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: Yield Performance Evaluation of Hybrid and Non Hybrid Lines of Chili Pepper (Capsicum annuum L.) for New Variety Release
Abstrak: Cabai (Capsicum annuum L.) merupakan komoditas hortikultura yang bernilai ekonomi dan konsumsi yang tinggi, sehingga perlu dukungan ketersediaan varietas unggul dengan meningkatkan upaya pelepasan varietas atas kandidat varietas hasil pemuliaan tanaman. Penelitian ini bertujuan untuk mengevaluasi daya hasil galur hibrida dan non hibrida cabai besar IPB serta mengidentifikasi keunggulan galur uji cabai besar IPB yang akan dilepas menjadi varietas unggul baru. Penelitian ini dilaksanakan pada bulan September 2021 – Februari 2022 di Kebun Percobaan Leuwikopo IPB dan Laboratorium Pemuliaan Tanaman IPB. Rancangan percobaan yang digunakan adalah Rancangan Kelompok Lengkap Teracak (RKLT) faktor tunggal dengan genotipe cabai sebagai perlakuan. Perlakuan genotipe terdiri dari 10 genotipe cabai yang terdiri dari 1 galur uji hibrida, 2 galur uji non hibrida, 5 varietas pembanding hibrida, dan 2 varietas pembanding non hibrida. Setiap genotipe diulang sebanyak tiga kali sehingga terdapat 30 satuan percobaan. Hasil penelitian menunjukkan bahwa galur uji hibrida (F1.074005) maupun non hibrida (F12.120005 dan F8.074136) memiliki keunggulan seperti umur berbunga dan umur panen tergolong genjah (21,67-23,67 HST dan 66,3-68 HST), penampilan buah yang termasuk ke dalam mutu I SNI, bobot per buah tinggi (6,73 – 10,96 g), jumlah buah per tanaman banyak (78 – 129 buah), dan persentase hidup tinggi (88,33 – 96,67 %). Hasil uji korelasi menunjukkan bahwa potensi hasil tanaman berkorelasi sedang dengan karakter panjang daun, ketebalan buah, bobot per buah, jumlah buah per tanaman, bobot buah per tanaman, produktivitas, dan persentase hidup tanaman. Galur hibrida F1.074005, dan dua galur non hibrida F12.120005 dan F8.074136 direkomendasikan untuk dilepas., Chili (Capsicum annuum L.) is a horticultural commodity that has high economic value and consumption, so it is important to support the availability of high-yielding varieties by increasing efforts to release candidate varieties generated through plant breeding. This study aims to evaluate the yield of hybrid and non-hybrid test lines of chili pepper IPB and identify the advantages of test lines of chili pepper IPB which will be released into new high yielding varieties. This research was carried out in September 2021 – February 2022 at the Leuwikopo Experimental Garden of IPB and the Plant Breeding Laboratory of IPB. The experimental design applied a single factor Randomized Complete Block Design (RCBD) with chili genotype as the treatment. The genotype treatment consisted of 10 chili genotypes consisting of 1 hybrid test line, 2 non-hybrid test lines, 5 hybrid comparison varieties, and 2 non-hybrid comparison varieties. Each genotype was repeated three times so that there were 30 experimental units. The results showed that the hybrid test lines (F1.074005) and non-hybrid (F12.120005 and F8.074136) had such as flowering age and early harvesting age (21.67-23.67 DAP and 66.3-68 DAP), fruit appearance which is included in SNI I quality, high weight per fruit (6.73 – 10.96 g), large number of fruit per plant (78 – 129 fruit), and high proportion of living plant (88.33 – 96.67 %). The results of the correlation test showed that the potential yield of plants was moderately correlated with the characters of leaf length, fruit thickness, weight per fruit, number of fruit per plant, fruit weight per plant, productivity, and percentage of plant life. The
Keyword: genjah, genotipe, mutu SNI, pembanding, comparison, early maturing, genotype, SNI quality

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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