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: 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: Hydroxyapatite-Chitosan Composite Coating on Stainless Steel 316 to Improve Corrosion Resistance
Abstrak: Metals that were used in bone implantation should have good corrosion resistance that were not easily corroded when implanted into the body. Metal corrosion resistance of stainless steel 316 can be enhanced through the metal coating by hydroxyapatite-chitosan composite with composition ratio of hydroxyapatite (gram) and chitosan 3% (mL) 0.2:0, 0.2:0.1, 0.2:0.5, 0.2:1.0, and 0.2:1.5. Besides improving the corrosion resistance of metal, the presence of chitosan also maintain the position of hydroxyapatite on metal surfaces. Corrosion resistance increases with increasing amount of chitosan added and the best composition of hydroxyapatite-chitosan composite was 0.2:1.0.
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