Judul: Estimation of genetic parameters and choice of selection environment for  improvement of corn (Zea mays L.) for low fertilization environment.
Abstrak: Most of the improved corn varieties released in Indonesia are responsive to fertilizer application rate, and they will be low yielding when grown in marginal area. To obtain corn variety which is tolerant to low fertilizer input could be done by improving population through selection. Selection environment determines breeding progress to obtain suitable variety for target environment. The objectives of this study were to estimate genetic parameters and to select for environment in which selection should be conducted when the improved population is to be grown under low fertilization. The experiment was carried out by crossing among S1 lines of Bisma variety using North Carolina Design II. Progenies were evaluated and selected in three levels of fertilizer application. Gain of selection was estimated using full-sib and S1 based on half-sib performance methods
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Judul: Evaluation of Agronomic Traits and Yield Potential of Maize Genotypes (Zea mays L.) in Sumenep, East Java
Abstrak: Maize is the second main food crop after rice grown by farmers in Indonesia. Maize production is currently used for food, feed, and industry. Nusa Tenggara and Madura are areas that use maize as the main source of carbohydrates. Due to high demand over years, superior maize varieties with high yield potential are needed. This study aimed to identify maize genotypes with good agronomic performance and high yield potential. The experiment was conducted at the Batang-Batang Laok Village, Batang-Batang District, Sumenep Regency, East Java from October 2020 to March 2021. The genotypes evaluated consisted of 23 F1 hybrids, four single cross hybrid varieties, two three-way cross hybrid varieties, two open-pollinated varieties, and three local varieties. The research was conducted using a single factor randomized complete block design (RCBD) with three replications. The results showed that the genotype effect was significant on germination percentage, days to anthesis and silking, anthesis silking interval, plant height, main ear height, stem diameter, fresh ear weight with husk, fresh ear weight without husk, dry ear weight without husk, days to harvest, fresh ear length, dry ear length, fresh ear diameter, dry ear diameter, number of grain rows (fresh and dry ears), number of grains per row (fresh and dry ears), ear weight, grain weight per ear, 1000-grain weight, grain moisture, and prediction of grain yield potential. Dry ear weight had a significant and positive correlation with fresh and dry ear length, dry ear diameter, and number of fresh and dry grain per row. B2 x Mr14A has a higher predicted grain yield potential than NK 6172, and is recommended for further evaluation.
Keyword: plant breeding, agronomic characters, maize hybrids, yield evaluation

Judul: Penggunaan Teorema Homeomorphy 2-Manifold dan Teorema Euler Poincare pada Torus 𝑇�� dan Simplicial Complex 𝐾��
Abstrak: Two dimensional topological spaces are said to be homeomorphic if they have the same topological invariant, where one of topological invariant used is an Euler characteristic. Homeomorphy 2-Manifold’s Theorem and Euler Poincare’s Theorem are used to distinguish two topological spaces. Homeomorphy 2-Manifold’s Theorem uses Euler characteristic to identify two dimensional topological spaces. Euler Poincare’s Theorem is an alternative way to find Euler characteristic with Betti number, which is topological invariant as well. The objective of this paper is to investigate the homeomorphism of torus 𝑇����� and simplicial complex 𝐾�����. Topological space torus and simplicial complex 𝐾����� have the same Euler characteristic, which is two. Based on Homeomorphy 2-Manifold’s Theorem topological space torus 𝑇����� and simplicial complex 𝐾����� is homeomorphic.
Keyword: simplicial, torus, Euler, homeomorphism, topology