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A Marker-Based Approach to Broadening the Genetic Base of Rice in the USA

Yunbi Xua, Henry Beachellb and Susan R. McCoucha,*

a Dep. of Plant Breeding, Cornell Univ., Ithaca, NY 14853-1901
b RiceTec, Inc., P.O. Box 1305, Alvin, TX 77512



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Fig. 1. A: Distribution of the number of alleles detected at 100 RFLP loci in the USA (filled rectangles; n = 125) and world (open rectangles; n = 111) collections; B: Distribution of the number of alleles detected at 60 SSR loci in the USA (filled rectangles; n = 125) and world (open rectangles; n = 111) collections; C: Distribution of PIC values estimated for the 100 RFLP loci in the U.S. and world collections; D: Distribution of PIC values estimated for the 60 SSR loci in the U.S. and world collections.

 


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Fig. 2. Comparison of selection methods based on SAF or random selection for identifying members of a core collection. A. Proportion of RFLP alleles detected in U.S. and world collections based on shared allele frequency (USA-SAF and World-SAF) or random selection (USA-RS and World-RS). B. Proportion of SSR alleles detected in the same collections based on shared allele frequency (USA-SAF and World-SAF) or random selection (USA-RS and World-RS).

 





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