reconizing exterior char- acter of young fruits.The endosperm callus has been induced from the endo- sperm,which was separated from embryo sac and only inoculated on the B_5 b...