Judul: Peningkatan Produksi Benih Jagung Hibrida melalui Optimalisasi Populasi dan Rasio Tetua Jantan Betina
Abstrak: Attempts to increase seed yield of hybrid corn has been done, but the results have not been satisfactorily achieved. Researches should be done in various aspects such as row ratio of parents, planting density, optimum days to harvest and influence of climatic factors (sunlight and rainfall), season and agroecology. The aim of study are to obtain optimum plant population and rasio of male to female parents for increasing seed yield of hybrid corn and to study seed quality of Bima 3 and STJ-01 varieties. The seeds used in the research were parents of Bima 3 (Nei90008 line as female, Mr14 line as male) and STJ-01 (Bima 5 variety as female, Nei9008 line as male). The experiment was arranged in a randomized complete block design with two factors and three replications (replications was nested in factor of parent ratio). The first factor was male to female parent ratio (1:4, 1:5 and 2:6) and the second factor was plant population (66 667 plants/ha, 83 333 plants/ha and 90 000 plants/ha). Combined analysis of variance was performed to understand the effects of both factors and their interactions. The results showed that plant population did not significantly affect plant height of Bima 3 and STJ-01 parents, ear height of Bima 3 and STJ-01 female parents, leaf area index of STJ-01 female parent, number of ear of Bima 3 female parent, ear weight of Bima 3, and seed yield of Bima3 and STJ-01. The effect of parents ratio was significant for seed yield of Bima 3 and STJ-01. The highest seed yield of Bima 3 variety was achieved at parent ratio 1: 5 (1.43 tons/ha) and the highest seed yield of STJ-01 was achieved at parent ratio 1:4 (3 tons/ha). Seed quality of Bima 3 variety was better than that of STJ-01. The seedling growth of Bima 3 was more simultaneous more tolerant to drought based on germination percentage and speed of germination and more tolerant to salinity based on the number of green leaves.
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Judul: Agronomic Performance and Yield Potential of 30 Maize Hybrids under Biotic Stress Conditions
Abstrak: Jagung adalah komoditas yang memiliki nilai ekonomis dengan permintaan meningkat setiap tahunnya sehingga perlu dilakukan peningkatan potensi hasil. Banyak faktor yang mempengaruhi potensi hasil jagung sehingga perlu dilakukan pengujian terhadap calon varietas baru. Penelitian ini bertujuan mengevaluasi keragaan agronomi dan potensi hasil 30 hibrida jagung. Penelitian dilaksanakan di Grujukan, Puger Kulon, Jember mulai dari bulan September 2020 hingga Januari 2021. Rancangan percobaan yang digunakan yaitu rancangan kelompok lengkap teracak dengan tiga ulangan. Terdapat 32 genotipe yang diuji yaitu 30 genotipe berasal dari persilangan antara galur IPB dengan galur koleksi Balitsereal dan dua varietas pembanding (BISI 2 dan NK6172). Hasil penelitian menunjukkan bahwa terdapat keragaman antar genotipe pada karakter daya tumbuh, umur berbunga jantan, tinggi tanaman, tinggi tongkol utama, diameter batang, diameter tongkol, jumlah baris biji, jumlah biji dalam baris, bobot tongkol, bobot biji per tongkol, bobot seribu biji, kadar air, dan rendemen hasil. Genotipe juga berpengaruh nyata terhadap ketahanan terhadap serangan ulat dan bulai. Terdapat sepuluh genotipe uji yang memiliki potensi hasil setara dengan kedua varietas pembanding, dan yang terbaik diantaranya yaitu P13xNei., Maize is a commodity having a high economic value with increasing demand over years, and therefore it is necessary to increase its production. Several factors affected maize yield, so it is important to evaluate the prospective of new varieties. This research aimed to evaluate the agronomic performance and yield potential of 30 maize hybrids. The research was conducted at Grujukan, Puger Kulon, Jember from September 2020 to January 2021. The experimental design was a randomized complete block design with three replications. Thirty two maize hybrids, consisting of 30 hybrids of IPB lines x ICERI lines, and two commercial hybrid varieties as checks (BISI 2 and NK6172), were evaluated. The results indicated variations among genotypes for character of growth percentage, days to anthesis, plant height, main ear height, stem diameter, ear diameter, number of grain rows per ear, number of grain in rows, ear weight, grain weight per ear, 1000 grain weight, grain moisture, and yield percentage. In addition, the genotype also had significant effects on fall armyworm and downy mildew resistance. Ten test hybrids had a comparable yield potential with the two check varieties, and the best among which was P13xNei.
Keyword: hybrid evaluation, maize breeding

Judul: Infeksi Cacing Jantung Dirofilaria Immitis, Railliet & Henry, 1911 Pada Anjing
Abstrak: Cacing Dirofilaria immitis dewasa yang tinggal dalm ventrikel kanan jantung anjing, sering kali menimbulkan gejala klinis yang cukup berat. Cacing Tersebut menghasilkan mikrofilaria yang selanjutnya berkembang menjadi larva infektif dalam saluran malphigi induk semang entara, yaitu nyamuk dari genus Culex, Aedes dan Anopheles.
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