Judul: Performance and Yield Evaluation of Five Crosses of Super Spicy Chili (Capsicum chinense Jacq.) Genotypes
Abstrak: Cabai (Capsicum spp.) merupakan komoditas hortikultura yang penting bagi masyarakat Indonesia karena memiliki nilai ekonomi yang tinggi. Cabai super pedas dapat memberikan tingkat kepedasan yang lebih tinggi dari cabai pada umumnya sehingga diharapkan mampu mengurangi jumlah penggunaan cabai pada industri makanan atau lingkungan rumah tangga. Departemen Agronomi dan Hortikultura IPB memulai pemuliaan cabai spesies C. chinense Jacq. dengan menghasilkan 11 hasil persilangan dari lima genotipe tetua cabai super pedas yang perlu dievaluasi. Penelitian ini bertujuan mengevaluasi keragaan serta daya hasil 11 hasil persilangan tersebut serta melihat potensi genotipe silangan yang memiliki keragaan dan daya hasil lebih baik daripada genotipe pembandingnya. Penelitian dilaksanakan dari bulan Desember 2022 hingga November 2023 di Kebun Percobaan CV Benih Dramaga. Penelitian terdiri dari dua percobaan yang dilakukan secara paralel dengan masing-masing satu faktor yaitu genotipe pada dua lingkungan (4 genotipe persilangan dan 4 genotipe pembanding pada rumah kaca serta 4 genotipe persilangan dan 3 genotipe pembanding pada lahan terbuka). Penanaman menggunakan rancangan kelompok lengkap teracak dengan tiga ulangan. Hasil persilangan menunjukkan genotipe KAT×RBJ, KAT×FAT, dan HF×KAT memiliki keragaan dan daya hasil yang lebih baik serta Genotipe KAT ×RBJ memiliki tingkat kepedasan yang paling tinggi mencapai 1.095.000 Scoville Heat Units., Chili (Capsicum spp.) is one of the most important horticultural commodities in Indonesia because of its high economic value. Super spicy chili (Capsicum chinense Jacq.) surpasses regular chili in spiciness, potentially reducing chili consumption in the food industry and households. The Department of Agronomy and Horticulture at Bogor Agricultural University initiated the breeding of chinense pepper species by producing 11 crossbreed results from five parental genotypes that need to be evaluated. This study aims to assess the performance and yield of 11 hybrid genotypes, identifying those with superior traits compared to their respective parental references. The study was conducted from December 2022 to November 2023 at the Experimental farm of CV Benih Dramaga, consists of two experiments conducted in parallel, each with a single factor: genotype, in two environments (4 hybrid genotypes and 4 reference genotypes in the greenhouse, and 4 hybrid genotypes and 3 reference genotypes in the open field). Planting was arranged in a completely randomized block design with three replications. Genotypes KAT×RBJ, KAT×FAT, and HF×KAT exhibited superior performance and yield compared to the parental genotypes. Additionally, the KAT×RBJ genotype demonstrated the highest level of spiciness, reaching 1.095.000 Scoville Heat Units.
Keyword: hortikultura, multilingkungan, pemuliaan, tingkat kepedasan

Judul: Performance and Yield Evaluation Seven Genotype of IPB Hybrid and Non Hybrid Red Cayenne Pepper (Capsicum frutescens L.)
Abstrak: Cabai rawit merah (Capsicum frutescens L.) merupakan salah satu komoditas hortikultura yang penting dan mempunyai nilai ekonomi tinggi bagi masyarakat Indonesia. Hal ini menjadikan kegiatan pemuliaan tanaman cabai rawit merah perlu untuk dilakukan. Penelitian ini bertujuan mengevaluasi keragaan dan daya hasil tiga genotipe cabai rawit merah hibrida dan empat genotipe cabai rawit non hibrida dengan 3 varietas pembanding. Penelitian dilaksanakan dari bulan September 2022 sampai Maret 2023 di Kebun Percobaan Leuwikopo IPB. Penelitian terdiri dari satu faktor yaitu genotipe (7 genotipe dan 3 varietas pembanding). Penanaman menggunakan rancangan kelompok lengkap teracak dengan tiga ulangan. Hasil penelitian menunjukkan bahwa terdapat perbedaan keragaan dan daya hasil antar genotipe cabai rawit merah. Umur berbunga semua genotipe uji berkisar 41,33-45,67 HST dengan umur panen yang berkisar antara 83,33-92,67 HST. Persentase tanaman hidup yang diamati pada akhir panen berkisar antara 37,50-70,83% dengan varietas pembanding Rawita F1 yang memiliki persentase terendah sebesar 37,50%. Genotipe F1.372340 merupakan genotipe dengan produktivitas yang paling tinggi mencapai 4,80 ton ha-1. Produktivitas genotipe tersebut masih lebih tinggi dibandingkan produktivitas varietas pembanding yang berkisar 1,48-2,72 ton ha-1. Genotipe uji memiliki daya simpan berkisar 9,30-15,00 HSP yang sama atau lebih baik daripada varietas pembanding yang berkisar 9,67-12,33 HSP., Red cayenne pepper (Capsicum frutescens L.) is one of the important horticultural commodities and has high economic value for the people of Indonesia. This makes the chili plant breeding activities necessary to do. This research aims to evaluate the performance and yield of three genotypes of hybrid red cayenne pepper and four genotypes of non hybrid red cayenne pepper with three differences varieties. The research was carried out from September 2022 to March 2023 at the Leuwikopo Experimental Garden, IPB. The research consisted of one factor, which is genotype (7 genotypes and 3 control varieties). Planting using a randomized complete block design with three replications. The results showed that there were differences in performance and yield between red cayenne pepper genotypes. The flowering ages of all genotypes ranged from 41.33-45.67 DAP with the harvest ages ranging from 83.33-92.67 DAP. The percentage of live plants observed at the end of harvest ranged from 37.50-70.83% with the Rawita F1 variety having the lowest percentage of 37.50%. The F1.372340 genotype was the genotype with the highest productivity, reaching 4.80 tonnes ha-1. The productivity of these genotypes was still higher than the productivity of the control varieties, which ranged from 1.48 to 2.72 tons ha-1. The test genotypes had shelf life ranging from 9.30-15.00 DAH which was the same or better than the control varieties which ranged from 9.67-12.33 DAH.
Keyword: cayenne pepper, evaluation, hybrid, non hybrid, 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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