Seeds Phenotypes Characterization of Promising Tungro-Resistant Rice Lines

Abstract

Breeding activities to produce a new site-specific rice varieties resistant to tungro require of suitable genetic materials as cross-breeding materials. This research aims to determine the seed phenotypic characters of promising tungro resistant rice lines and their similarity. The research was conducted using a completely randomized design with treatment of 42 promising tungro-resistant rice lines, 1 resistant rice variety (Inpari 7) and 1 susceptible rice variety (TN1), that each of which was repeated 3 times. The characters were observed included of quantitative and qualitative characters. Observation of seed characters was carried out based on the standard system of characterization and evaluation of rice plants. The similarity of seed characters was analyzed by using the NTSYS pc version 2.1 program and displayed in the form of a dendrogram. The results showed that most of the tested lines had the same quantitative characters as the Inpari 7 variety. The value of variability of diversity was included in the broad category of >4, with the lowest similarity coefficient of 63% and the highest of 94%. The similarity analysis based on the seed characters resulted in 2 large groups consisting of 41 lines belonging to the Inpari 7 group and 1 line belonging to the TN1 group. The lines that were incorporated in the Inpari 7 group were further divided into two subgroups of 39 and 2 lines, respectively. The results of this research are preliminary data to obtain an information of the relationship between seed characters and tungro resistance properties.