Judul: Analisis Daya Gabung dan Kelompok Heterosis Galur-galur Jagung Tropis Koleksi PT. BISI International, Tbk
Abstrak: Heterotic grouping in maize takes an important role to enhance breeding efficiency. The aim of the research is to analyse combining ability and heterotic group among several tropical maize lines from PT. BISI International,Tbk’s collections. Eighteen S5 tropical maize lines were used as a genetic material. The research was conducted at PT. BISI International,Tbk’s research station, Kediri and Nganjuk, East Java on May until January 2013. Randomized Complete Block Design (RCBD) was used in the experiment with 3 replications. DMRT test was used to determine the better lines. The first experimental results revealed that the lines were significantly different for days to mature; ear length (cm); ear diameter (cm) and 1000-seed weight (g). Based on dendrogam analysis by 3.5 Euclidian dissimiliarity coefficient, the lines can be grouped into 8 groups. Group 1 consists of Sr-1#001 and Loe#242. Loe#057 in group two. Group 3 consists of Sr-1#239; Pron#163; Pron#233; Loe#061 and Loe#055. Group 4 consists of Sr-1#147; Pron#077 and Pron#142. Sr-1#086 and Loe#214 belong to group 5. Pron#026 and Loe#187 belong to group 6. Sr-1#016 and Pron#151 (group 7). Sr-1#247 in the group 8. Pron#077; Loe#055; Loe#057; Pron#142; Sr-1#247; Sr-1#086; Loe#187; Pron#163; and Sr-1#001 were the better lines based on yield potency that potencial to be selected for combining ability and heterosis evaluation. Nine selected tropical maize lines were crossed based on Griffing’s diallel mating design I to generate 9 maternal lines, and 36 F1s and its reciprocal F1s, respectively. The research was conducted across two different locations. The RCBD was used in the experiment with 3 replications. The result of this experiment showed that genotypes x locations effect was significant for all traits except ear length, ear diameter and yield potencial. Additive genetic effect were more important for controlling days to anthesis, days to silking, plant height, ear length ear diameter, moisture content, ear shelling and 1000-grain weight, while non-additive genetic effect were more important for days to harvest, ear weight per plot and yield potencial. Best specific combinations for several important traits were exhibited from parent lines with high x low GCA. The lines showed good heterotic potencial up to 266.20% for heterobeltiosis value. The good GCA lines for yield potencial were Sr-1#001 and Loe#187, Sr-1#001xLoe#055, Sr- 1#247xLoe#055, Sr-1#086xLoe#055, Pron#163xLoe#055, Pron#077xLoe#055, Pron#142xLoe#055, Loe#187xLoe#055 and Loe#057xLoe#055. Best heterobeltiosis was exhibited by Pron#163xPron#142 and Pron#163xPron#077. Based on Dunnet test, the result of third experiment revealed that Sr-1#001xSr- 1#086 (7.49 t/ha), Sr-1#001xPron#142 (7.92 t/ha), Loe#057xPron#142 (7.68 t/ha), Sr-1#001xLoe#187 (8.13 t/ha) and Sr-1#247xLoe#187 (7.64 t/ha) were not significant to BISI816, NK22 and P21, statistically. Sr-1#001xSr-1#086 showed good moisture content traits. Sr-1#001xPron#142 was better than P21 for plant height at Kediri site. Loe#057xPron#142 exhibited better ear girth performance than NK22 across two location, while its ear weight per plot was better than P21 at Kediri site . Sr-1#247xLoe#187 exhibited earlier days to anthesis than BISI816, consistently. The hybrids were potencial to be selected and tested in an advanced hybrids testing program. Combining ability and heterosis analysis, strengthen by yield performance evaluation were used as a basic informations to create heterotic groups. Loe#055, Pron#163 and Loe#187 can
Keyword: 

Judul: Evaluation of Agronomic Traits and Yield  Potential of 60 Maize Hybrids (Zea mays L.)
Abstrak: Produksi jagung nasional di Indonesia masih perlu ditingkatkan melalui pengembangan varietas-varietas unggul hibrida untuk memenuhi kebutuhan pangan, pakan, dan industri. Hibrida yang diuji perlu dilakukan evaluasi dan dibandingkan dengan varietas pembanding. Penelitian ini bertujuan mengevaluasi keragaan agronomi dan potensi hasil pada 60 hibrida uji hasil program pemuliaan IPB. Penelitian dilaksanakan pada November 2022 hingga Maret 2023 di Kebun Percobaan Leuwikopo, Bogor. Penelitian ini menggunakan rancangan augmented kelompok lengkap teracak dengan 60 genotipe dan 3 kelompok. Genotipe yang diuji meliputi 6 pembanding, yaitu BISI 18, JHG02, P21, P27, NK Perkasa, dan NK Sumo dengan tiga ulangan, serta 60 hibrida uji tanpa ulangan. Terdapat keragaman genotipe uji jagung pada seluruh peubah pengamatan, kecuali umur berbunga jantan, umur berbunga betina, umur panen, dan jumlah tongkol per tanaman. Semua peubah kuantitatif yang diamati memiliki nilai heritabilitas arti luas yang tinggi, kecuali umur berbunga jantan dan jumlah tongkol per tanaman. Hibrida uji yang potensial adalah H1 x L27, P42 x L23, L15 x L53, L68A x H1, MR14 x B1, P42 x L27, L15 x B4B, B4 x L23, B4 x B1, Nei x P2, P10 x L152, P42 x P10, L15 x Nei, dan L68B x B4B. Produksi hibrida uji tertinggi P42 x L23, National production of maize in Indonesia needs to be increased through the development of superior hybrid maize varieties for food, feed, and industries. The hybrid candidates need to be evaluated and compared with the check varieties. This research aimed to evaluate the agronomic performance and yield potential of 60 maize hybrids from the IPB University breeding program. This research was conducted from November 2022 to March 2023 at the Leuwikopo Experimental Station, Bogor. This study used an augmented randomized complete block design with 60 genotypes and 3 blocks. The genotypes include 6 check varieties, namely BISI 18, JHG02, P21, P27, NK Perkasa, and NK Sumo with three replications, and 60 test hybrids without replication. The genotype effect was significant for all traits observed except for days to tasseling, days to silking, days to harvest, and number of ears per plant. All observed quantitative traits have a high broad-sense heritability estimate except days to taselling and number of ears per plant. The potential hybrid candidates are H1 x L27, P42 x L23, L15 x L53, L68A x H1, MR14 x B1, P42 x L27, L15 x B4B, B4 x L23, B4 x B1, Nei x P2, P10 x L152, P42 x P10, L15 x Nei, dan L68B x B4B. The test hybrid having the highest yield was P42 x L23.
Keyword: evaluation, hybrid, maize breeding, yield

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.
Keyword: