Judul: Keragaan Plasma Nutfah Padi (Oryza sativa) pada Kondisi Suhu Tinggi
Abstrak: The Experiment was conducted at Field Station Research of Cikabayan, Bogor Agricultural University in April- August 2013. The objective of the research was to evaluate rice germplasm tolerance to high temperature conditions. The experiment was arranged in Augmented Randomixed Block Design with 8 national variety of rice as checks. The genotypes evaluated were 49 consisted of 20 promising lines and 29 local varieties. The results showed genotypes influenced to the characters plant height at vegetative stage, time of flowering, plant height at harvesting time, long of panicle, number of total tiller, number of productive tiller, time of ripening, number of filled grain, number of empty grain, seed index, weight of total filled grain, number of total empty grain, and percentage of empty grain were very singnificant different among genotypes evaluated. There were several lines and local varieties that had results equals or higher with the checks, namely Mekongga, IR 64, Inpari 13, IPB 3S, IPB 4S, IPB 5R, IPB 6R and IPB 7R.
Keyword: tolerance, rice germplasm, high temperature, evaluation

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: Truncated Stop Loss as a Optimal Solution of Reinsurance Agreement in One-Period Model
Abstrak: Reinsurance is one of risk management efforts of an insurance company, which is called the cedent. Similar with insurance, reinsurance constitutes the cedent to pay the premium. We consider one-period reinsurance model and derive a rule which minimizes the ruin probability of the cedent for a fixed reinsurance premium. Therefore, it is needed to construct an optimal reinsurance agreement for the cedent. The premium is calculated according to four different principles, i.e. economic, generalized zero-utility, Esscher, and mean-variance principles. Stop loss is a reinsurance contract which protect the insurance company for losses that exceed a certain amount. The result of this research shows that a truncated stop loss is an optimal agreement in the class of all reinsurance contracts with various premiums calculated using above mentioned principles.
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