Local Rice Genotypes of Tana Toraja and North Toraja Regencies: Kinship Relations and Character Interaction

Tree, The Regency of Tana Toraja and North Toraja, are two regencies in the Province of South Sulawesi where even though both are not the center of rice crop development, but in both regencies we can find many cultivated local rice genotypes. This study aims to determine the relationship between local rice genotypes found in the two regencies based on panicle and grain characteristics and the correlation between these characters. The characters observed are panicle length, grains number per panicle, panicle density, awn length, grain length, grain width, grain thickness, grain length to width ratio and 100 seeds weight. Results showed that 49 local rice genotypes were found (27 local rice genotypes from Tana Toraja regency and 22 local rice genotypes from North Toraja regency) with various rice colors, i.e. from white to purple. These local rice genotypes can be grouped into three groups with a similarity rate of 67.56%, namely group I consists of 41 local rice genotypes, group II consists of 3 local rice genotypes (all local rice genotypes from Tana Toraja regency) and group III consists of 5 local rice genotypes and these characters can be grouped into two groups with a similarity rate 48.71%, namely group I consists of two characters (panicle length and grains number per panicle) and groups II consists of 7 characters (panicle density, awn length, grain length, grain width, grain thickness, grain length to width ratio and 100 seeds weight). There was a very significant positive correlation between the characters, namely panicle length and grains number per panicle, panicle length and panicle density, panicle length and awn length, grains number per panicle and panicle density, awn length and grain width, grain length and grain length to width ratio, grain length and 100 seeds weight, grain thickness and 100 seeds weight and grain length to width ratio and 100 seeds weight, with the correlation coefficient values 0.630**, 0.406**, 0.470**, 0.960**, 0.428**, 0.821**, 0.609**, 0.591** and 0.365**, respectively and there was also a very significant negative correlation between the characters, namely awn length and grain length to width ratio and grain width and grain length to width ratio, with the correlation coefficient values -0.401 ** and -0.770 **.