基金Supported by the Chinese Academy of Sciences （Grant Nos. KSCX2-SW-121 and GJHZ0518）, the National Natural Science Foundation of China （Grant Nos. 30370755, 30440018, 30525028, 90208019, 90403130 and 30221004）, the National 973 Project of China （Grant No. 2006CB701506）, the Post-doctoral Fellowship of China （Grant No. 2005038271）, Ministry of Science and Technology under program （Grant No. CNGI-04-15-7A）, the Natural Science Foundation of Yunnan Province of China, China National Grid, and Danish Platform for Integrative Biology and 0le Remer grants from the Danish Natural Science Research Council.The authors thank Fan XiaoNa and Yu YiChuan for technical assistance.