Judul: Pewarisan Karakter Morfologis dan Agronomis pada Persilangan Antara Cabai Besar dan Cabai Keriting (Capsicum annuum L.)
Abstrak: Pepper productivity of Indonesia is 6.3 ton/ha in 2008, which could be increased up to 12-20 ton/ha. One of strategy to improve productivity is development of superior variety via hybridization and selection process that need information of inheritance pattern and heritability value. This research studied the pattern of inheritance of morphologic and agronomic traits in the crossing of double haploid of big pepper (Tit-Super) and curly pepper (Laris), F1, and F2 population. Morphologic traits that included main stem color, node color, flower position, leaf color, leaf shape, and plant growth habit were segregating in F2 TS x LR population. Each trait was controlled by at least two genes. Agronomic traits that included 30 days after planting height, days to flowering, days to fruiting, plant height, main stem length, fruit diameter, fruit weight, and number of seed per unit fruit were segregating with high variability. It was indicated that the traits were controlled by poly genes. Based on agronomic trait: fruit per plant, fruit diameter, and fruit weight which have higher viability and heritability value (>82.9%) could be selected ten individual from 99 plants with high index selection from F2 TS x LR population
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Judul: Keragaan Sifat Morfologis dan Agronomis Calon Varietas Hibrida Cabai (Capsisum annuum L.) pada pertanaman di Lahan Petani Sukabumi.
Abstrak: Hot pepper (Capsicum annuum L.) is one of the important vegetable in Indonesia, but it’s production is still unoptimum. An alternative solution to increase hot pepper productivity is by developing and using superior hybrid varieties. The aims of this research were to describe morphological and agronomical characters of some potential hybrid varieties and to estimate their production. The experiment was conducted by using Randomized Block Design with one treatment (pepper’s genotype) and the blocks were prepared as triplicate. The result showed that there were diversity on morphological traits especially for the character of leave, stem, and habitus. There were also diversity in agronomical traits i.e. the number of fruits per plants, fruit weight per plant, the diameter of fruit, fruit length, and the number of seeds per fruit. Hybrid of LR x GD1 showed the highest number fruit per plant, fruit weight per plant, and plant height. Hybrid of GD2 x CD1 showed the highest value in diameter and length of fruit, and the number of seeds per fruit. Based on estimation of the productivity, LR x GD1 (9,50 ton/ha), CJ x CD1 (9,40 ton/ha), and GD2 x CD2 (8,02 ton/ha) are the potential hybrids with high production. LR x GD1 and CJ x CD1 have curly fruit type, whereas GD2 x CD2 has big fruit type. They have erect plant growth habit.
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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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