Judul: Analysis of Variability and Heritability Value of F3 Population Crossed Chilli
Abstrak: Cabai besar (Capsicum annuum L.) merupakan salah satu komoditas hortikultura yang banyak diminati di Indonesia. Namun, data menunjukkan ratarata produktivitas cabai besar di Indonesia masih belum maksimal. Penelitian dilakukan dengan tujuan menganalisis keragaman genetik, nilai heritabilitas, seleksi, dan kemajuan seleksi pada populasi F3 persilangan berbagai cabai besar. Penelitian dilakukan di kebun percobaan Leuwikopo IPB dan Laboratorium Genetika dan Pemuliaan Tanaman, Departemen Agronomi dan Hortikultura IPB. Penelitian berlangsung dari bulan September 2021 hingga Maret 2022. Penelitian ini menggunakan lima populasi F3 persilangan cabai besar yaitu F3 317375-3, F3 375078-1, F3 375 x F6 074136-1, F3 374078-3, dan F3 074078-7, masing-masing ditanam sebanyak 60 tanaman. Pendugaan ragam lingkungan dilakukan melalui penanaman tiga populasi cabai besar yang homozigot homogen yaitu varietas Anies IPB, varietas Arisa IPB, dan galur murni IPB C074, masing-masing ditanam 60 tanaman. Hasil penelitian menunjukkan bahwa terdapat keragaman genetik yang bervariasi pada karakter tanaman dan antar populasi F3. Karakter umur berbunga, tinggi tanaman, diameter batang, diameter buah, dan bobot per buah, memiliki nilai heritabilitas yang tinggi (0,51-0,81), sementara pada karakter umur panen, tinggi dikotomus, panjang buah, jumlah buah per tanaman, dan bobot buah per tanaman memiliki nilai heritabilitas yang rendah (0,20-0,48). Penelitian menunjukkan terdapat variasi nilai kemajuan seleksi karakter antar tanaman dan antar populasi F3., Chilli (Capsicum annuum L.) is one of the most popular horticultural commodities in Indonesia. Howeres, the data shows that the average productivity of chillies is still not optimal. This problem can be overcome through plant breeding. This study aimed to analyse genetic variability, heritability value, selection, and genetic advance of the F3 populations of chilli. This research was conducted at the experimental field in Leuwikopo IPB, and at Genetic and Plant Breeding Laboratory, Department of Agronomy and Horticulture, IPB. The research was done from September 2021 to March 2022. This research used five populations of F3 crossed chilli, such as F3 317375-3, F3 375078-1, F3 375 x F6 074136-1, F3 374078-3, and F3 074078-7. Each populations was plant 60 plants. Estimation of environmental variance was conducted by planting three homogeneous homozygous populations of chillies, there are the Anies IPB, Arisa IPB, and IPB C074 pure line, that contains 60 plants each populations. The results showed that there was variation in genetic diversity in plant characters and between F3 populations. Characters of flowering date, plant length, stem diameter, fruit diameter, and weight per fruit, showed high variability values (0,51-0,81), while the characters of harvesting date, dichotomous length, fruit length, number of fruits per plant, and weight of fruit per plant showed a low heritability values (0,20-0,48). The study showed that there were variations in the value of selection between plants and between F3 populations.
Keyword: Chilli, heritability value, selection, variability value, Chilli, heritability value, selection, variability value

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.
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