ISSR and SRAP for assessing genetic variability of Indonesian local rice genotypes (Oryza sativa L.)

Abstract

This study evaluated the genetic variability of 34 local rice genotypes from Simeulue Island and Sumba Island, Indonesia, using ISSR and SRAP markers. The amplification of ISSR and SRAP primers produced high percentages of polymorphism, with values of 98.17% and 99.75%, respectively. The result of the UPGMA dendrogram analysis classified the rice genotypes into three groups by ISSR and two groups by SRAP. The ISSR had a higher Resolving Power (RP = 14.66) and Marker Index (MI = 4.61) than the SRAP (RP = 9.13, MI = 3.8). However, the results of the UPGMA dendrogram corresponded to the STRUCTURAL data analysis. The ΔK of STRUCTURAL analysis performed its maximum value when K = 3 by ISSR and K = 2 by SRAP. This study pointed out that ISSR markers were more effective than SRAP markers in evaluating the degree of genetic variability of rice genotypes.