Comparison of similarity coefficients in sesame cultivars clustering using RAPD markers
Nair Helena Castro Arriel, Antônio Orlando Di Mauro, Cosme Damião Cruz, Sônia Marli Zingaretti Di Mauro, Marcelo Marchi Costa, Sandra Helena Unéda-Trevisoli and Andréa Capeloto
Abstract: Thirteen similarity coefficients were evaluated by the UPGMA method for clustering ofnine sesame cultivars based on 613 RAPD markers. Distance matrices were estimated from the arithmetic complement of the Simple Matching, Jaccard, Kulczynski2, Indexlll, Ochiai, Ochiaill, Rogers and Tanimoto, Russel and Rao, Sorensen-Nei and Li, Baroni- Urbani and Buser, Sokal and Sneath, Haman and Phi coefficients. They all identified the same pairs of most divergent and most similar cultivars (2 and 7, 3 and 4, respectively). Except for the Russel and Rao’s, the UPGMA dendrograms formed three identical groups. Based on the nature of the RAPD markers and the mathematical properties of Jaccard, Kulczynski2, Ochiai and Sorensen-Nei and Li coefficients, it is concluded that these coefficients are the most suitable for clustering sesame cultivars.