Judul: Pengujian daya hasil galur-galur padi gogo hasil kultur antera dan resistensinya terhadap penyakit blas daun (Pyricularia grisea)
Abstrak: The objective of the research was to obtain high yielding and blast resistant line of upland rice. Research consisted of three experiments. First yield trial was conducted in Bogor from May-September 2008. Second trial was conducted in Sukabumi from November 2008-March 2009. Resistant study to blast disease was conducted in Sukabumi from November 2008-March 2009. Sixteen doubled haploid lines and four varities (Jatiluhur, Limboto, Batutegi and Cisokan) were used in the two trials. Genotypes IW-54, IW-67, WI-43, WI-44, GI-7, IG-19, IG-38, B13-2e (ranged 3,33-3,77 ton/ha) have the same yield or higher than control Batutegi (3,50 ton/ha), but they are lower than control Jatiluhur (4,71 ton/ha) and Limboto resistant control (5,35 ton/ha). Genotype IW-54, IW-56, IW- 67, WI-43, WI-44, IG-7, O18b-1, GI-19, GI-38, B13-2a, B13-2d, B13-2e, dan D19-1 were resistant to leaf blast disease. Genotype IW-64, A3-2, and A3-7 were susceptible to blast based on disease incidence. Genotype A3-2 and A3-7 were susceptible to leaf and neck blast. IW-54, IW-67, WI-43, WI-44, GI-7, IG- 19, IG-38, and B13-2e have blast resistance and high yield potential, low to medium amylase, low-high gelatinization temperature. It is suggested that those potential lines to be tested further for multilcation trials.
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Judul: Pengujian Galur-Galur Dihaploid Padi Gogo
Abstrak: Demand for rice as a main food source of Indonesia's population continues to increase along with the population increase each year. An important input to increase rice productivity is the use of superior genotype. The good lines may be obtained through anther culture. This research was to study the agronomic traits and yield of doubled haploid lines of upland rice obtained from anther culture and compared to the check varieties Batutegi and Inpago 4. The study was conducted in field trials Babakan, University Farm, Bogor Agricultural University. Research was arranged in a randomized complete block design with four replications. Variables measured were vegetative plant height, generative plant height, number of vegetative tillers, number of productive tillers, flowering time, harvesting time, panicle length, number of pithy grain per panicle, number of empty grains per panicle, number of total grains, the percentage of pithy grain per panicle, the percentage of empty grains per panicle, weight of 1 000 grains, and grain yield per plot. The result showed that genotype gave very significant effect on the observed variables. There were lines whose productivity was higher than the check varieties: GM6, GM7, and GM8.
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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