Judul: Studi Genetik Beberapa Karakter Agronomi pada Terung (Solanum melongena L.)
Abstrak: Eggplant breeding has not been done intensively despite available high genetic diversity, and increased public interest, so it is an opportunity and a challenge to be able to assemble a variety with proper breeding methods. Evaluation on genetic diversity, heritability and correlations between characters in eggplant (Solanum melongena L.) conducted in Kediri, East Java, in January - August 2012 used 30 genotypes collection of PT. BISI International Tbk from Indonesia (8 genotypes), Philippines (5 genotypes), 15 genotypes from China and India (2 genotypes), arranged in Randomized Complete Block Design with 3 replications. The results showed that there was phenotypic variability among 30 eggplant genotypes derived from several source populations. Genotypes from India showed different characters in the age of flowering, fruit length, fruit diameter, fruit weight and number of fruits per plant. There were characters which had high broad sense heritability with high genetic advance i.e. fruit length (92.84%, 43.3%), fruit diameter (68.71%, 45.12%), fruit weight (86.18%, 52.77%), and the number of fruits per plant (62.74%, 47.77%). There were 14 positive and 8 negative significant correlation coefficiens between the main characters. Based on principal component analysis (PCA), combination of PCA I and PCA III gave 42.92% of variability, it separated genotypes into 3 groups, i.e. BEPA05 in group I, BEPE97 in group II and 28 genotypes in group III. . Full diallel cross by Griffing method I made on 8 genotypes (BEP 01, BEP04, BEP 06, BEP 08, BEP 10, BEP11, BEP 12) to test the general combining ability, specific combining ability and genetic parameter. The experiments were performed used 64 genotypes consisted of 28 F1, 28 F1R and 8 parents, used Randomized Complete Block Design with 3 replications in November 2012 - April 2013. Characters of flowering age, harvesting age and fruit weight per plant was affected by the action of a dominant gene because it had specific combining ability value (SCA) higher than the general combining ability (GCA). Plant height, fruit length, fruit diameter, fruit hardness, weight per fruit and number of fruit per plant characters expression was influenced by additive gene action because it had GCA higher than SCA. BEP 04 genotypes have relatively more consistent with SCA and GCA values higher than other genotypes. No interaction of genes on the performance of the characters because the value of b (Wr, Vr) were not significantly different from 1 except fruit weight and number of fruit per plant. The genes distribution for the traits studied unequal on each parents. Fruit length and fruit hardness were controlled by at least one group of genes. Fruit diameter, weight per fruit and number of fruit per plant at least two groups of genes, flowering and plant height were controlled by at least three groups of genes. Harvesting was controlled by at least four groups of genes and the weight of fruit per plant was controlled by at least 5 groups of genes. Broad sense heritability of all the characters were high (h2BS > 50%). All characters had high heritability narrow sense except days to flowering (27%), harvesting (49%), and weight of fruit per
Keyword: eggplant, full diallel analysis, genetic parameters, hybrid evaluation, phenotypics

Judul: Growth and Yield of Several Eggplant Varieties (Solanum melongena L.) in Plastic House
Abstrak: Terung merupakan salah satu komoditas sayuran yang banyak diminati masyarakat. Produktivitas terung nasional juga terus mengalami peningkatan dari tahun ke tahun. Penggunaan varietas unggul merupakan salah satu upaya dalam menjaga kestabilan produksi terung. Penelitian ini bertujuan mengetahui penampilan karakter pertumbuhan dan hasil beberapa varietas terung di rumah plastik. Penelitian dilakukan di rumah plastik Kebun Percobaan Cikabayan, Institut Pertanian Bogor selama bulan Juli hingga November 2023. Penelitian ini menggunakan rancangan kelompok lengkap teracak (RKLT) dengan menggunakan 6 varietas (Hitavi, Garnet, Provita, Mustang, Laguna, dan Torino) dan terdiri atas 4 ulangan. Penggunaan beberapa varietas unggul menunjukkan keragaman pada hasil pengamatan vegetatif dan generatif. Keragaman tersebut terdapat pada karakter diameter batang, panjang daun, lebar daun, dan rata-rata bobot per buah. Diameter batang berkisar antara 2,07 cm (Provita) hingga 2,84 cm (Torino). Panjang daun berkisar antara 42,73 cm (Provita) hingga 52,78 cm (Laguna). Lebar daun berkisar antara 31,48 cm (Provita) hingga 41,45 cm (Torino). Bobot per buah berkisar antara 41,13 g/buah (Provita) hingga 96,75 g/buah (Laguna). Produktivitas tanaman berkisar antara 0,96 kg/tanaman (Provita) hingga 2,53 kg/tanaman (Laguna). Pertumbuhan dan hasil panen yang tidak optimal disebabkan oleh suhu tinggi, serangan hama kutu putih serta tungau merah pada tanaman., Eggplant is a vegetable crop in great demand. National eggplant productivity continues to increase from year to year. The use of superior varieties is needed to maintain the stability of eggplant production. This research aims to determine the growth characteristics and yields of several eggplant varieties in the plastic house. The research was conducted in the plastic house of the Cikabayan Experimental Station, Bogor Agricultural University from July to November 2023. It used a randomized complete block design using 6 varieties (Hitavi, Garnet, Provita, Mustang, Laguna, and Torino) and replicated 4 times. The use of several superior varieties showed variability in vegetative and generative characters. The variability was found in the characters of stem diameter, leaf length, leaf width, and average weight per fruit. Stem diameters ranged from 2.07 cm (Provita) to 2.84 cm (Torino). Leaf length ranged from 42.73 cm (Provita) to 52.78 cm (Laguna). Leaf width ranged from 31.48 cm (Provita) to 41.45 cm (Torino). The weight per fruit ranged from 41.13 g/fruit (Provita) to 96.75 g/fruit (Laguna). Plant productivity ranged from 0.96 kg/plant (Provita) to 2.53 kg/plant (Laguna). Suboptimal growth and crop yields were caused by high temperatures and attacks of mealybugs and red mites on plants, so the cultivation environmental conditions and selection of superior varieties need to be considered in order to obtain optimal yields
Keyword: Characterization, eggplant, plastic house, varieties

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.
Keyword: