Judul: Diversity among Indonesian Pulses based on Morphological and Molecular Markers (ISSR)
Abstrak: Pulses as one among the most common food consumed has a very high genetic diversity in Indonesia. The aims of this study were to determine genetic diversity of potential pulses, the relationships among pulses, and to characterise some pulses. The study was conducted at Pasir Kuda Experimental Station, Center for Tropical Horticulture Studies, Bogor from March 2016 to October 2016. The pulses were 6 accessions of winged bean (Psophocarphus tetragonolobus), 2 accessions of lima bean (Phaseolus lunatus L.), 2 accessions of egyptian bean (Lablab purpureus), 1 accessions of cowpea (Vigna sinensis), 1 accessions of long bean (Vigna unguiculata), 1 accessions of bambara groundnut (Vigna subterranean), 1 accession of jack bean (Canavalis ensiformis), and 1 accession of velvet bean (Mucuna pruriens). There were 45 morphological characters and 8 ISSR markers that were used in this study. Based on morphological analysis, qualitative characters showed 93,94% polymorphism among the pulses. All the quantitative characters showed significant different results. The cluster analysis showed two major groups at 0,594 of dissimilarity. Based on molecular analysis, the amplified bands are 100% polymorphic bands. The cluster analysis was devided into two major groups at 0,387 of dissimilarity. Accumulation between morphological and molecular markers has two major groups in the dendrogram at 0,437 of dissimilarity
Keyword: characterisation, clustering, legumes, microsatellites, potential crops

Judul: Characterization of Red Bean (Phaseolus vulgaris L.) Genotypes in The Lowlands of Bogor
Abstrak: Kacang merah dibudidayakan di Indonesia terutama di dataran tinggi dan secara terbatas di dataran rendah. Budidaya kacang merah di dataran rendah memiliki peluang lebih besar dibandingkan dataran tinggi. Budidaya kacang merah belum didukung dengan ketersediaan varietas unggul. Perakitan varietas unggul memerlukan informasi keragaman genetik. Penelitian ini bertujuan untuk memperoleh informasi keragaman morfologi dan agronomi 13 genotipe kacang merah. Penelitian dilakukan pada Desember 2022-Februari 2023 di Kebun Percobaan Leuwikopo IPB, Dramaga, Bogor pada ketinggian 183 mdpl. Sebanyak 13 genotipe kacang merah ditanam dalam rancangan kelompok lengkap teracak tiga ulangan. Pengamatan dilakukan terhadap karakter morfologi dan agronomi baik kualitatif maupun kuantitatif. Hasil penelitian menunjukkan bahwa genotipe berpengaruh nyata terhadap karakter tinggi tanaman vegetatif, tinggi tanaman generatif, jumlah buku, umur berbunga, umur panen, jumlah tandan produktif, jumlah polong per tanaman, panjang polong, bobot polong, dan bobot polong per tanaman. Faktor genetik berperan besar mengendalikan karakter tinggi tanaman vegetatif, tinggi tanaman generatif, jumlah buku, umur berbunga, umur panen, jumlah tandan produktif, jumlah polong per tanaman, panjang polong, bobot polong, dan bobot polong per tanaman dengan h2bs 0,57-0,98. Dendrogram karakter morfologi dan agronomi diukur dengan jarak 3,00 mengelompokkan 13 genotipe kacang merah menjadi empat cluster. Cluster I terdiri dari genotipe KM49, KM49, KM47, KM56, KM54, KM52, dan KM57. Cluster II terdiri dari genotipe B165-5, B165-3, B165-2, dan KM8. Cluster III genotipe KM24 dan cluster IV genotipe KM58., Kidney beans are cultivated in Indonesia, especially in the highlands, and to a limited extent in the lowlands. The cultivation of kidney beans in lowland areas ha a greater opportunity compared to highland areas. The cultivation of kidney beans is not yet supported by the availability of superior varieties. Assembling superior varieties requires information on genetic diversity. This research aims to obtain information on the morphological and agronomic diversity of 13 genotypes of kidney beans. The research was conducted from December 2022 to February 2023 at the Leuwikopo Experimental Garden, IPB University, Dramaga, Bogor at an altitude of 183 meters above sea level. A total of 13 genotypes of kidney beans were planted in a randomized complete block design three replications. Observations were made on morphological and agronomic characters, both qualitatively and quantitatively. The results showed that genotype significantly affected the characters of vegetative plant height, generative plant height, number of nodes, flowering age, harvesting age, number of productive bunches, number of pods per plant, pod length, pod weight and pod per plant weight. The characteristics of vegetative plant height, generative plant height, number of nodes, flowering age, harvesting age, number of productive bunches, number of pods per plants, pod length, pod weight, and pod per plant weight are largely influenced by genetic factors, with h2 bs ranging from 0.57 to 0.98. The dendrogram of morphological and agronomic characteristics, measured at a distance of 3.00 classified 13 kidney beans genotypes into four clusters. Cluster I consisted of the genotypes KM49, KM49, KM47, KM56, KM54, KM52, and KM57. Cluster II consisted of genotypes B165-5, B165-3, B165-2, and KM8. Cluster III of the KM24 genotype, and cluster IV of the KM58 genotype.
Keyword: kidney bean, diversity, heritability

Judul: Pembuatan Film Tipis Cu2ZnSnS4 sebagai Lapisan Penyerap Cahaya pada Sel Surya Menggunakan Metode Elektrodeposisi
Abstrak: Thin film of Cu2ZnSnS4 (CZTS) is an alternative semiconductor used as light absorber layer on solar cell. CZTS can replace silicon that commonly used as commercial semiconductor. The advantage of using CZTS as absorber layer is due to the abundance of its chemical composer on earth, and its high value of absorption coefficient. The absorber layer was made by using electrodeposition method on ITO glass substrates. The films were deposited at room temperature using potentiostatic mode with a potential of –1.05 V for 30, 45, and 60 minutes. After that, the films were annealed at two different temperatures, 180 ºC and 500 °C, for 45 minutes in N2/H2S atmosphere. Based on X-ray diffraction analysis, the polycrystalline thin film obtained fall into kesterite crystal phase. This type of crystal was obtained when the CZTS was annealed at 500 °C in H2S/N2 atmosphere. The value of optical band gap energy for the CZTS thin film was 2.2 eV with the film thickness about 1.228–6.366 μm. The sample of CZTS with electrodeposition time of 45 minutes and annealing temperature of 500 °C showed the best result and in conformity with absorber layers criteria for solar cells.
Keyword: semiconductor, ITO glass, CZTS thin film, electrodeposition