Judul: Uji Daya Hasil dan Evaluasi Keragaan Sepuluh Galur Harapan Tanaman Cabai Besar (Capsicum annuum L.) IPB
Abstrak: Cabai besar (Capsicum annuum L.) merupakan salah satu komoditas hortikultura terpenting yang banyak dibudidayakan dan dikonsumsi oleh masyarakat Indonesia. Hal ini menjadikan pemuliaan tanaman cabai perlu terus dilakukan terutama dalam menghadapi tantangan perubahan iklim dan peningkatan manusia yang pesat. Penelitian ini bertujuan mengevaluasi daya hasil dan keragaan dari sepuluh galur harapan cabai besar IPB. Penelitian dilaksanakan pada September 2022 hingga Maret 2023 di Kebun Percobaan Leuwikopo IPB dan Laboratorium Pemuliaan Tanaman, IPB Dramaga, Bogor, Jawa Barat. Penelitian ini menggunakan rancangan kelompok lengkap teracak (RKLT) faktor tunggal dengan tiga ulangan. Bahan tanam yang digunakan terdiri dari sepuluh galur harapan IPB dengan tiga varietas pembanding yaitu Arisa IPB, Anies IPB, dan Seloka IPB. Hasil penelitian menunjukkan bahwa perlakuan genotipe berpengaruh nyata terhadap seluruh karakter yang diamati kecuali diameter batang. Galur cabai besar yang diuji memiliki potensi untuk dilepas menjadi varietas unggul baru karena menunjukkan hasil yang sama atau lebih baik dari varietas pembanding. Dari kesepuluh galur yang diuji, galur F4.317375-3-1 berpotensi untuk menjadi calon varietas unggul baru karena memiliki jumlah buah total per tanaman yang banyak (70,46 buah), bobot buah total per tanaman yang tinggi (483,71 g), umur berbunga (30 HST) dan umur panen (75 HST) yang cepat, produktivitas tanaman tinggi (9,5 ton ha-1), potensi hasil tinggi (16,32 ton ha-1) yang setara atau lebih baik dari varietas pembanding., Chili pepper (Capsicum annuum L.) is one of the most important horticultural commodities cultivated and consumed by the Indonesian people. This makes the breeding of chili pepper plants an ongoing necessity, especially in the face of the challenges posed by climate change and rapid population growth. This research aims to evaluate the yield and performance of teen lines chili pepper IPB. The research was carried out from September 2022 to March 2023 at the Leuwikopo Experimental Garden of IPB and Plant Breeding Laboratory, IPB Dramaga, Bogor, West Java. This study used a Randomized Complete Block Design (RCBD) with a single factor and three replications. The plant material consisted of teen lines IPB and three comparison varieties of chili were Arisa IPB, Anies IPB, and Seloka IPB. The results of the study showed that the genotype treatment had a significant effect on all observed traits except stem diameter. The tested chili pepper lines demonstrated potential for release as new superior varieties, as they exhibited similar or better performance compared to the reference varieties. Among the teen tested lines, F4.317375-3-1 showed potential as a candidate for a new superior variety due to its high total fruit yield per plant (70.46 fruits), total fruit weight per plant (483.71 g), early flowering (30 DAS), early harvest (75 DAS), high plant productivity (9.5 tons/ha), and high yield potential (16.32 tons/ha), which were either equivalent or better than the reference varieties
Keyword: cabai besar, evaluasi, galur, karakter, varietas pembanding

Judul: Yield Test and Performance  Evaluation of Hybrid and Non Hybrid Lines of Big Chili (Capsicum annuum L.)  IPB
Abstrak: Cabai (Capsicum annuum L.) merupakan komoditas hortikultura yang memiliki nilai ekonomi tinggi dan banyak dimanfaatkan oleh masyarakat di Indonesia untuk kebutuhan rumah tangga maupun industri. Penelitian ini bertujuan untuk mengevaluasi daya hasil dan keragaan galur hibrida dan non hibrida cabai besar IPB. Penelitian ini dilaksanakan pada bulan September 2020 hingga Februari 2021 di Kebun Percobaan Leuwikopo IPB dan Laboratorium Pemuliaan Tanaman IPB. Rancangan percobaan yang digunakan adalah rancangan kelompok lengkap teracak (RKLT) dengan faktor tunggal yaitu genotipe. Jumlah genotipe yang digunakan terdiri atas 6 galur cabai besar IPB (5 galur non hibrida dan 1 galur hibrida) dan 4 varietas pembanding (2 varietas non hibrida dan 2 varietas hibrida) yang diulang sebanyak 3 ulangan sehingga terdapat 30 satuan percobaan. Hasil penelitian menunjukkan bahwa genotipe cabai besar memiliki pengaruh yang nyata pada karakter tebal daging buah dan lebar tajuk, tidak berpengaruh nyata pada karakter persentase tanaman hidup dan berpengaruh sangat nyata untuk karakter lainnya. Galur hibrida F1.074 x 005 memiliki umur panen yang genjah, yaitu 69–70 HST, sehingga berpotensi didaftarkan sebagai varietas baru. Galur hibrida F1.074 x 005 (19,84 ton ha-1), galur non hibrida F7. 074136–2–3–2–3–2 (12,87 ton ha-1), F6. 074077–173–1 (12,66 ton ha-1), dan F7. 136074–1–4–3–1–9 (12,14 ton ha-1) berpotensi didaftarkan sebagai varietas baru karena memiliki daya hasil yang setara/lebih baik serta keragaan yang berbeda dengan varietas pembanding., Chili (Capsicum annuum L.) is a horticultural commodity that has high economic value and is widely used by people in Indonesia for household and industrial needs. This research aimed to evaluate the yield and performance of non hybrid and hybrid lines of big chili IPB. The research was conducted in September 2020 until March 2021 at Teaching Farm Leuwikopo and Plant Breeding Laboratory IPB. The design used was a randomized complete block design (RCBD) with a single factor, namely genotype. The number of genotypes used consisted of 6 lines of large chili IPB (5 non hybrid lines and 1 hybrid line) and 4 comparison varieties (2 non hybrid varieties and 2 hybrid varieties) with 3 repetitions. Thus, there was total 30 experimental units. The research outcome showed that the big chili lines had a significant effect on flesh thickness and crown width, had no significant effect on the percentage of live and had a very significant effect on other characters. The F1.074 x 005 hybrid line had an early harvest age of 69 70 DAP, so that it had the potential to be registered as a new variety. Hybrid line F1.074 x 005 (19,84 ton ha-1), non hybrid lines F7. 074136–2–3–2–3–2 (12,87 ton ha-1), F6. 074077–1–7–3–1 (12,66 ton ha-1), dan F7. 136074–1–4–3–1–9 (12,14 ton ha-1) has the potential to be registered as a new variety because it has the same/better yield and different performances from the comparison varieties.
Keyword: hibrida, karakter, keragaan, produktivitas, varietas unggul

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.
Keyword: