Please purchase PDFcamp Printer on http://www.verypdf.com/ to remove this watermark. ANALISIS KERAGAMAN GENETIK GENERASI S4 JAGUNG MANIS (Zea mays saccharata Sturt) X JAGUNG KETAN (Zea mays ceratina Kulesh) BERDASARKAN PENANDA MIKROSATELIT DAN FENOTIPE TANAMAN Genetic Diversity Analysis of S4 Inbred Line of Sweet Corn (Zea mays saccharata Sturt) x Waxy Corn (Zea mays ceratina Kulesh) Based On Microsatellite and Phenotype ABSTRAK Persilangan jagung manis dengan jagung ketan menghasilkan tongkol dengan warna biji yang beragam. Untuk mendapatkan tanaman hasil persilangan dengan warna yang seragam maka dilakukan persilangan sendiri (selfing/sibmating) dan diperoleh 16 nomor genotipe terpilih yang dibagi dalam kelompok genotipe dengan warna kernel campuran yaitu G1, G2, G3, G4, G5, G6, G7 dan G8; kelompok genotipe dengan warna kernel seragam yaitu G9, G10, G11, G12, G13, G14, G15 dan G16. Enam belas genotipe tersebut dianalisis keragaman fenotipik dan genetiknya. Tujuan dari penelitian ini adalah untuk mengetahui fingerprinting tanaman jagung manis hasil persilangan, mengklarifikasi keragaman fenotipe tanaman dengan keragaman genetic melalui analisis molekuler dan mempelajari pola pita DNA yang berhubungan dengan karakter fenotipe tertentu. Hipotesis yang diajukan dari penelitian ini adalah (1) terdapat satu atau beberapa nomor genotipe dengan pola pita DNA yang seragam, (2) terdapat satu atau beberapa nomor genotipe dengan fenotipe yang seragam dan (3) terdapat korelasi antara satu atau beberapa karakter fenotipe dengan pola pita DNA. Penelitian ini dilaksanakan pada bulan Januari – Juni 2011. Percobaan laboratorium dilaksanakan di Laboratorium Bioteknologi Jurusan Budidaya Pertanian Fakultas Pertanian Universitas Brawijaya. Percobaan lapang dilakukan di Kelurahan Dadaprejo, Kecamatan junrejo, Kota Batu. Ekstraksi DNA menggunakan metode CTAB yang dimodifikasi dengan karbon aktif. Amplifikasi PCR menggunakan 2 primer SSR yaitu ZCT161 dan PHI080. Rancangan percobaan lapang menggunakan Rancangan Acak Kelompok. Hasil analisis molekuler menunjukkan 16 genotipe yang digunakan terbagi dalam 4 grup dengan pola pita DNA yang berbeda, G10 dan G11 memiliki koefisien kemiripan Jaccard terkecil dari genotype lainnya. Hasil percobaan lapang menunjukkan seluruh genotype yang diuji memiliki koefisien keragaman yang rendah di dalam genotipe. Analisis koefisien korelasi menunjukkan tinggi tongkol pertama berkorelasi positif dengan koefisien kemiripan Jaccard DNA (rs = +0.7). Kata kunci: jagung manis, Zea mays saccharata, keragaman, mikrosatelit Abstract Sweet corn crossed with waxy corn produced corn with variety (heterogenous) kernel color within ear. Sibmating and selfing has been done to get corn with homogenous kernel color and select 16 genotype divided to 2 group of kernel color, Genotype with heterogenous kernel color group consist of G1, G2, G3, G4, G5, G6, G7 and G8; genotype with homogenous kernel color group consist of G9, G10, G11, G12, G13, G14, G15 and G16. The aim of the research are to know the fingerprinting of sweetcorn inbredlines, to clarify phenotypic diversity with genetic diversity through molecular analysis and to study DNA banding pattern correlated to phenotypic character. Hypothesis from this research are (1) Please purchase PDFcamp Printer on http://www.verypdf.com/ to remove this watermark. there are several number of sweetcorn genotypes with an uniform DNA banding pattern, (2) there are several number of sweetcorn genotypes with an uniform phenotype character and (3) there is a correlation between phenotypic character and DNA banding pattern. Research was held on January until June 2011. Laboratory experiment conducted in Biotechnology Laboratorium, Jurusan Budidaya Pertanian, Faculty of Agriculture, University of Brawijaya and field experiment conducted in Dadaprejo, Kecamatan Junrejo, Kota Batu. Plant material of the research were 16 genotypes of S4 sweet corn inbred line, DNA extraction method used CTAB-active charcoal DNA extraction method, PCR used 2 SSR primer (ZCT161 and PHI080). Result of the laboratory experiment are there are 4 groups from DNA Jaccard coefficient which consist of different type of kernel color genotype within group. Field experiment used Randomized Block Design with 3 replication. Phenotype parameters calculated were type of first leaf, plant height, leaves number, leaf length, leaf width, male flowering time, female flowering time, ear number, first ear height, harvesting livespan, ear length, ear diameter and kernel color. Field experiment showed significant different character between genotype in leaves number, leaf length, plant height, male flowering time, harvesting livespan, ear number, first ear height, ear length and ear diameter. All sweet corn inbred lines have low coefficient of variance within genotype except in ear number and ear length. Jaccard coefficient of first leaf type showed there are 5 groups of 16 genotype of sweet corn which different member with group from DNA Jaccard coefficient. Fisrt ear height have the highest Spearman’s Rank correlation coefficient (rs=+0.7) with DNA Jaccard coefficient. Keyword: sweetcorn, Zea mays saccharata, diversity, microsatellite