Judul: Horticulture characters evaluation of IPB ornamental pepper lines at the leuwikopo experimental field
Abstrak: Penelitian ini bertujuan untuk mengevaluasi beberapa sifat vegetatif dan generatif dari galur cabai hias baru IPB. Penelitian ini dilaksanakan di Kebun Percobaan Leuwikopo, Dramaga, Bogor pada bulan Januari hingga Juli 2014. Bahan tanam yang digunakan adalah dua galur cabai hias IPB yaitu Seroja dan Ungara serta tiga varietas pembanding yaitu Explosive, Numex, dan Bara. Penelitian menggunakan Rancangan Kelompok Lengkap Teracak (RKLT) dengan empat ulangan. Hasil penelitian menunjukkan galur-galur yang diuji memiliki perbedaan pada semua karakter kuantitatif yang diuji. Galur Ungara memiliki keunggulan pada karakter tinggi tanaman, diameter batang, bobot per buah, diameter buah, dan ketebalan kulit buah. Galur Seroja memiliki keunggulan pada karakter umur berbunga dan umur panen buah yang lebih cepat. Karakter-karakter kualitatif antara galur-galur yang diuji tidak menunjukkan banyak perbedaan dengan pembandingnya. Karakter kualitatif yang dapat mencirikan masingmasing galur dapat dilihat dari karakter pemendekan ruas dan perubahan warna buah. Karakter pemendekan ruas dimiliki oleh galur Seroja. Perubahan warna buah muda ke buah masak pada galur Seroja adalah dari hijau kekuningan ke merah, sementara pada galur Ungara dari ungu kehitaman ke merah., The objective of this research was to evaluate several vegetative and generative characters of the new IPB ornamental pepper lines. The experiment was conducted at IPB experimental field, Leuwikopo, Dramaga, Bogor in January to July 2014. Planting material used was two IPB ornamental pepper lines, namely Seroja and Ungara, and three control varieties, namely Explosive, Numex, and Bara. The design used was a randomized complete block design with four replications. The results showed that there are significant differences for all quantitative characters among the observed new lines of ornamental pepper. Ungara had higher plant height, stem diameter, weight per fruit, fruit diameter, and flesh thickness than the control varieties. Seroja had earlier flowering time and harvest time than the control varieties. The qualitative characters between the observed lines and the control varieties are similar. Seroja line showed a shortened internode which is the same as one of the control varieties Explosive. In colour changes during ripening, Seroja line is yellowish-green when the fruits are immature and finally red when its mature. Ungara line start out deep purplish black and then turn green before maturing to red.
Keyword: cabai hias, generatif, Seroja, Ungara, vegetatif

Judul: Yield Performance Evaluation of Hybrid and Non Hybrid Lines of Chili Pepper (Capsicum annuum L.) for New Variety Release
Abstrak: Cabai (Capsicum annuum L.) merupakan komoditas hortikultura yang bernilai ekonomi dan konsumsi yang tinggi, sehingga perlu dukungan ketersediaan varietas unggul dengan meningkatkan upaya pelepasan varietas atas kandidat varietas hasil pemuliaan tanaman. Penelitian ini bertujuan untuk mengevaluasi daya hasil galur hibrida dan non hibrida cabai besar IPB serta mengidentifikasi keunggulan galur uji cabai besar IPB yang akan dilepas menjadi varietas unggul baru. Penelitian ini dilaksanakan pada bulan September 2021 – Februari 2022 di Kebun Percobaan Leuwikopo IPB dan Laboratorium Pemuliaan Tanaman IPB. Rancangan percobaan yang digunakan adalah Rancangan Kelompok Lengkap Teracak (RKLT) faktor tunggal dengan genotipe cabai sebagai perlakuan. Perlakuan genotipe terdiri dari 10 genotipe cabai yang terdiri dari 1 galur uji hibrida, 2 galur uji non hibrida, 5 varietas pembanding hibrida, dan 2 varietas pembanding non hibrida. Setiap genotipe diulang sebanyak tiga kali sehingga terdapat 30 satuan percobaan. Hasil penelitian menunjukkan bahwa galur uji hibrida (F1.074005) maupun non hibrida (F12.120005 dan F8.074136) memiliki keunggulan seperti umur berbunga dan umur panen tergolong genjah (21,67-23,67 HST dan 66,3-68 HST), penampilan buah yang termasuk ke dalam mutu I SNI, bobot per buah tinggi (6,73 – 10,96 g), jumlah buah per tanaman banyak (78 – 129 buah), dan persentase hidup tinggi (88,33 – 96,67 %). Hasil uji korelasi menunjukkan bahwa potensi hasil tanaman berkorelasi sedang dengan karakter panjang daun, ketebalan buah, bobot per buah, jumlah buah per tanaman, bobot buah per tanaman, produktivitas, dan persentase hidup tanaman. Galur hibrida F1.074005, dan dua galur non hibrida F12.120005 dan F8.074136 direkomendasikan untuk dilepas., Chili (Capsicum annuum L.) is a horticultural commodity that has high economic value and consumption, so it is important to support the availability of high-yielding varieties by increasing efforts to release candidate varieties generated through plant breeding. This study aims to evaluate the yield of hybrid and non-hybrid test lines of chili pepper IPB and identify the advantages of test lines of chili pepper IPB which will be released into new high yielding varieties. This research was carried out in September 2021 – February 2022 at the Leuwikopo Experimental Garden of IPB and the Plant Breeding Laboratory of IPB. The experimental design applied a single factor Randomized Complete Block Design (RCBD) with chili genotype as the treatment. The genotype treatment consisted of 10 chili genotypes consisting of 1 hybrid test line, 2 non-hybrid test lines, 5 hybrid comparison varieties, and 2 non-hybrid comparison varieties. Each genotype was repeated three times so that there were 30 experimental units. The results showed that the hybrid test lines (F1.074005) and non-hybrid (F12.120005 and F8.074136) had such as flowering age and early harvesting age (21.67-23.67 DAP and 66.3-68 DAP), fruit appearance which is included in SNI I quality, high weight per fruit (6.73 – 10.96 g), large number of fruit per plant (78 – 129 fruit), and high proportion of living plant (88.33 – 96.67 %). The results of the correlation test showed that the potential yield of plants was moderately correlated with the characters of leaf length, fruit thickness, weight per fruit, number of fruit per plant, fruit weight per plant, productivity, and percentage of plant life. The
Keyword: genjah, genotipe, mutu SNI, pembanding, comparison, early maturing, genotype, SNI quality

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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