Judul: Keragaman Genetik, Heritabilitas, Dan Analisis Koefisien Lintasan Pada Plasma Nutfah Gandum (Triticum Aestivum L.) Koleksi Balitbiogen
Abstrak: The aims of this experiment are to study the geneUc variation, heritability of the wlleat germplesm collection and cotrelation among chafllctelS using pathcoefficient analysis. This experiment was conducted at Rice Research Station in Kuningan, West Java on June until October 2002 using RandOmized Completely Block Design (RCBD) with three replications. each of the twenty-seven genotypes of wheat was planted on four rows with 3 m lenght. The interrow and interplant spacing were 25 em and 10 em, respectivity. Deta obtained from the twenty-seven genotypes were subjected to variance analysis and the heritability of the traits _mated by component of variance method. Correlation coefflcients were computed according to the formula of Goulden (1959). Direct and indirect path coefflcients were calculated as described by Dewey and Lu (1959). High geneUc varianon displayed by l00-grain weight, numberofUllelS per plant and number of spikes per plant The esUmation of heritability ranged from 0 to 94.58%. The days to nower, plant height, spike length, number of greins per spike, and l00-grain weight were uncotrelated with grain yield per plant. In the other hand, the days to harvest, number of tillelS per plant, number of Spikes per plant, dry spikes weight, and harvest spikes weight were positively and significanty correlated with grain yield per plant. The number of graints per plant, number of spikes per plant, number of grains per spike, and l00-grein weight each had a posiwe direct effect on grain yield per plant. The indireci effect on grain yield per plant via number of tillers and number of Spikes (productive tillers ) per plant showed by days to harvest, dry Spikes weight, and harvest Spikes weight. The number of productive tillers per plant was a good criteria to be used towards improvement of grain yield.
Keyword: 

Judul: Analisis genetik dan seleksi generasi awal segregan gandum (Triticum aestivum L.) berdaya hasil tinggi
Abstrak: The preliminary breeding research series to develop adaptive variety in wheat to low and medium land regions had been conducted. It was started from evaluation and identification of agronomical responses of some introduced varieties, selective hybridization and development the breeding populations, until selection in early generation to identify high yielding potential segregants. First field experiment was conducted at two Indonesian agroecosystems (BIOTROP as low land representative and Cipanas as high land representative) from Mei to September 2011 and others were conducted at Research Station of BALITHI, Cipanas. The first experiment results showed that location had significant effect on wheat performance. High temperature in low land decrease the sink-source capacity, accelerate the seed filling period, and increase the empty floret. The tested genotypes were classified into three tolerance level. Oasis was classified as tolerant genotype, HP1744, LAJ, Menemen, Alibey, Selayar, and Dewata were classified as medium tolerant, and Rabe, H-21, G-21, G-18, and Basribey classified as sensitive genotypes. Analysis of agronomical traits-controlling gene action showed that all of observed traits controlled by poligenic with additive and epistatic effects. The total tillering number, productive tillering number, shoot-root dried weight, seed weight/panicle, and seed number/pland had strong phenotypic correlation with seed weight/plant. On the other hand, based on path analysis only two traits which had high direct effect to seed weight/plant. Those traits are useful for secondary trait in improving yield potential. Four selected traits (seed weight/plants, productive tillering number, seed weight/panicle, ratio of empty floret) had been used to develop an selection index. Selected segregants in Oasis x HP1744 population are O/HP-F2-87, O/HP-F2-93, O/HP-F2-100, O/HP-F2-106, O/HP-F2-51, O/HP-F2-6, O/HP-F2-16, O/HP-F2-124, O/HP-F2-92, O/HP-F2-39, O/HP-F2-9, O/HP-F2-26, O/HP-F2-31, dan O/HP-F2-123. S/R-F2- 39, S/R-F2-13, S/R-F2-61, S/R-F2-19, S/R-F2-56, S/R-F2-7, and S/R-F2-64 are selected segregants in Selayar x Rabe population. In addition selected segregants in Dewata x Alibey population are D/A-F2-34, D/A-F2-13, D/A-F2-99, D/A-F2-22, D/A-F2-70, D/A-F2-4, D/A-F2-33, D/A-F2-80, D/A-F2-25, dan D/A-F2-65. All of the selected segregants have higher phenotypic performance in all observed traits than their parents.
Keyword: 

Judul: Elektrodeposisi Film Tipis Semikonduktor Cu2ZnSnS4 (CZTS) pada Substrat Kaca ITO
Abstrak: Semiconductor Cu2ZnSnS4 (CZTS) thin film that can be used as absorber layers on solar cell module was made via electrodeposition method. CZTS thin film was electrodeposited on the surface of a silicate glass coated with a thin layer of indium tin oxide (ITO). Deposition process was done using potentiostatic mode at room temperature with a potential of 1.05 V for 30, 45, and 60 minutes, followed with annealing the film at 2 different temperatures, 500 ºC using furnace and 180 ºC using hot plate, both treatments for 45 minutes in N2/H2S atmosphere. The X-ray difractograms were analyzed using Match 2 program and showed that the CZTS thin films had kesterit crystalline structure, with a low percentage of CZTS phase. The thin film also contained secondary phases such as Cu2S, ZnS, and SnS. The obtained CZTS thin films had a thickness between 1.039 and 1.676 μm. Absorption study showed that the band gap energy of CZTS thin films which was annealed using furnace ranged from 1.50 to 1.52 eV, whereas that annealed using the hot plate was not observed. The band gap energy value showed that CZTS thin films can be used as sunlight absorber layers on solar cell. The formation of CZTS crystal film on this investigation was effectively performed using furnace annealing process at a temperature of 500 ºC with deposition time of 45 minutes.
Keyword: Thin film, Electrodeposition, Cu2ZnSnS4