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Genetic diversity of rice is important for rice breeding strategies. The objective of this study was to evaluate rice grain morphological characteristics, α-tocopherol, γ-oryzanol in 81 rice germplasms compared with KDML105 and RD6, by using multivariate analysis including statistical analysis, principal component analysis, and cluster analysis. The results indicated that rice germplasms were significantly different for all traits. A large variation among genotypes was found for rice grain morphological characteristics (7.72-30.99 %), α-tocopherol (49.82 %) and γ-ryzanol (23.3 9%). In addition, the principal component bi-plot and clustering analysis based on rice grain characteristics were clustered rice germplasms into 9 groups. According to clustering analysis based on lipid compounds contents, 83 rice germplasm were distinguished to 9 groups. The highest α-tocopherol and γ-oryzanol contents group comprised 14 genotypes including Sun-Pa-Thong, Nang-Boon-Ma, Khao-Saw-U-Don, Pah-Kheng, Chao-Pa-Thum-Ma, Rean-Thong, Luang-Boon-Ma, Khao-Haw, Hom-Saeng-Thong, Khao-Hom, E-Daeng, Khao-Chao-Ra-Tree, LG2751 and Hom-Thung 1. As the result, this study can be useful for the rice germplasm selection and breeding of rice varieties with high nutraceutical lipid compounds in the future.
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