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: Heterosis dan Daya Gabung pada Persilangan HalfDiallel Cabai Besar dan Cabai Keriting (Capsicum annuum L.)
Abstrak: The aim of this research was to study estimation the heterosis and heterobeltiosis of fifteen hybrids, the general combining ability (GCA), and the specific combining ability (SCA) of six chili inbred lines of hybridization between big and curly pepper (Capsicum annuum L.). This research was conducted at Genetic and Plant Breeding Laboratory and IPB Experimental Field, Leuwikopo, Dramaga, Bogor, from September 2012 to March 2013. The experimental design used was randomized complete block design (RCBD) single factor with three replication. Plant materials were six chili inbred lines, fifteen hybrids from hybridization half diallel crosses, and two commercial hybrids. Genotype IPB C159 x IPB C120, IPB C159 x IPB C111, IPB C159 x IPB C5, IPB C120 x IPB C5, IPB C111 x IPBC2, IPB C19 x IPB C5, and IPB C5 x IPB C2 had positive heterosis, heterobeltiosis, and SCA values for some variables observed. All these genotypes had advantages that were better than the comparison of varieties TM 999 and Gada on some characters observed
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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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