| Abstrak/Abstract |
AbstractThe genus Synedrella remains monotypic in spite of its wide range of distribution, in which S. nodiflora (L.) Gaertn has taxonomically been the only member of the genus so far. This leads to assumption of the very low genetic difference among S. nodiflora populations worldwide. It may also be the case in Java Island, though rapid changes in ecosystem condition occurs. Here we report our study on S. nodiflora population genetics in Java Island using intergenic spacer (IGS) atpB-rbcL as a molecular mar-ker, since it has been well known as one of the most variable chloroplast genome regions in a wide range of plant species so far. As many as 58 individuals were collected randomly from ten different locations in the island. Based on IGS atpB–rbcL sequences of 860 bp length, only two haplotypes were observed. Both show only one polymorphic site (0.12%) as well as low haplotype diversity (0.0345) and low nucleotide diversity (0.000040). In addition, the very low fixation index (FST = 0.02645; p = 1.00000) proves low genetic difference, or in other words, indicates high connectivity among populations of S. nodiflora in Java Island. At the same time provides a fact of nearly no variation among the IGS atpB – rbcL sequences. |
