Judul: Introduction Gene of Submergence-Tolerant (Sub1) on Ciherang Rice Varieties.
Abstrak: Upaya untuk meningkatkan produksi padi terus dilakukan seiring dengan bertambahnya penduduk dan meningkatnya kebutuhan beras. Perubahan iklim yang tidak menentu menuntut perlunya pengembangan padi yang toleran terhadap cekaman abiotik, seperti kekeringan, salinitas tinggi, maupun genangan. Hasil panen rendah dan resiko kegagalan tanam akibat banjir umum ditemui pada areal rawa pasang surut, rawa lebak, dan tepian sungai. Salah satu solusi yang berkelanjutan dan permanen adalah mengembangkan varietas dengan hasil tinggi yang toleran terhadap rendaman. Penelitian ini mengembangkan padi Ciherang toleran genangan yang dilakukan secara spesifik dengan metode persilangan terarah (site-directed crossing) untuk menghindari produk transgenik. Penelitian ini bertujuan memperoleh tanaman BC3F1 Ciherang-Sub1 hasil persilangan balik BC2F1 Ciherang-Sub1 dan Ciherang serta menyeleksi tanaman BC3F1 yang membawa gen Sub1 dengan menggunakan PCR. Hasil uji genangan diperoleh 13 tanaman BC3F1 yaitu 6 tanaman BC3F1 Ciherang/Swarna-Sub1 dan 7 tanaman BC3F1 Ciherang/IR64-Sub1. Hasil PCR dengan marka AEX1F dan AEX1R menunjukkan pita DNA untuk gen Sub1A yang berukuran 231 bp. Sedangkan hasil PCR dengan marka gabungan RM219F dan AEX1R dapat membedakan sifat heterozigot antara padi host Ciherang, donor Swarna-Sub1 dan IR64-Sub1, serta progeni BC3F1 Ciherang-Sub1 dengan tambahan pita yang menunjukkan penyisipan Sub1 dari donor ke dalam host.
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Judul: Identifikasi dan Karakterisasi Gen Toleran Genangan Populasi Padi BC4F1 Ciherang-Sub1
Abstrak: Submergence stress is one of the inhibitor factor at rice productivity. Therefore, in order to improve food security, the rice of submergence-tolerant need to be developed. Introduction of gene related to submergence-tolerant (Sub1) was done by site-directed crossing between Ciherang rice as host with rice IR64-Sub1 and Swarna-Sub1 as Sub1 donor. The aim of this study was to identify and characterize BC4F1 Ciherang-Sub1 that resulted from backcross between BC3F1 Ciherang-Sub1 and Ciherang. The existence of Sub1 gene was detected by using PCR analysis based on molecular marker that concerned Sub1 gene. Stages of research was started from planting of BC4F1 Ciherang-Sub1 seed, testing of submergence tolerance, isolation of rice DNA, measuring of concentration and purity of rice DNA, and PCR analysis with AEX1 and RM219 markers. The test results of the submergence showed that 15 plants of BC4F1 Ciherang/Swarna-Sub1 and 21 BC4F1 Ciherang/IR64-Sub1. PCR results with markers AEX1R and AEX1F showed that the DNA band sized 231 bp, while the results of PCR with the combined markers AEX1R and RM219F can distinguish heterozygote between Ciherang rice, Swarna-Sub1 and IR64-Sub1.
Keyword: Padi BC4F1, padi IR64-Sub1

Judul: Dynamic New Keynesian Model for Unemployment and Inflation Rate.
Abstrak: This paper deals with a scientific analysis of the equilibrium level of hiring, employment and unemployment. The basic model being used is a standard new Keynesian model, which states that utility function depends on consumptions and working hours. Utility maximization refers to a standard labour supply equation, with the marginal cost’s dynamics on new Keynesian model simply reflects movements in real wages and productivity. Furthermore, trade-off between output and inflation stabilization can be considered using the new Keynesian Phillips curve. Dynamic general equilibrium model is a model that can be used to study interactions between market imperfections and nominal rigidities, which is capable of overcoming the main shortcoming of the standard new Keynesian model. In the general equilibrium model there are three groups of the economy agents, namely households, firms and monetary authority. The results of this research science that bargaining processes between firms and workers will yield optimal wage. Increase in labour will cause wages to fall, but the unemployment rate can be reduced. An increase in the firm’s monopoly power will shift the labour demand curve downward, which will reduce the number of workers that firm is willing to hire for any given bargained wage.
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