Judul: Induction of Character Diversity of PKHT-CR1 Genotypes of Cayenne Paper (Capsicum annuum L.) through Gamma Ray Iradiation
Abstrak: Cabai merupakan komoditas hortikultura dengan peran penting dalam perekonomian. Produksi yang stabil dan tinggi dapat diperoleh melalui varietas unggul. Penelitian ini bertujuan memperoleh keragaman daya hasil dan karakter kualitatif mutan cabai CR1. Rancangan percobaan penelitian ini adalah Rancangan Kelompok Lengkap Teracak (RKLT) dengan satu faktor yaitu dosis radiasi gamma. Penelitian terdiri atas 4 taraf perlakuan dengan masing-masing 3 ulangan. Hasil penelitian menunjukkan bahwa seluruh perlakuan iradiasi sinar gamma tidak berpengaruh nyata terhadap semua karakter yang diamati. Dosis iradiasi 100 Gy, 150 Gy, dan 200 Gy tidak menunjukkan perubahan nilai rata-rata semua karakter secara signifikan. Hasil pengamatan keragaman dosis 100 Gy, 150 Gy, dan 200 Gy menghasilkan keragaman karakter bobot per buah, bobot buah per tanaman dan jumlah buah per tanaman yang tinggi. Perlakuan dosis 150 Gy menghasilkan tiga individu tanaman dengan karakter bobot per buah yang tinggi. Perlakuan dosis 200 Gy menghasilkan empat individu tanaman dengan karakter bobot buah per tanaman dan tiga individu tanaman dengan karakter jumlah buah per tanaman yang tinggi, Chili is a horticultural commodity with an important role in the economy. Stable and high production can be obtained through superior varieties. This study aims to obtain the diversity of yield and qualitative characteristics of CR1 chilli mutants. The experimental design of this study was a completely randomized block design (RKLT) with one factor, namely the dose of gamma radiation. The study consists of four levels of treatment with three replications each. The results showed that all gamma irradiation treatments had no significant effect on all the observed characters. Irradiation doses of 100 Gy, 150 Gy, and 200 Gy did not significantly change the average value of all characters. Results observation of the variation in doses of 100 Gy, 150 Gy, and 200 Gy resulted in a high diversity of characters in weight per fruit, fruit weight per plant, and number of fruits per plant. The 150 Gy dose treatment produced three plants with a high weight per fruit character. The 200 Gy dose treatment produced four plants with the character of fruit weight per plant and three with a high number of fruits per plant.
Keyword: Chili,, gamma irradiation, mutation induction

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: 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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