Judul: Screening of upland rice (Oryza sativa L.) lines derived from anther culture to aluminium tolerance and blast resistance
Abstrak: Aluminium (Al) toxicity and blast disease caused by fungus Pyricularia grisea (Cooke) Sacc. are the most important yield-limiting factors for upland rice production in acid soils. A series of experiment were conducted to screen Al tolerant and blast disease resistance genotypes from doubled haploid (DH) lines derived from anther culture, to examine the contributions of Silicate (Si), Nitrogen (N), and Al accumulation in plant tissue to Al tolerance and resistance to blast disease in upland rice and to evaluate the performance of DH lines in field with Al and without Al toxicity.
Keyword: Pyriculariagrisea(Cooke) Sacc., Haploid ganda, Kultur antera, Akumulaasi silikat, Adaptasi tanaman pada tanah masam, Metode penapisan, Ketenggangan alumunium

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.
Keyword: 

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