Abstract: Since 60′s in 20 century,the cross breeding works of millet were developed in china,the result of the research on the genetic foundation of millet varieties in Boreali-sinica summer millets region showed that the backbone parents of millet breeding came through the change course of "Xinnong 724 to Japan 60 Day,Yugu No.1,Jigu No.6,Lugu No.2,Lugu No.5 to Japan 60 Day,Yugu No.1,Jigu No.6,Lugu No.2,Bu 5019".The more research on the above parents showed that the genetic foundation mostly root in the four base germplasms that Japan 60 Day,60 Day Huancang,Mihuanggu and Xiaoliugen before the 21 century.The genetic foundation was quite narrow,especially 90′s in 20 century later,the genetic foundation of breeded varieties was more and more narrow.The 70 percent of the tested varieties had the kin of "Japan 60 Day"in the National Region Experimentation and Hebei Province Region Experimentation from 1994 to 2003,sometimes the ratio was 100 percent in serious age,above 40 percent double parents had the consanguinity of "Japan 60 Day",sometimes was 75 percent in serious age,resulted in the brittle resistance of millet variety,it is difficulty to break through in the yield and quality,the breeding works locat in the uphill PHA_Se for a long time.The main reason is that simple breeding means and centralized utilizing of the minor parents.The settling approach is that strength the research on germplasms and far-ranging collect the germplasms,innovate the parents and methods,explore the advanced new type millet breeding methods.

Key words: Millet variety, Genetic foundation, Pedigree

CLC Number: 

• S515.01