Judul: Performance Evaluation and Yield Power on the IPB Purple Hybrid Sweet Corn (Zea mays saccharata Sturt).
Abstrak: Jagung manis (Zea mays saccharata Sturt) atau sweet corn merupakan komoditas hortikultura yang banyak digemari. Perakitan varietas jagung manis ungu perlu terus dilakukan untuk mendukung peningkatan produktivitas jagung manis dan progam biofortifikasi pangan. Institut Pertanian Bogor memiliki beberapa galur hibrida jagung manis ungu yang belum diuji keunggulannya. Penelitian ini bertujuan mengetahui keunggulan calon varietas jagung manis ungu IPB. Penelitian dilakukan bulan Oktober-Januari di kebun Percobaan PKHT IPB Pasir Kuda. Penelitian terdiri atas 1 faktor yaitu genotipe (1 genotipe uji dan 3 varietas komersil). Penanaman menggunakan rancangan kelompok lengkap teracak yang terdiri atas 4 ulangan. Hasil penelitian menunjukkan bahwa produktivitas genotipe uji JMU H1 IPB lebih rendah dibandingkan varietas pembanding. Padatan terlarut total genotipe uji setara dengan varietas pembanding potensial digunakan sebagai penciri utama genotipe JMU H1 IPB yaitu adanya antosianin yang kuat pada tulang daun, ruas batang, akar penyangga, selain dasar bunga jantan, pada rambut bunga betina, dan warna kelobot yang merah keunguan (N79 C)., Sweet corn (Zea mays saccharata Sturt) is a popular horticultural commodity. The assembly of IPB purple sweet corn varieties needs to continue to support to increase sweet corn productivity and the food biofortification program. The Bogor Agricultural Institute has several hybrid lines of purple sweet corn which superiority character has not been tested. This research was aimed to determine the superiority of the candidate of IPB purple sweet corn variety. Observations were carried out in October-January at the PKHT IPB Pasir Kuda Experimental Garden. The research consisted of 1 factor, namely genotype (1 test genotype and 3 commercial varieties). The experimental design was arranged in randomized complete group design consisting of 4 replications. The results showed that the productivity of the JMU H1 IPB genotype was lower than the comparison variety. The sugar content of total soluble solids of JMU H1 IPB were equivalent than the comparison variety. Characters that have the potential to be used as the main characteristics of the JMU H1 IPB genotype are the presence of strong anthocyanins in the leaf veins, stem segments, supporting roots, apart from the base of the male flowers, the hairs of the female flowers, and the purplish red color of the husks (N79 C).
Keyword: antosianin, biofortifikasi, hibrida, jagung manis, varietas unggul

Judul: Performance Evaluation and Yield Power of Hybrid Sweet Corn (Zea mays var. saccharata Sturt.)
Abstrak: Informasi keragaan dan daya hasil sangat penting dalam kegiatan pemuliaan tanaman. Penelitian ini bertujuan mengevaluasi keragaan dan memperoleh informasi daya hasil jagung manis hibrida hasil pemuliaan IPB. Penelitian dilaksanakan pada bulan November 2022 sampai Februari 2023 di Kebun Percobaan Leuwikopo, Dramaga, Bogor, Jawa Barat. Penelitian terdiri dari satu faktor yaitu genotipe sebanyak 14 genotipe jagung manis hibrida. Penanaman menggunakan rancangan kelompok lengkap teracak dengan tiga ulangan dimana setiap satuan percobaan terdiri atas 20 tanaman. Hasil penelitian menunjukkan bahwa terdapat perbedaan keragaan dan daya hasil antara genotipe jagung manis. Umur panen, padatan terlarut total dan produktivitas hibrida SM 9.3A.1 x T13.1.8, hibrida SB 13.1.3B x SM.9.3A.1, hibrida SB 13.1.3B x SM 12.1.5B, hibrida SB 5.1B.3B x T13.1.8, dan hibrida SB5.1B.3B x SM9.3A.1 setara atau lebih baik dari varietas pembanding. Lima genotipe hibrida jagung manis IPB ini memiliki umur panen berkisar antara 65-71 HST sedangkan varietas pembanding berkisar antara 70-71 HST. Padatan Terlarut Total (PTT) lima hibrida uji IPB berkisar antara 14,38-14,93 0brix sedangkan varietas pembanding berkisar antara 13,52-14,67 0brix. Produktivitas lima hibrida uji IPB berkisar antara 10,76-13,41 ton per hektar sedangkan varietas pembanding berkisar antara 12,72-16,02 ton per hektar., The Information about performance and yield power is crucial in plant breeding activities. This research aims to evaluate the performance and obtain information on the yield power of hybrid sweet corn breeding results from IPB. The research was conducted from November 2022 to February 2023 at the Leuwikopo Experimental Garden, Dramaga, Bogor, West Java. The research consisted of one factor, which was the genotypes of 14 hybrid sweet corn genotypes. Planting was done using a randomized complete group design with three repetitions where each experimental unit consists of 20 plants. The results showed that there were differences in performance and yield power among the sweet corn genotypes. The harvest age, total dissolved solids and productivity of SM 9.3A.1 x T13.1.8 hybrid, SB 13.1.3B x SM.9.3A.1 hybrid, SB 13.1.3B x SM 12.1.5B hybrid, SB 5.1B.3B x T13.1.8 hybrid, and SB5.1B.3B x SM9.3A.1 hybrid were equivalent or better than the comparison variety. The five hybrid sweet corn genotypes from IPB had a harvest age ranging from 65-71 HST while comparison varieties ranged from 70-71 HST. The Total Dissolved Solids (PTT) of the five IPB test hybrid ranged from 14.38-14.93 0brix while comparison varieties ranged from 13.52-14.67 0brix. The productivity of the five IPB test hybrid ranged from 10.76-13.41 tons per hectare, while the comparison varieties ranged from 12.72-16.02 tons per hectare.
Keyword: character, hybrid, performance, plant breeding, sweet corn

Judul: Hamiltonian formulation for linear waves motion in two layers fluid
Abstrak: The surface wave could be considered as a wave that separates two fluids, namely water and air. Based on this assumption, it is introduced the interfacial wave, a wave between two layers of fluid with different density. The formulation of interfacial waves motion begins with deriving the base equation of irrotational ideal fluid. Furthermore, according to irrotational fluid assumption, the base equation can be stated in velocity potential. In this derivation, the fluids domain is assumed to be restricted by rigid lid boundary conditions, both at the upper and lower limit. Therefore, the interfacial waves motion can be explained in a hamiltonian formulation. In the hamiltonian formulation, total energy is defined as the sum of kinetic and potential energy. The hamiltonian system is obtained from reduction of kinetic energy by using the Dirichlet Neumann Operator. The resulted kinetic energy equation is nonlinear. Therefore, this form is linearized by first part of the Taylor expansion. This linearization gives a dispersion relation of linear wave. Based on this dispersion relation, the phase speed of the linear wave depends on the density ratio of the two layers fluid.
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