Judul: Studi Efisiensi Pemakaian Air Beberapa Galur Padi Gogo (Oryza Sativa L.) Pada Berbagai Frekuensi Irigasi
Abstrak: Percobaan ini bertujuan untuk mempeiajari efisiensi pemakaian air dari berbagai galur padi gogo dan responnya terhadop frekuensi irigasi, mengetahui karakter agronomi yang berkaitan dengan efisiensi pemakaian air. Percobaan dilakukan di rurnah kaca Cikabayan IPB, Donnaga mulai Mei sampai Desember 2002. Percobaan menggunakan Rancangan Acak Kelompok dua faktor dengan 3 ulangan. Faktor pertama adalah frekuensi irigasi yang terdiri dari 4 taraf yaitu 1 hari sekali, 2 hari sekali, 4 hari sekali, dan 6 hari sekali. Faktor kedua adalah galur padi gogo yang terdiri dari 9 tarafyaitu (I) IR 57899-2G-MR-I, (2) TB 161E-TB- 19 (produksi tinggi), (3) S 3862-3F-4, (4) B 6926F-TB-I, (5) S 3594G-KN-5-3 (produksi sedang), (6) B 6136-3-TB-B-I-5, (7) S 3594-IH-8, (8) S 3849-IF-22, dan (9) B 9056C-13-BI (produksi rendah).
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Judul: Studi Karakter Morfologi dan Fisiologi yang Berkaitan dengan Efisiensi Pemakaian Air Varietas Padi Gogo
Abstrak: The demand for food consumption of rice increased with the increasing population, while recently wetland experiencing a great reduction. Therefore, dry land cultivation has been developed, including cultivation of upland rice. Dry land crop management in general is constrained by the availability of water, because source of water are only the rain and the soil's ability to retain water. Upland rice cultivation required specific cultivation, particularly the use of crop varieties that have good water-use efficiency or varieties of plants that are able to adapt to the conditions of limited water availability. Research on morphological and physiological studies related to water use efficiency of upland rice varieties need to be developed in order to create optimum utilization of dry land. The research was conducted from October 2013 to April 2014 in the greenhouse IPB Experimental Station Cikabayan, Bogor. The research design was arranged in factorial experiment and using a randomized block design. The first factor was 5 upland rice varieties (Inpago 5, Batutegi, Jatiluhur, Inpago 8 and Sarinah). The second factor was 4 irrigation intervals which were 3, 6, 9, and 12 days. Thus there are 20 combinations of treatment. Each treatment was repeated 3 times and each experimental unit consisted of 3 media so that overall there are 180 growing media. Each planting medium consisted of three plant sample (one family). Plants in polythene bags are used as destructive plants, and were observed at the time of entry phase of the vegetatife phase and the generative phase based on the characteristics of each variety. Plants in buckets are used for the measurement of growth until the generative phase. Characteristics that assosiated with water saving of upland rices were higher plant height, longer panicle, larger roots volume, narrower leaves, higher evapotranspiration, faster flowering phase, greener leaves, higher number of leaves and tillers, heavier dry matter, higher number of grains, heavier 100 grain weight and dry weight of grains. The fraction of available absorbed water at panicle inisiation, flowering inisiation and harvesting phase was 83.36%, 137.14% and 116.65%, respectively, to obtain dry grains of 3.39 ton ha-1. Productivity of each variety at intervals of 3 days irrigation was 3.80 ton ha-1 (Inpago 5), 3.27 ton ha-1 (Batutegi), 3.86 ton ha-1 (Jatiluhur), 3.91 ton ha-1 (Inpago 8) and 2.12 ton ha-1 (Sarinah).
Keyword: Batutegi, evapotranspiration, productivity, water fraction

Judul: Mitochondrial DNA Gene Organization and Phylogenetic Relationship of Naja siamensis
Abstrak: Naja siamensis is one of Asiatic cobra in the Family of Elapidae, known as a cryptic snake. It has many morphological variations that lead to misidentification. Misidentification can cause the wrong concept in developing antivenom types due to high snakebite cases occur in Thailand. Thus, an accurate species identification using a molecular approach is crucially required. Mitochondrial DNA has been used widely in snake molecular studies. These studies were aimed to determine the arrangement of the N. siamensis partial mitochondrial genes using reptile-oriented primers and to reveal the phylogenetic relationship among other species of Asian cobra. DNA extraction was carried out based on the standard DNA salting-out protocol and was conducted by bioinformatics analysis using BLASTn and MEGA 6 software. Gene annotation was performed against N. kaouthia complete genome. A total of 3121 bp of N. siamensis mtDNA genes were sequenced consisting of partial of six regions: 16S rRNA, ND1, tRNA-Ile, CRII region, tRNA-Leu, tRNA-Gln, and COI genes. The mtDNA gene organization of N. siamensis was predicted to has a similar pattern with the common Elapidae mtDNA gene organization. This study showed that there is a monophyletic form in Naja genus and N. kaouthia is the closest species with N. siamensis based on partial 16S rRNA and ND1 gene.
Keyword: 16S rRNA, Elapidae, ND1, phylogenetic relationship