Judul: Yield Evaluation and Performance IPB’s Hybrid Sweet Corn (Zea mays var. saccharate Sturt.) in Lampung
Abstrak: SATRIO AJI PRATAMA. Evaluasi dan Daya Hasil Jagung Manis Hibrida (Zea mays var. saccharata Sturt) IPB di Lampung. Dibimbing oleh AHMAD JUNAEDI dan ARYA WIDURA RITONGA. Kegiatan memperoleh informasi keragaan dan daya hasil pada galur atau calon varietas potensial merupakan bagian penting dalam kegiatan pemuliaan tanaman. Penelitian ini bertujuan untuk memperoleh informasi keragaan dan daya hasil 15 genotipe jagung manis hibrida di Lampung. Penelitian ini menggunakan rancangan kelompok lengkap teracak (RKLT) faktor tunggal dengan 3 ulangan. Materi genetik yang digunakan yaitu 12 genotipe jagung manis hibrida hasil pemuliaan IPB dan 3 varietas komersial sebagai varietas pembanding. Berdasarkan hasil penelitian diperoleh sebagian besar hibrida uji memiliki keragaan agronomi yang baik dan daya hasil yang tinggi. Hibrida yang memiliki keragaan agronomi yang baik dan memiliki daya hasil yang tinggi berpotensi untuk dikembangkan lebih lanjut meskipun hasilnya sebagian besar tidak berbeda nyata dengan varietas pembanding. Hibrida yang berpotensi untuk dikembangkan lebih lanjut antara lain SM1.1.9 × SB8.3.4, SM6.3.1×SM1.1.9, SM6.3.1 × SM12.2.13, SM6.3.1 × T13.1.8.1, dan SM9.3.A.1 × T13.1.8.1. Kata kunci: ekspresi gen, produktivitas tinggi, persilangan galur, produksi potensial, SATRIO AJI PRATAMA. Yield Evaluation and Performance IPB’s Hybrid Sweet Corn (Zea mays var. saccharate Sturt.) in Lampung. Supervised by AHMAD JUNAEDI and ARYA WIDURA RITONGA. Obtaining information on the performance and yield of potential lines or candidate varieties is an essential aspect of plant breeding activities. This study aimed to obtain information on the performance and yield of 15 hybrid sweet corn genotypes in Lampung. This study arranged in a single-factor randomized complete group design (RKLT) with 3 replications. The genetic materials utilized were 12 hybrid sweet corn genotypes from IPB breeding lines and 3 commercial varieties as comparison varieties. The results indicated that the majority of the hybrids exhibited favorable agronomic performance and high yield potential. These hybrids, with their demonstrated agronomic performance and yield potential, represent a promising lines for further development. However, it is noteworthy that the majority of the results did not exhibit statistically significant differences from the comparison varieties. Hybrids with the potential for further development include SM1.1.9 × SB8.3.4, SM6.3.1 × SM1.1.9, SM6.3.1 × SM12.2.13, SM6.3.1 × T13.1.8.1, and SM9.3.A.1 × T13.1.8.1. . Keywords: gene expression, high productivity, crossing lines, potential production
Keyword: gene expression, high productivity, crossing lines

Judul: Performance Evaluation and Power Yield on  11 Hybrids Sweet Corn Genotypes (Zea mays saccharata. Sturt) Breeding Results of IPB University
Abstrak: Informasi keragaan dan daya hasil diperlukan dalam merakit varietas unggul baru. Penelitian ini bertujuan mengevaluasi keragaan dan daya hasil jagung manis hibrida harapan IPB. Penelitian dilakukan pada bulan Desember 2022 sampai Februari 2023 di Kebun Percobaan Leuwikopo, Dramaga, Bogor, Jawa Barat. Penelitian terdiri dari satu faktor yaitu genotipe sebanyak 13 genotipe jagung manis hibrida. Penanaman dilakukan menggunakan rancangan kelompok lengkap teracak dengan 3 ulangan dari 20 tanaman per satuan percobaan. Hasil menunjukkan bahwa terdapat perbedaan keragaan dan daya hasil antar genotipe jagung manis hibrida IPB dan varietas jagung manis pembanding. Genotipe berpengaruh sangat nyata terhadap semua karakter yang diamati, kecuali diameter batang dan anthesis silking interval. Genotipe SB.13B X SM.9.3A.1 dan SB.5.1B.3B X T.13.1.8 memiliki beberapa keunggulan pada karakter seperti produktivitas, bobot tongkol tanpa kelobot, dan anthesis silking interval yang setara atau lebih baik dari varietas pembanding. Kedua genotipe hibrida harapan IPB ini memiliki produktivitas berkisar 19,04-20,42 ton per hektar sedangkan varietas pembanding berkisar antara 21,06-23,71 ton per hektar. Bobot tongkol tanpa kelobot kedua genotipe IPB berkisar 257,33-261,85 gram sedangkan varietas pembanding berkisar antara 249,13-253,53 gram., Information about performance and power yield of sweet corn is needed in assembling new superior varieties. This research aims to evaluate the performance and power yield of the expected hybrid sweet corn from IPB. The research was conducted from December 2022 to February 2023 at the Leuwikopo Experimental Garden, Dramaga, Bogor, West Java. The research consisted of one factor, which was the genotypes of 13 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 power yield among the genotype sweet corn hybrids of IPB and comparison sweet corn varieties. Genotype had a very significant effect on all the characters that observed, except stem diameter and anthesis silking interval. The SB.13B X SM.9.3A.1 genotypes and SB.5.1B.3B X T.13.1.8 genotypes had several advantages of characters such as productivity, ear weight without husk, and anthesis silking interval which were equal or better than the comparison varieties. Genotypes SB.13B X SM.9.3A.1 and SB.5.1B.3B X T.13.1.8 had productivity ranging from 19.04 to 20.42 tons per hectare while comparison varieties ranged from 21.06-23.71 tons per hectare. The ear weight without husk of genotypes SB.13B X SM.9.3A.1 and SB.5.1B.3B X T.13.1.8 ranged from 257.33 to 261.85 grams while comparison varieties ranged from 249.13-253.53 grams.
Keyword: anthesis silking interval, ear weight, evaluation, productivity

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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