Judul: Karakterisasi Morfologi Beberapa Genotipe Melon (Cucumis melo L.) Grup Cantalupensis dan Inodorus
Abstrak: Melon is one horticulture commodity with high economic value and large morphological diversity. The aims of this research was to elucidate genetic diversity of 16 melon genotypes based on morphological characteristics, and to identify potential genotypes for further utilization in a plant breeding program. This research was conducted at IPB Tajur II experimental station, Bogor, from December 2014 to March 2015. The genotypes used in this research consisting of 15 melon genotypes from the Center for Tropical Horticulture Studies IPB and 1 check variety (Ivory). The experiment was arranged in a randomized complete block design with single factor and three replicates. The analysis of variance showed that the genotypic effects were significant for all observed traits, except for days to hermaprodite flowering and flesh thickness. Characters having broad sense heritability value > 50% were stem diameter, leaf length, leaf width, days to harvest, fruit weight, sugar content, fruit length, fruit diameter, and flesh thickness. The SMM genotype has the highest sugar content, while the average weight of G8 fruits is similar to Ivory as a check variety. Correlation analysis showed that the fruit weight has positive correlation with fruit diameter, flesh thickness, leaf width, fruit rind thickness, stem diameter, and leaf length. Clustering based on morphological characteristics generally showed that the genetic dissimilarity among cultivar groups (cantalupensis and inodorus) is greater than teh dissimilarity among genotypes within each group.
Keyword: Bogor Agricultural University, broad sense heritability, characterisation, melon, correlation, diversity

Judul: Seleksi Beberapa Genotipe Melon Cantalupensis (Cucumis melo L. var. reticulatus) di Dua Musim Tanam.
Abstrak: The diversity of melon types in the markets and the availability of locallyproduced melon seeds are still relatively limited, therefore breeding for new melon varieties is promising. This study aimed to evaluate the horticultural characteristics of several cantaloupe melon genotypes (Cucumis melo L. var. reticulatus) and to identify potential genotypes. The experiment was conducted in two cropping seasons, i.e. September to December 2014 in the village of Cibeureum, Mulyaharja, Bogor, and January to March 2015 at the PKHT IPB Tajur II experimental station, Bogor. The study was conducted using a single factor randomized complete block designwith 10 genotypes and three replications in each season. There was considerable diversity among the melon genotypes for all traits except for days to hermaphrodite flowering. Traits with high broad sense heritability are leaf width, fruit diameter, fruit weight, and rind thickness. Genotypes selected from the second season based on fruit weight and sugar content are H94XMRE, R2, and AFAXPAS. Cluster analysis showed that all evaluated genotypes except R5 are grouped together. The selected genotypes have a level of similarity with Eldorado and Emerald Jewel varieties and can be utilized as potential genetic sources in a melon breeding program.
Keyword: cluster analysis, netted melon, randomized complete block design, selection index

Judul: Pemanasan Sekunder Reaksi Fusi Plasma dengan Menggunakan Radio Frequency
Abstrak: Plasma merupakan bentuk ke-empat dari materi setelah padat, cair dan gas yang terbentuk dari proses ionisasi gas. Plasma dapat digunakan dalam reaksi fusi, yaitu reaksi penggabungan dua inti atom ringan menjadi inti atom yang lebih berat sambil melepaskan energi. Untuk mendapatkan energi dari reaksi fusi, inti yang akan direaksikan harus dipanaskan pada temperatur yang sangat ekstrem tingginya. Salah satu cara agar dapat mencapai kondisi ini adalah memberikan pemanasan tambahan atau pemanasan sekunder kepada plasma dalam reaksi fusi tersebut. Nilai daya serap rata-rata ion Deuterium yang sesuai dengan selang nilai daya dari data ITER adalah daya yang menggunakan frekuensi 50 MHz sampai dengan 60 MHz. Dengan menggunakan frekuensi 60 Hz diperoleh nilai daya rata-rata yang diserap sebesar 1,235.10-12 W.
Keyword: gelombang radio, pemanasan sekunder, plasma, reaksi fusi