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Problems encountered in the development of the coconut is the limited availability of improved seed, and almost all developing regions require palms, which grow well in specific locations. One of the producing regions of coconut is Sumbawa district in West Nusa Tenggara. The objective of this research was to evaluating the yield of Mastutin coconut and its potential to suport coconut variety development in Indonesia. The evaluation was conducted by observing the selected mother palms in the Mastutin coconut original location. The research was conducted around three years (2012 – 2014) in Labuhan Mapin village, Sumbawa district, by using observation method. Observations were carried out on the vegetative and generative characters, components of fruit, the chemical composition of the endosperm, high yielding block, and parrent tall coconut. The results indicated the potency of Mastutin coconut yield was > 3 tons copra per ha per year. The oil content of Mastutin coconut was 61,88 %. It grows well in areas having drought period of 4 – 6 months, and has large stem girth characters. Population of tall coconut palms growing in Labuan Mapin Village are suitable as high yielding block. Tall coconut in the village of Labuan Mapin could potentially produced ± 75 970 seeds per year from a total of 710 selected high yielding palms. The Mastutin Tall coconut from the Labuhan Mapin village has been released as local superior tall coconut variety under the name of Mastutin Tall Coconut. The coconut seeds produced from selected Mastutin Tall population can be used as breeding materials for creating new superior coconut variety, as seed sources for coconut development and replanting programs. ABSTRAK Permasalahan yang ditemui dalam pengembangan kelapa adalah terbatasnya ketersediaan benih unggul. Hampir semua daerah pengembangan membutuhkan benih kelapa yang spesifik lokasi agar produksinya optimal. Salah satu daerah penghasil kelapa di Indonesia adalah Kabupaten Sumbawa di Nusa Tenggara Barat. Penelitian ini bertujuan untuk mempelajari potensi produksi benih kelapa Mastutin, melalui pengamatan pohon induk terpilih sebagai materi pengembangan kelapa di Indonesia. Penelitian dilakukan sejak tahun 2012 – 2014 di Desa Labuan Mapin, Kabupaten Sumbawa dengan menggunakan metode observasi. Pengamatan dilakukan terhadap karakter vegetatif, generatif, komponen buah, komposisi kimia daging buah, populasi atau blok pertanaman, pohon induk sebagai sumber benih. Hasil observasi menunjukkan bahwa kelapa Dalam di Desa Labuan Mapin mempunyai potensi produksi tinggi, yaitu > 3 ton kopra per ha per tahun dengan kadar minyak 61,88% dan dapat tumbuh baik pada daerah yang memiliki bulan kering 4 – 6 bulan; memiliki ukuran batang besar. Berdasarkan hasil penilaian populasi atau blok pertanaman, populasi kelapa Dalam di Desa Labuan Mapin memenuhi syarat sebagai Blok Penghasil Tinggi (BPT). Hasil seleksi diperoleh sebanyak 710 Pohon Induk Terpilih (PIT) dengan potensi produksi benih sebanyak ± 75.970 butir per tahun. Kelapa Dalam di Desa Labuan Mapin, telah dilepas sebagai varietas unggul lokal dengan nama kelapa Dalam Mastutin. Pohon Induk Terpilih kelapa Dalam varietas Mastutin dapat digunakan sebagai materi pemuliaan untuk merakit varietas unggul baru,dan sebagai sumber benih untuk pengembangan dan peremajaan.

Potensi Pengembangan Varietas Kelapa Dalam Mastutin asal Sumbawa NTB / The Potency to Develop Mastutin Tall Variety from Sumbawa NTB