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8Smith J. S.C. and Register Ⅲ J.C. Genetic purity and testing technologies for seed quality: a company perspective [J]. Seed Science Research, 1998, 8: 285-293.
9Powell W, Marchray G C, and Provan J. Polymorphism revealed by simple sequence repeats [J]. Trends in Plant Science,1996. 1: 215-222.
10Smith J S C, Chin E C L, Shu H, et al. An evaluation of the utility of SSR loci as molecular markers in maize (Zea rnays L. ):comparisons with data from RFLPs and pedigrees [J]. UPOV working group on biochemical and molecular technique and DNA profiling in particular fourth session, Cambridge UK March 11 to 13, 1997.