文献里用的是TD-PCR,程序是这样说的“10 cycles of 94° for 15s,60 to 51° for 30s,72°for 2min。Followed by 25 cycles of 94° 15s,55°for 30 to 54s and 72° for 2min and final extension of 72° 7min”,如果我没理解错的话这句话的意思是前10个循环退火温度从60逐渐降到51,每个循环降1°,后25个循环退火温度为55°,但时间从30s逐渐增加到54s,每循环增加1s。