Judul: Keragaan Pertumbuhan dan Produksi Beberapa Varietas Padi pada Dua Kondisi Suhu yang Berbeda
Abstrak: The objective of the research was to get the information about rice growth performance and production rice at two different temperature conditions and to study the effects of high temperature stress on production of rice. An experiment was conducted at Experimental Field Cikabayan, University Farm, IPB, Bogor. Rice was planted at two conditions, at the optimum temperature (in the open ground) and at the high temperature (in the green house). The experiment was arranged in a randomized completely block design with three replications. The extremely high tempetature will increase sterility in grain. The results showed that there were significant differences among the varieties evaluated for all traits observed. The results also showed that time of heading, time of flowering and length of penicle were not affected by temperature conditions. The traits of number of productive tiller, time of heading, time of flowering, height at generative stage, the leaf greenness at generative stage, time of harvesting, number of filled grain, number of total grain, weight of filled grain, and weight of 1000 grain were affected by genotypes x temperature conditions. Based on this study, the varieties that could maintain their yield under high temperature conditions are Situ Patenggang, Mekongga, IR-64, Kalimutu, and IPB 6R. The varieties could be used as genetic material in breeding program.
Keyword: tropical conditions, rice, high temperature

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: Pelabelan Super Vertex Magic
Abstrak: Super vertex magic labeling is labeling on graph with is a set of edges mapped into and is a set of vertices mapped into . It has a vertex magic labeling in which and represents the size and order of the graph respectively. This manuscript proves that paths, cyclics, and disjoint union of cyclics have a super vertex magic labeling. There are four theorems to be discussed. The first theorem proves that path is super vertex magic if and only if is odd and . The second theorem proves that cyclic is super vertex magic if and only if is odd. The third theorem proves that bijection function from an edge set onto of graph can be extended to a super vertex magic labeling if and only if the set amount of edge label that incidents with a vertex in the graph, consists of sequential integers as many as vertices in the graph. The fourth theorem proves that disjoint union of the cyclics consists of cyclics with each cyclic has vertices is super vertex magic if and only if and are odd.
Keyword: