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: Identification of Morpho-Agronomic Characteristics of 48 Inbred Lines of Maize (Zea mays L.)
Abstrak: Pengembangan jagung sangat prospektif karena nilai multigunanya. Pemuliaan jagung merakit varietas hibrida merupakan upaya penting. Keragaman genetik dalam populasi jagung diperlukan untuk menyeleksi calon tetua hibrida. Penelitian ini bertujuan mempelajari keragaman karakter morfologi dan agronomi serta mengidentifikasi galur jagung yang potensial sebagai tetua hibrida. Penelitian dilakukan di Kebun Percobaan Leuwikopo, Dramaga, Bogor, pada September 2023 hingga Januari 2024 menggunakan rancangan kelompok lengkap teracak augmented. Varietas pembanding meliputi BISI-18, JHG02, P21, P27, NK Perkasa, dan NK Sumo dengan enam ulangan, serta 48 genotipe yang diuji. Hasil penelitian menunjukkan genotipe jagung berpengaruh nyata pada hampir semua karakter kecuali anthesis silking interval. Perbedaan nilai tengah ditemukan pada sebagian besar karakter agronomi dan komponen hasil. Keragaman morfologi juga terlihat pada intensitas antosianin pada malai, rambut, dan akar penyangga, serta mengombaknya tepi helaian daun. Seleksi dapat dilakukan pada hampir seluruh karakter kuantitatif karena memiliki nilai heritabilitas arti luas yang tergolong tinggi. Terdapat tiga klaster utama berdasarkan fenotipe. Genotipe dalam klaster 1 seperti L15, NEI, M8, M9, L41s, P13, dan L42 berpotensi dikembangkan sebagai tetua hibrida. Korelasi kuat antara karakter agronomi dan komponen hasil belum ditemukan, korelasi didapati pada beberapa karakter seperti umur berbunga jantan dan betina, tinggi tanaman dan tinggi tongkol serta antar karakter lainnya., The development of corn commodities is promising due to its multifunctional value. Corn breeding to develop hybrid varieties is an important effort. Genetic diversity in corn populations is needed as a source for hybrid breeding. This study aimed to elucidate genetic diversity based on morphological and agronomic characteristics of 48 inbred lines and identify potential lines. The research was conducted from September 2023 to January 2024 at Leuwikopo Experimental Station, Dramaga, Bogor, West Java. The experiment used an augmented randomized complete block design with six replications for the checks. Forty-eight inbred lines were evaluated along with six check varieties BISI-18, JHG02, P21, P27, NK Perkasa, and NK Sumo. The results showed that genotypes significantly influenced all observed traits except the anthesis silking interval. Differences in mean values were found in most agronomic traits and yield components. Morphological diversity was also observed in the intensity of anthocyanin on the tassels, silks, and brace roots, as well as the leaf edge pattern. Selection can be performed on almost all quantitative traits due to their high broad-sense heritability values. There are three main clusters based on phenotype. Genotypes in cluster 1 such as L15, NEI, M8, M9, L41s, P13, and L42 tended to be potential as hybrids’ parents due to their good per-se morpho-agronomic traits. There is no strong correlation between agronomic traits and yield, but correlations were observed among some traits such as male and female flowering time, plant height and ear height, as well as among other traits.
Keyword: karakterisasi, keragaman genetik, heatmap, characterization, genetic variation

Judul: Elektrodeposisi Film Tipis Semikonduktor Cu2ZnSnS4 (CZTS) pada Substrat Kaca ITO
Abstrak: Semiconductor Cu2ZnSnS4 (CZTS) thin film that can be used as absorber layers on solar cell module was made via electrodeposition method. CZTS thin film was electrodeposited on the surface of a silicate glass coated with a thin layer of indium tin oxide (ITO). Deposition process was done using potentiostatic mode at room temperature with a potential of 1.05 V for 30, 45, and 60 minutes, followed with annealing the film at 2 different temperatures, 500 ºC using furnace and 180 ºC using hot plate, both treatments for 45 minutes in N2/H2S atmosphere. The X-ray difractograms were analyzed using Match 2 program and showed that the CZTS thin films had kesterit crystalline structure, with a low percentage of CZTS phase. The thin film also contained secondary phases such as Cu2S, ZnS, and SnS. The obtained CZTS thin films had a thickness between 1.039 and 1.676 μm. Absorption study showed that the band gap energy of CZTS thin films which was annealed using furnace ranged from 1.50 to 1.52 eV, whereas that annealed using the hot plate was not observed. The band gap energy value showed that CZTS thin films can be used as sunlight absorber layers on solar cell. The formation of CZTS crystal film on this investigation was effectively performed using furnace annealing process at a temperature of 500 ºC with deposition time of 45 minutes.
Keyword: Thin film, Electrodeposition, Cu2ZnSnS4