Judul: Yield Trial of 12 Promising Lines of F11 Generation Lowland Rice at Brebes Regency
Abstrak: Uji adaptasi merupakan proses pengujian daya hasil dan daya adaptasi dari galur-galur di lokasi yang berbeda. Uji daya hasil dan daya adaptasi merupakan tahapan kegiatan pemuliaan tanaman untuk menghasilkan varietas unggul baru. Penelitian ini bertujuan menguji dan mengevaluasi daya hasil 12 galur padi sawah populasi IPB187, IPB189, IPB191, IPB193, dan IPB194 generasi F11. Penelitian dilakukan di Desa Bentar Kecamatan Salem Kabupaten Brebes, sejak Oktober 2020 sampai Maret 2021. Penelitian ini menggunakan rancangan kelompok lengkap teracak (RKLT) faktor tunggal yaitu genotipe yang terdiri dari 12 galur IPB dan 2 varietas pembanding dengan tiga ulangan. Hasil Penelitian menunjukkan IPB 189-F-13-1-1 (6,386 ton ha-1), IPB 189-F-23-2-2 (6,774 ton ha-1), dan IPB 193-F-17-2- 3 (7,142 ton ha-1) memiliki daya hasil yang setara atau lebih tinggi serta memiliki karakter agronomi yang lebih baik daripada varietas pembanding, yaitu Ciherang (4,921 ton ha-1) dan Inpari 32 (5,642 ton ha-1)., Evaluation at multi-environment is needed to evalute the adaptability of breeding lines as a process toward vatiety release. This study aims to evaluate 12 lowland rice linesfrom IPB187, IPB189, IPB191, IPB193, and IPB194 populations. The research was conducted in Bentar Village, Salem District, Brebes Regency, from October 2020 to March 2021. The study used a single factor randomized complete block design (RKLT), with three replications. Twelve lines were evaluated with two national varieties, Ciherang and Inpari 32, as check. The results showed several lines have better productivity compared to check i.e IPB 189-F-13-1-1 (6.386 ton ha-1), IPB 189-F-23-2-2 (6.774 ton ha-1), and IPB 193-F-17-2-3 (7.142 ton ha-1 ) while check vareties Ciherang and Inpari 32 produced at 4.921 ton ha-1 and 5.642 ton ha-1, respectively.
Keyword: adaptation test, yield power, new plant type

Judul: Yield Trial of New Plant Types Rice Line from Five Populations at Low Dose Fertilization Conditions
Abstrak: Pengujian galur padi merupakan tahap untuk mendapatkan genotipe unggul untuk menghasilkan suatu varietas baru. Penelitian bertujuan menguji daya hasil dan keragaan 37 galur padi sawah bermalai lebat pada kondisi pemupukan dosis rendah. Percobaan dilakukan di Kebun Percobaan IPB Sawah Baru, Bogor menggunakan rancangan kelompok lengkap teracak (RKLT) faktor tunggal dengan dua ulangan. Galur yang diujikan terdiri atas 37 galur padi tipe baru dari lima populasi beserta 2 varietas pembanding yaitu Inpari 32 dan Ciherang. Hasil analisis menunjukkan bahwa galur-galur yang diuji memiliki produktivitas yang setara atau tidak berbeda nyata dengan varietas pembanding. Galur yang memiliki potensi produktivitas lebih tinggi daripada pembanding yaitu IPB193-F-31-1-1 (6,58 ton ha-1), IPB189-F-17-3-2 (6,26 ton ha-1), IPB187-F-117-2-1 (6,74 ton ha-1), dan IPB193-F-4-1-3 (6,28 ton ha-1), sedangkan produktivitas dari varietas pembanding Inpari 32 dan Ciherang sebesar 5,34 ton ha-1 dan 4,40 ton ha-1., Yield trial is one of stage to obtain superior genotypes to produce a new varieties. The research aimed to evaluate the yield and performance of 37 heavy panicle paddy rice lines under low-dose fertilization conditions. The experiment was conducted at the Experimental Station of IPB University, Bogor, using a single factor randomized complete block design (RKLT) with two replications. The lines evaluated consisted of 37 new rice lines from five populations along with 2 check varieties, namely Inpari 32 and Ciherang. The results of the analysis showed that the tested lines had the same productivity or had no significant effect on the check varieties. Lines that have higher productivity potential than the check varieties are IPB193-F-31-1-1 (6.58 tons ha-1), IPB189-F-17-3-2 (6.26 tons ha-1), IPB187-F-117-2-1 (6.74 tons ha-1), IPB193-F-4-1-3 (6.28 tons ha-1), while the productivity of the check varieties Inpari 32 and Ciherang were 5.34 and 4.40 tons ha-1, respectively.
Keyword: new plant type rice, potential genotype, yield trial

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