ABSTRAKNematoda puru akar (Meloidogyne spp.) adalah salah satu penyebab menurunnya produksi kentang di Sulawesi Utara. Hingga saat ini spesies Meloidogyne pada kentang di Sulawesi Utara belum diidentifikasi. Penelitian ini bertujuan mendeteksi dan mengidentifikasi spesies Meloidogyne pada kentang dan mengetahui hubungan kekerabatannya dengan spesies dari negara lain. Sampel umbi kentang bergejala bintil dikumpulkan dari 3 sentra produksi kentang di Provinsi Sulawesi Utara, yaitu Kakenturan (Minahasa Selatan), Purworejo, dan Singsingon (Bolaang Mongondow Timur). Identifikasi morfologi dilakukan berdasarkan pola perineal nematoda betina. Identifikasi molekuler dengan teknik PCR menggunakan primer spesifik untuk mengamplifikasi daerah ITS-rDNA, dilanjutkan dengan sikuensing fragmen DNA dan analisis filogenetika. Dua spesies Meloidogyne berhasil diidentifikasi, yaitu M. javanica (sampel asal Kakenturan, Purworejo, Singsingon), dan M. incognita (sampel asal Purworejo). M. javanica dan M. incognita sampel asal Sulawesi Utara memiliki tingkat homologi berturut-turut hingga 97.5% dan 100 % dengan spesies yang sama asal Cina.Kata kunci: homologi, identifikasi molekuler, ITS-rDNA, morfologi ABSTRACT Root-knot nematode (Meloidogyne spp.). is one of the main constraint of potato production in North Sulawesi. Little is known about Meloidogyne species infecting potatoes in North Sulawesi. Therefore, research was conducted to identify Meloidogyne spp. on potatoes in North Sulawesi and further study their relationship with related species from other countries. Infected potato tubers with pimple-like knot symptom were collected from three potato production centers, i.e. Kakenturan (South Minahasa), Purworejo, and Singsingon (East Bolaang Mongondow). Morphological identification was conducted based on the perineal pattern of the female; whereas molecular identification was conducted by PCR using specific primer for ITS-rDNA, followed by DNA sequencing and phylogenetic analysis. Two Meloidogyne species were identified i.e. M. javanica (samples form Kakenturan, Purworejo and Singsingon) and M. incognita (samples from Purworejo). M. javanica and M. incognita from North Sulawesi are similar to the related species from China with homology level of 97.5 % and 100 %, respectively.
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