Judul: Respon Pertumbuhan Beberapa Genotipe F1 Padi (Oryza sativa L.) terhadap Cekaman Suhu Tinggi
Abstrak: The experiment was conducted on Maret to June 2014 at the Experimental Farm Bogor Agricultural University, Cikabayan, Dramaga, Bogor. The purpose of research was to observation the effect of high temperature on the crossing-genotypes, got the tolerant crossing-genotypes, and created the genotype that has the best heterosis and heritability value. In this research, there are 4 the crossing-genotypes that tolerant in high temperature, namely: IPB 4S x Situ Patenggang Marinah x IPB 6R, IPB 4S x IPB 6R, and IPB 4S x IR64. The result of research showed that the number of total tillers, productive tillers, the number of filled out stalks, the mass of filled out/plant, the mass of empty stalks/plant, the total mass of stalks, and the mass of thousand grain was very significantly different for all of genotypes. The number of tillers total 45 DAP (days after planting), the age of flowering, the age of harvesting, the number of empty stalks, and the percentage of filled out stalks was significantly different for all of genotypes. The height of plant 45 DAP and harvesting, the greening of leaf 45 DAP and harvesting, the capacity period, the height of panicle, and the number of stalks total was not significantly different.
Keyword: Bogor Agricultural University (IPB), heritability, the productive tiller, plant height

Judul: Keragaman Populasi F2 Padi (Oryza sativa L.) pada Kondisi Cekaman Suhu Tinggi.
Abstrak: Pemanasan global menyebabkan dampak negatif, antara lain menurunkan produktivitas padi. Pemuliaan tanaman diharapkan mampu menghasilkan varietas baru tanaman padi yang toleran terhadap cekaman suhu tinggi. Tujuan penelitian ini adalah untuk mendapatkan informasi tentang keragaan karakter pertumbuhan serta keragaman genetik karakter agronomi genotipe F2 padi dan seluruh tetuanya pada kondisi cekaman suhu tinggi. Penelitian dilaksanakan dari bulan Februari sampai Juni 2015. Materi genetik yang digunakan adalah 150 individu segregan F2 yang berasal dari persilangan IPB 4S dan IR64, 20 individu tetua IPB 4S, 20 individu tetua IR64. Semua materi genetik ditanam dalam kondisi tercekam suhu tinggi di rumah kaca Institut Pertanian Bogor. Hasil perhitungan nilai tengah menunjukkan beberapa karakter memiliki nilai tengah lebih baik dibandingkan tetua dan terdapat segregan transgresif. Karakter agronomi yang diamati dikendalikan oleh gen aditif, dominan, epistasis duplikat, dan epistasis komplementer. Berdasarkan nilai heritabilitas yang tinggi dan koefisien keragaman genetik yang luas maka karakter panjang malai, persentase gabah bernas per malai, dan bobot gabah per malai contoh dapat dijadikan kriteria seleksi untuk seleksi generasi awal pemuliaan padi toleran cekaman suhu tinggi. Seleksi langsung berdasarkan bobot gabah bernas per tanaman dengan intensitas 50% menghasilkan diferensial seleksi 22,1% pada karakter bobot gabah bernas per tanaman.
Keyword: aksi gen, heritabilitas, koefisien keragaman genetik, seleksi, suhu tinggi

Judul: Pelabelan Super Edge Magic pada Graf Cycle dan Graf Wheel
Abstrak: This manuscript proves that cycle graph and wheel graph have a super edge magic labeling. Super edge magic labeling on a graph is labeling that has an edge magic labeling with a set of vertices were mapped in to {1,2,… ,𝑝} and a set of edges were mapped in to {𝑝+1,𝑝+2,… ,𝑝+𝑞}, in which 𝑝 is order and 𝑞 is size on the graph. There are one lemma and two theorems to be discussed. The lemma is used to prove the two theorems. The first theorem proves that cycle graph 𝐶𝑛 is super edge magic if and only if 𝑛 is odd. The second theorem proves that wheel graph 𝑊𝑛 of order 𝑛 is not super edge magic. Moreover 𝑊𝑛 is not edge magic if 𝑛≡0 mod
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