Judul: Morphological and Productivity Analysis of the Second Generation of Curly Chili Mutants (Capsicum annuum L.) Resulting from Gamma-Ray Irradiation
Abstrak: Cabai (Capsicum annuum L.) merupakan komoditas hortikultura yang banyak dibudidayakan untuk keperluan industri makanan maupun kesehatan. Salah satu faktor yang mempengaruhi produktivitas cabai adalah kondisi iklim. Pemuliaan tanaman cabai dilakukan guna mendapatkan varietas yang tahan terhadap cekaman lingkungan untuk memenuhi kebutuhan cabai di masyarakat. Salah satu upaya untuk merakit varietas cabai unggul dapat melalui iradiasi sinar gama. Penelitian dilakukan bulan Oktober 2023-April 2024 di kebun Percobaan PKHT IPB Pasir Kuda. Penelitian menggunakan rancangan kelompok lengkap teracak (RKLT) 3 ulangan dengan faktor tunggal yaitu genotipe. Hasil penelitian menunjukkan bahwa produktivitas genotipe uji HTCkr-1, HTCkr-11, dan HTCkr 2 memiliki potensi produktivitas yang tinggi meskipun tidak memiliki perbedaan signifikan terhadap varietas pembanding. Hasil produksi belum mencapai produktivitas nasional akibat faktor cekaman lingkungan yang cukup ekstrem. Pengamatan karakter kualitatif tidak menunjukkan variasi fenotipe pada seluruh genotipe uji. Analisis korelasi menunjukkan produktivitas cabai keriting memiliki hubungan positif yang sangat nyata terhadap karakter umur berbunga, umur panen, tinggi tanaman, tinggi dikotomus, diameter batang, lebar tajuk, diameter buah, bobot per buah, jumlah biji per buah, jumlah buah per tanaman, bobot buah per tanaman, dan bobot buah per petak., Chili pepper (Capsicum annuum L.) is a horticultural commodity widely cultivated for the food and health industries. One factor affecting chili productivity is climate conditions. Chili plant breeding is conducted to develop varieties that are resistant to environmental stress to meet the community's chili needs. One approach to developing superior chili varieties is through gamma-ray irradiation. The research was carried out from October 2023 to April 2024 at the PKHT IPB Pasir Kuda Experimental Field. The study used a randomized complete block design (RCBD) with three replications and a single factor, namely genotype. The results showed that the productivity of the tested genotypes HTCkr-1, HTCkr-11, and HTCkr-2 had high productivity potential, although there were no significant differences compared to the control variety. The production results of this research had not reached national productivity levels due to the quite extreme environmental stress factors. Observations of qualitative characteristics did not show phenotypic variation in all tested genotypes. Correlation analysis showed that the productivity of curly chili had a highly significant positive relationship with the traits of flowering age, harvest age, plant height, dichotomous height, stem diameter, canopy width, fruit diameter, fruit weight per fruit, number of seeds per fruit, number of fruits per plant, fruit weight per plant, and fruit weight per plot.
Keyword: correlation, Genotype, character

Judul: Yield Test and Performance Evaluation Lines of Curly Chili (Capsicum  annuum L.) IPB
Abstrak: Cabai merupakan salah satu sayuran terpenting di Indonesia. Kebutuhan cabai meningkat setiap tahunnya, sehingga perlu adanya perbaikan kualitas dan produktivitas cabai. Penelitian ini bertujuan menguji daya hasil dan mengevaluasi keragaan tujuh galur harapan cabai keriting IPB. Penelitian ini menggunakan rancangan percobaan kelompok lengkap teracak (RKLT) faktor tunggal yaitu genotipe. Penelitian ini menggunakan sebanyak tujuh galur harapan cabai keriting dan tiga varietas pembanding komersial diulang sebanyak tiga kali ulangan sehingga terdapat 30 satuan percobaan. Hasil penelitian menunjukan bahwa genotipe cabai keriting memiliki pengaruh yang nyata terhadap seluruh karakter kuantitatif kecuali umur berbunga dan persentase hidup. Galur G1 (15,55 ton ha-1 ), G2 (15,82 ton ha-1 ), G3 (13,99 ton ha-1 ), G4 (14,79 ton ha-1 ), G5 (19,08 ton ha-1 ), dan SSP (14,75 ton ha-1 ) memiliki produktivitas nyata lebih tinggi dibandingkan varietas pembanding. Galur G1 (81 HST), G2 (81 HST), G3 (86 HST), G4 (81 HST), G5 (79 HST), F6 110005-9-6 (78 HST), dan SSP (80 HST) memiliki umur yang lebih genjah dibandingkan varietas komersial. Pendaftaran untuk varietas komersialisasi potensial dilakukan pada galur harapan G1, G2, G3, G4, dan G5, karena memiliki keunggulan berupa daya hasil dan keragaan yang berbeda dengan varietas pembanding komersial., Chili is one of the most important vegetables in Indonesia. The need for chili increases every year, so it is necessary to improve the quality and productivity of chili. This study aims to test the yield and evaluate the performance of seven promising lines of curly chili IPB. This study used a randomized complete group experimental design with a single factor, namely genotype. This study used seven promising curly chili lines and three commercial comparison varieties, repeated three times so that there were 30 experimental units. The results showed that the curly chili genotype had a significant effect on all quantitative characters except flowering age and live percentage. Lines G1 (15,55 ton ha-1 ), G2 (15,82 ton ha-1 ), G3 (13,99 ton ha-1 ), G4 (14,79 ton ha-1 ), G5 (19,08 ton ha-1 ), and SSP (14,75 ton ha-1 ) had significantly higher productivity than the comparison varieties. The lines G1 (81 DAP), G2 (81 DAP), G3 (86 DAP), G4 (81 DAP), G5 (79 DAP), F6 110005- 9-6 (78 DAP), and CNS (80 DAP) had a lifespan of which are more mature than commercial varieties. Registration for potential commercialized varieties was carried out on the promising lines G1, G2, G3, G4, and G5, because they had advantages in terms of yield and performance that were different from commercial comparison varieties.
Keyword: keragaan, keunggulan,, produktivitas, umur genjah, 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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