3.The results showed that the characters of shattering habit,main stem lignification and anther size(normal-small) are controlled by single gene. The genes for achene colour(light red-light green) at the beginning stage,achene edge colour(red-green) at the beginning stage,the achene edge shape(round-cuspate),the obverse color of perianth(pink-white),are all probably inherited under dominant complementary effect.