Judul: Analysis of Variations in PKHT IPB’s Cayenne Pepper Genotypes Collected from Blitar
Abstrak: Cabai rawit (Capsicum frutescens L.) merupakan salah satu komoditas yang dibudidayakan secara luas dan bernilai ekonomi tinggi di Indonesia. Tingginya permintaan cabai rawit mendorong upaya untuk meningkatkan produktivitas tanaman. Perakitan varietas baru merupakan salah satu upaya untuk meningkatan hasil. Salah satu tahap awal dari perakitan varietas baru yaitu eksplorasi dan karakterisasi plasma nutfah. Tujuan dari penelitian ini adalah mengkarakterisasi keragaman fenotipe cabai rawit aksesi Blitar koleksi PKHT IPB berdasarkan karakter morfologi dan daya hasil. Penelitian dilaksanakan dari bulan Desember 2020 hingga Juli 2021 di Kebun Percobaan Pasir Kuda. Penelitian ini menggunakan rancangan kelompok lengkap teracak (RKLT) satu faktor, yaitu genotipe cabai rawit dan diuji lanjut dengan Tukey Beda Nyata Jujur. Hasil penelitian menunjukkan adanya keragaman pada 20 karakter kualitatif dan seluruh karakter kuantitatif yang diamati. Perbedaan karakter kualitatif genotipe uji dengan varietas pembanding terdapat pada warna daun, posisi buah, dan bentuk potongan membujur buah. Hasil analisis sidik ragam menunjukkan bahwa genotipe berpengaruh nyata terhadap semua karakter kuantitatif yang diamati. KCR5 dan KCR7 memiliki bobot buah per tanaman yang lebih tinggi dibanding varietas pembanding, Cayenne pepper (Capsicum frutescens L.) is one of the most widely cultivated and economically important commodities in Indonesia. The high demand for cayenne pepper has spurred efforts for higher-yielding crops. Breeding a new cultivar is one of the efforts to increase plant productivity. One of the early stages of breeding a new cultivar is germplasm exploration and characterization. The objective of this research was to characterize the phenotypic variation among PKHT IPB’s cayenne pepper collected from Blitar based on morphological traits and yield components. The research was carried out from December 2020 to July 2021 at PKHT IPB Pasir Kuda Experimental Station. The experiment was performed using single factor cayenne pepper genotypes under a randomized complete block design (RCBD), subsequently, Tukey’s Honest Significant Difference test was used to reveal differences among genotypes. The results showed there were variations in 20 qualitative and all quantitative characters. Differences in qualitative characteristics between the commercial cultivar used as a comparison and tested genotypes are in leaf color, fruit position, and fruit shape in the longitudinal section. Analysis of variance revealed that genotype has a significant effect on all observed quantitative characters. KCR5 and KCR7 have a higher yield than the commercial cultivar used in this experiment.
Keyword: bobot, daya hasil, karakterisasi, morfologi, pemuliaan

Judul: Growth and Yield Evaluation of IPB Cayenne Pepper Capsicum annnum L. and Capsicum frutescens L.
Abstrak: Cabai rawit merupakan salah satu komoditas hortikultura yang penting dan mempunyai nilai ekonomi tinggi bagi masyarakat Indonesia. Tujuan penelitian ini adalah untuk mengevaluasi pertumbuhan dan daya hasil genotipe-genotipe cabai rawit spesies Capsicum annuum L. dan Capsicum frutescens L. Rancangan percobaan yang digunakan adalah rancangan kelompok lengkap teracak (RKLT) satu faktor dengan tiga ulangan. Bahan tanam yang digunakan adalah lima genotipe cabai rawit Capsicum annuum L. (F12.145291-10-7-1-1-2-1-3-6-1-3, F13.160291-3-12-5-51-1-1-2-2-1-1-5, F9.145291-14-9-3-12-1-1-2, serta varietas pembanding komersil Bara dan Genie) dan tujuh genotipe cabai rawit Capsicum frutescens L. (F1.285290, F1.340290, F1.372340, F1. 373340, Shadiva, serta varietas pembanding komersil Rawita F1 dan Bonita). Galur F9.145291-14-9-3- 12-1-1-2 memiliki panjang buah, tebal daging buah, bobot per buah, serta bobot buah per tanaman yang lebih tinggi daripada varietas pembanding. Galur F12.145291-10-7-1-1-2-1-3-6-1-3 memiliki diameter buah, bobot per buah, dan bobot buah per tanaman yang lebih tinggi dari varietas pembanding. Hibrida F1.285290 memilliki jumlah buah per tanaman yang jauh lebih banyak dibandingkan dengan varietas pembanding. Galur uji Shadiva memiliki bobot per buah yang lebih baik daripada varietas pembanding., Cayenne pepper is one of the important horticultural commodities and has high economic value for the people of Indonesia. The aim of the experiment was to evaluate the growth and yield of cayenne pepper genotypes of Capsicum annuum L. and Capsicum frutescens L. species. The experimental design used was a onefactor randomized complete block design (RCBD) with three replications. Plant materials that used were five genotypes of cayenne pepper Capsicum annuum L. (F12.145291-10-7-1-1-2-1-3-6-1-3, F13.160291-3-12-5-51-1-1-2-2-1-1-5, F9.145291-14-9-3-12-1-1-2, and commercial comparison varieties Bara and Genie) and seven genotypes of cayenne pepper Capsicum frutescens L. (F1. 285290, F1.340290, F1.372340, F1.373340, Shadiva, and commercial comparison varieties Rawita F1 and Bonita). The F9.145291-14-9-3-12-1-1-2 line produced higher fruit length, flesh thickness, weight per fruit, and fruit weight per plant than the comparison varieties. The F12.145291-10-7-1-1-2-1-3-6-1-3 line had higher fruit diameter, weight per fruit, and fruit weight per plant than the comparison varieties. The F1.285290 hybryd had much higher number of fruits per plant than the comparison variety. Shadiva test line had a better weight per fruit compared to comparison variety.
Keyword: cayenne pepper, genotype, variety, vegetable, yield

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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