Potato is one of high economically horticultural plant. The increasing of national consumption of potato becomes a challenge for potato breeders. The success of breeding programs is depending on availability of genetic diversity. The aim of this research was to analyze the genetic diversity of fourteen accessions of potato by using SSR and STS markers. PCR analysis was scored as biner data and the collected data was analyzed using NTSYS and PowerMarker. The result showed that there were 63% polymorphic (12 markers) of total markers. As many as 60 alleles with the size of 200-500 bp were identified by a range of 2-9 alleles per locus. The polymorphism level was 0.59 (0.36-0.74). Result also showed the average of major allele frequency was 49.42% (35.71-63.64%). Nine markers which have polymorphism level more than 0.5 could be used to detect genetic diversity of potato. The average of genetic diversity index was 0.65. Cluster analysis showed that 14 accessions of potato were split in two groups (coefficient 0.70). The first groups consisted of Atlantik, GM 05, Granola Kembang Merbabu 17, and the second groups consist of Repita, Maglia, Medians, CIP397078.7, CIP392781.1, Margahayu, Granola, CIP394613.139, Amabile, and Tenggo. The information of genetic diversity of this germplasm could be used as a preliminary basis for choosing crossing parents in potato breeding in Indonesia.Keywords: Potato (Solanum tuberosum L.), SSR, STS, genetic diversity. ABSTRAKKentang (Solanum tuberosum L.) merupakan salah satu tanaman hortikultura yang memiliki nilai ekonomis tinggi. Meningkatnya kebutuhan konsumsi kentang nasional menjadi tantangan bagi pemulia kentang. Tersedianya sumber keragaman genetika merupakan prasyarat keberhasilan program pemuliaan suatu varietas. Penelitian ini bertujuan menganalisis keragaman genetika empat belas aksesi kentang menggunakan marka simple sequence repeats (SSR) dan sequence-tagged sites (STS). Hasil analisis polymerase chain reaction (PCR) diberi skor sebagai data biner. Analisis data dilakukan menggunakan perangkat lunak NTSYS dan PowerMarker. Hasil penelitian menunjukkan dari 19 marka yang digunakan terdapat 12 marka (63%) yang bersifat polimorfik. Sebanyak 60 alel berukuran antara 200-500 bp dengan kisaran 2-9 alel per lokus berhasil dideteksi. Nilai polymorphic information content (PIC) menunjukkan rerata sebesar 0,59 dengan nilai tertinggi 0,74 (RGH-SSR 21) dan nilai terendah 0,36 (RGH-SSR 30). Rerata frekuensi alel utama adalah 49,42% dengan nilai terendah 35,71% (STG-0016) dan nilai tertinggi 63,64% (RGH-SSR 40). Terdapat 9 marka dengan nilai PIC >0,5 yang dapat digunakan untuk mendeteksi keragaman genetika aksesi kentang. Keragaman aksesi kentang tersebut cukup tinggi, seperti yang direfleksikan oleh nilai rerata diversitas gen, yaitu 0,65. Hasil analisis klaster menunjukkan bahwa keempat belas aksesi kentang tersebut mengelompok menjadi dua kelompok utama pada koefisien 0,70. Kelompok pertama terdiri atas varietas Atlantik, GM 05, Granola Kembang, dan Merbabu 17, sedangkan kelomp...

<p>Potato is one of important carbohydrate sources used as an alternative crop in Indonesia. The challenges in national potato breeding program included low productivity, less tolerance to environmental stresses, and narrow genetic diversity. The purpose of this study was to analyze genetic diversity of 14 potato genotypes based on morphological characters and SSR<br />markers newly developed from genome sequences of Indonesian potato genotypes. Principal component analysis of morphological data was done using program XLSTAT. DNA of 14 potato genotypes were assayed using 22 SSR markers. Phylogenetic tree was constructed using program NTSYS version 2.1. The PCA showed that leaf shape, leaf color, tuber shape,<br />tuber skin color, and tuber color contributed most to the total diversity. SSR polymorphism analysis demonstrated that as many as 196 alleles were detected in this study. The average allele number was 8.9 ranged from 5 to 13 alleles per locus. The average major allele frequencies was 22% ranged from 14 to 43%. Gene diversity ranged from 0.70 to 0.92 with the average of 0.86, meanwhile the heterozigosity observed ranged from 0 to 0.71 with the average of 0.05. Phylogenetic analysis generated two main clusters in the coefficient of similarity 0.77. The first cluster consisted of three genotypes while the second cluster consisted of eleven genotypes. The new developed SSR markers used in this study were able to differentiate potato accessions having similar morphological characters but were different genetically. The results of this study should be useful in assessing<br />genetic materials in potato cultivar development program.</p>