Judul: Penapisan Galur-galur Padi (Oryza sativa L.) Populasi RIL F7 Hasil Persilangan antara Varietas IR64 dan Hawara Bunar terhadap Cekaman Besi
Abstrak: Utilization of marginal lands such as tidal land should be done to increase rice production. The main constraints hampered rice cultivation in that area are low soil fertility, soil acidity and Fe toxicity. Fe-tolerant varities are needed to overcome those problems. Screening for Fe-tolerant character of 300 rice lines from the F7 RIL population derived from a cross between rice var. IR64 and genotype Hawara Bunar using hydroponic technique under 750 ppm Fe resulted 221 Fe-tolerant lines. The field test at the lowland with high Fe content in the Experimental Station of Taman Bogo, Lampung resulted 3 Fe-tolerant lines, which were IRH195, IRH548 and IRH715. Verification and optimization of Fe tolerance screening method using 3 Fe-tolerant lines, 3 Fe-sensitive lines and 6 rice varieties using hydroponic technique under 1000 ppm Fe showed consistant result with the field test result. The hydroponic technique with half concentration of Yoshida solution under 1000 ppm Fe colud be used as a screening method for Fe tolerance in rice.
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Judul: Phenotipic Variation of F7 Rice Lines Derived from a Cross between IR64 X Hawara Bunar Under Aluminum Stress.
Abstrak: Aluminum(Al) toxicity is onethe most important limiting factors for upland rice growth and production in acid soils. This study was aimedtoanalyze the diversity of phenotypes and to select an F7 rice Recombinant InbreedLines(RIL) population derived froma crossbetweenricevarietasIR64 and Hawara Bunar for Al resistance. The experiment used 300 rice lines fromthe F7 RILpopulationand 3 control varieties which were IR64 (Al-sensitive), Hawara Bunar (Al-tolerance), and Danau Gaung (Al-tolerance). The experiment was designed using Randomized Complete Block with single factor and 3 replication.The experiment carried out in 3 places; the laboratory, the greenhouse and the field. The results showed that based on Relative Root Legth (RRL) as a selection character, the 300 rice linescould be grouped into 130(43%)high Altolerant lines, 68(22.6%) moderate Al-tolerant and 102(34%)Al-sensitivelines. The green house experiment using 50 selected rice lines that were grown in Yellow Red Podzolic acid soil could select 32 lines that were Al-tolerant with good agronomic characteristics. The field experiment using 32 selected rice lines that were grown in Yellow Red Podzolic acid soil in Taman Bogo, Lampungcould select 4 lines (161, 322, 531, 699) that were tolerant to Al stress and acid soilwith good agronomic characteristics.
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Judul: Infeksi Virus Parainfluenza Pada Anjing
Abstrak: Virus parainfluenza anjing termasuk famili Paramyxoviridae, berbentuk pleomorf dengan ukuran bervariasi (bergaris tengah antara 100-500 nm), berpembungkus peka ether, berisi genom RNA dan secara serologis mempunyai kesamaan dengan virus SV-5 kera; dikenak sebagai salah satu kausa penting dari sindrom "kennel cough". Infeksinya dapat mengenai anjing semua umur yang belum pernah terinfeksi atau mendapatkan vaksinasi mengakibatkan gejala klinis ringan yang terbatas pada traktus respirasi atu infeksi yang secara klinis tidak memperlihatkan gejala nyata. Gejala klinis yang nampak setelah masa inkubasi (1-5 hari) terlewati berupa batuk yang tidak berat selama beberapa hari, berbagai tingkat tonsilitis dan pharyngitis dan kadang-kadang ditemukan kenaikan temperatur rektal antara 1-2 derajat C dari temperatur normal rat-rata. Anjing terinfeksi mengandung virus pada traktus respirasi bagian atas dan bawah serta limfonoduli sampai hari ke 9 setelah infeksi. Penyebaran virus antar anjing terjadi secara aerogen.
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