Fox J (2005) The R commander: a basic statistics graphical user interface to R. Journal of Statistical Software 14: 1–44.
Horne BD and Camp NJ (2004) Principal component analysis for selection of optimal SNP-sets that capture intragenic genetic variation. Genetic Epidimiology 26: 11–21.
Labate JA, Sheffer SM, Balch T and Robertson LD (2011) Diversity and population structure in a geographic sample of tomato accessions. Crop Science. .
Lin Z and Altman RB (2004) Finding haplotype tagging SNPs by use of principal components analysis. American Journal of Human Genetics 75: 850–861.
Peakall R and Smouse PE (2006) GENALEX 6: genetic analysis in Excel. Population genetic software for teaching and research. Molecular Ecology Notes 6: 288–295.
Pearson WR and Lipman DJ (1988) Improved tools for biological sequence comparison. Proceedings of the National Academic Sciences USA 85: 2444–2448.
R Development Core Team (2011) A Language and Environment for Statistical Computing. Vienna, Austria. R Foundation for Statistical Computing. http://www.R-project.org.
Rohlf FJ (2002) NTSYSpc: Numerical Taxonomy System, Version 2.1. Setauket, NY: Exeter Publishing, Ltd.
Stajich JE, Block D, Boulez K, Brenner SE, Chervitz SA, Dagdigian C, Fuellen G, Gilbert JG, Korf I, Lapp H, Lehväslaiho H, Matsalla C, Mungall CJ, Osborne BI, Pocock MR, Schattner P, Senger M, Stein LD, Stupka E, Wilkinson MD and Birney E (2002) The Bioperl toolkit: Perl modules for the life sciences. Genome Research 12: 1611–1618.