Project supported by the National Basic Research Program of China(No.2009CB119000);the Genetically Modified Organisms Breeding Major Projects(No.2009ZX08009-044B);the Program for New Century Excellent Talents in University(No.NCET-08-0485);the Program for New Century 151Talents of Zhejiang Province;the National Natural Science Foundation of China(No.30871608and 30771406)