Judul: Pendugaan Nilai Heterosis Genotipe F1 Sorgum (Sorghum bicolor (L.) Moench) Hasil Persilangan Line × Tester.
Abstrak: The objectives of this research were to evaluate performance and to estimate general combining ability, specific combining ability and heterosis in F1 genotypes of sorghum were crossed in a line × tester mating design. The experiment was conducted at Leuwikopo Experimental Farm, Bogor Agricultural University, Dramaga, Bogor from January to April 2014. The experiment was conducted in a Completly Randominzed Design, in three replications. The result of analysis of variance showed high significant difference for all variables used. Based on GCA effects the line P/I 150-20-A and tester Kawali was a good combiner for plant height character. Line P/I 150-21-A and tester Numbu was a good combiner for weight of grains character. The hybrid combinations of P/I 150-20-A × Kawali was recorded as the best specific combiner for height character and B-69 × Numbu was recorded as the best specific combiner for weight of grains character. Among the hybrids, P/I 150-20-A × Kawali was recorded minimum plaint height with 5.30, -11.86 % heterosis over the mid parent and better parent and B-69 × Numbu was recorded maximum weight of grains with 72.02, 33.46 % heterosis over the mid parent and better parent.
Keyword: SCA, heterobeltiosis, heterosis, GCA

Judul: Evaluasi Karakter Agronomi Galur-galur Generasi Awal Sorgum (Sorghum bicolor (L.) Moench) Hasil Persilangan B-69 x Numbu
Abstrak: The objectives of this experiment were to evaluate performance and variability of agronomic characters of 62 F3, 31 BC1P1F2 and 31 BC1P2F2 of early generation lines of sorghum. This research was carried at Leuwikopo Experimental Farm, Bogor Agricultural University, Dramaga, Bogor from February to June 2013. The experiment was arranged in a randomized complete block design augmented with one factor genotype and 12 replications. The agronomic data was analyzed by comparing means of each line to the parental lines B-69 and Numbu. The results showed that the early generation lines showed significant difference with the parental lines, B-69 and Numbu for agronomic characters and yield components. The early generation lines from BC1P2F2 have higher mean value for stem diameter, crop height and biomass weight, compared to B-69 and Numbu, while the BC1P1F2 lines have lower crop height compared to B-69 and Numbu. The panicle weight and seed weight per plant have high heritability value, which allow for further selection.
Keyword: sorghum, early generation, heritability

Judul: Distribusi spasial kima (Tridacnidae) dan hubungannya dengan kondisi ekologis terumbu karang di Kepulauan Karimunjawa, Jawa Tengah
Abstrak: Indonesia dengan luas lautan 6.87 juta km² memiliki keanekaragaman hayati laut yang kaya, terutama ekosistem terumbu karang dengan luas kurang lebih 50.000 km². Berdasarkan perkiraan, 70 % terumbu karang dunia akan rusak dan hilang pada 10 sampai 40 tahun mendatang akibat dari perubahan iklim global. Kima dari famili Tridacnidae sebagai salah satu penyusun utama terumbu karang merupakan jenis bivalvia berukuran relatif besar yang distribusinya terbatas hanya di daerah ekosistem terumbu karang Indo-Pasifik. Pada beberapa dekade terakhir, kima telah mengalami eksploitasi besar-besaran. Eksploitasi kima secara besar-besaran dapat menyebabkan kepunahan biota kima tersebut dan mengakibatkan kerusakan terumbu karang yang hidup juga (Pasaribu, 1988). Oleh karena itu pemerintah mengumumkan ketujuh kima yang ada di Indonesia sebagai biota laut yang dilindungi berdasarkan Surat Keputusan Menteri Kehutanan no. 12/Kpts - II/1987. Tiga spesies kima (Tridacna gigas, T. derasa dan Hippopus porcellanus) yang dahulu melimpah di seluruh Indonesia kini telah berkurang secara mencolok. Penelitian singkat atas populasi kima di Kepulauan Seribu dan Kepulauan Karimunjawa menunjukkan bahwa T. gigas dan T. derasa telah punah. Spesies­ spesies lainnya, T.crocea, T. squamosa dan Hhippopus, masih ditemukan namun telah mengalami penurunan populasi.
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