Judul: Uji stabilitas galur-galur padi gogo hasil kultur
Abstrak: The objective of this research was to study the adaptation and yield stability of upland rice lines obtained from anther culture. Ten lines of upland rice obtained from anther culture and two check varieties (Way Rarem and Batutegi) were evaluated for their potential yield in seven different locations in the rainy season 2010/2011 and 2011/2012. In each location, the design was Randomized Complete Block Design with four replications. The method of Francis & Kannenberg, Finlay & Wilkinson, Eberhart & Russel, and AMMI (Additive Main Effect Multiplicative Interaction) were used to analyze the adaptation and yield stability. WI-44 line achieved the highest yield average (4.88 ton ha-1), higher than Batutegi and not significantly different from Way Rarem and has the highest potential yield (10.28 ton ha-1) in Malang in the second season. IW-67 yielded an average of 4.53 ton ha-1, not significantly different from Batutegi and has potential yield (9.09 ton ha-1) in Malang in the second season. WI-44 line has a superior yield average in seven environment. WI-44, IW-67 and IW-56 lines have an ability to adapt in optimal environments. I5-10-1-1, GI-7 and O18-b-1 were adapted in the marginal environments with yield above the average of the genotype tested.
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Judul: Keragaan dan Stabilitas Galur-Galur Padi Gogo Tipe Baru Hasil Kultur Antera
Abstrak: Breeding of upland rice is now directed towards new plant type (NPT) architecture. NPT rice lines have been obtained from anther culture and need to be evaluated in multilocation trials. The objectives of the research were to obtain information on agronomic characters, genetic parameters, yield potential, adaptability and stability of the lines. Ten lines and two cultivars were planted at seven different location in November 2010 – March 2011. In each location, the experimental design was randomized complete block design with four replications. Observation was done on agronomic characters such as plant height, number of vegetative tiller and productive tiller, panicle length, number of filled grains per panicle, empty grains per panicle, and total grains per panicle, 1000-grain weight, grain weight per plant and yield per hectar. The results showed FM1R-1-3-1 and Fat-4-1-1 rice lines has grain weight per plant 20.3 and 18.2 grams/plant respectively and other agronomic characters that were better than eight other lines. Genotype x environmental interaction factors contributed to variance by 16.6%. The highest productivity was achieved by FM1R-1-3-1 (4.52 ton/ha). FM1R-1-3-1 showed as genotype specifically adapted to favourable environments.
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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