Judul: The expression of RB Gene in potato cv. Granola to enhance resistance to late blight (Phytophthora infestans (Mont.) de Bary)
Abstrak: Potato (Solanum tuberosum) is one of the important horticulture crop to Indonesia. Their high nutrition and balance food content make them favorable to support food security program in Indonesia. One if the most devasting pathogen cause production decrease is late blight caused by Phytophthora infestans. In Indonesia, late blight is the most important disease in potato can increase crop losses until 100%.
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Judul: Ketahanan klon kentang liar (Solanum chacoense) terhadap penyakit layu bakteri (Ralstonia solanacearum) secara in vitro dan di lapangan
Abstrak: Potato is one of the world most important crops after rice, wheat, and maize. One of the major constraints to potato production is yield losses due to bacterial wilt (Ralstonia solanacearum). Planting resistant potato cultivars is an effective measure to control the disease, but resistant potato cultivars are lacking. Genetic resistance to bacterial wilt were found in wild potato species, such as Solanum chacoense. A research was carried out from January to September 2007 with objectives: (1) to find clones of wild potato Solanum chacoense that are resistant to the bacterial wilt, both in vitro and in the field; (2) to obtain an effective inoculation in vitro technique for evaluation of resistance to the disease, and (3) to identify an in vitro technique that give comparable results to that from the field trial. The research activities consisted of an in vitro trial and a field trial. Nineteen S. chacoense clones were evaluated for their resistance to bacterial wilt, and one susceptible potato cultivar Atlantic was used as a susceptible check. In the in vitro trial, two inoculation techniques were evaluated, i. e., the flooding and the leaf clipping techniques. The trial was arranged in a Factorial Experiment using a Completely Randomized Design with three replications. In the field trial, which was carried out in Pasir Sarongge, Cianjur, West Java (+1100 m above sea level), a Randomized Block Design with five replications was used to evaluate resistances of the potato clones. The trial was carried out in a homogenous heavily infested soil. Results of the trials showed that resistances of the 19 S. chacoense clones varied. These were indicated by the incubation period and incidence of the disease of each clones. Two of the clones (Pi230580 no. 01 and 03) were resistant to the disease both in vitro and in the field. Another clone (Pi230580 no. 04) was found resistant to the disease in the evaluation using the flooding technique. Among the clones in the field trial, four clones were moderately resistant, 6 clones were moderately susceptible, and 7 clones were susceptible. Both the flooding and leaf clipping techniques were effective for in vitro evaluation of the potato clones for resistance to the bacterial wilt, and the results was comparable to that from the field trial. The leaf clipping technique is preferably chosen for the in vitro evaluation of potato clones for resistance to bacterial wilt, since it showed results comparable to that of the field trial. Besides, comparing to the flooding technique, the leaf clipping technique was more effective in inoculum spreading and more efficient in time and number of inoculum used.
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Judul: Beberapa aspek anatomi alat sirkulasi ruang dada kancil
Abstrak: Telah dilakukan penelitian dengan menggunakan 10 ekor kancil dewasa jantan dan betina dengan tujuan untuk menge- tahui beberapa aspek anatomi alat sirkulasi di dalam ruang dada, meliputi jantung, pembuluh darah yang keluar dan ma- suk jantung serta ukuran-ukuran jantung. Kancil merupakan ruminansia terkecil di dunia, hidup di daerah tropika India, Thailand, Malaysia dan Indonesia bagian barat. Hewan ini dilindungi dan mempunyai prospek yang baik untuk hewan penelitian maupun dibudidayakan. Hasil penelitian menunjukkan bahwa berat jantung rаta-rata adalah 0.69% dari berat rata-rata kancil. Dan ini mirip pada jantung kuda dan anjing. Bentuk jantung lonjong seperti halnya ruminansia. Demikian pula letaknya di dalam ruang dada seperti pada ruminansia dengan adanya Ligamentum sternopericardiacum. Di dalam ventrikel kanan membersit sebuah Musculus (M.) papillaris dari dindingnya dan tiga sampai empat Musculi (Mm.) papillares dari Septum interventriculare. Hanya dua buah Mm. papillares yang berukuran besar dibersitkan dari dinding ventrikel kiri. Percabangan Arteri (A.) coronaria sinistra lebih dominan dari pada A. coronaria dextra. Sedangkan A. sub clavia sinistra dicabangkan langsung dari aorta di dorso- caudal pembersitan Truncus (Tr.) brachiocephalicus…
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