Author : Puji Lestari, Angelita

Summary : Quality of rice grain in determined by physical appearance and chemical content of the grain. Generally, consumers prefer good quality rice grain. Therefore, rice breeding program will focus on not only quality, but also on quality of rice grains. Good quality of rice grain in the market is identified by consumers from their aroma and taste. The objectives of this research were to evaluate the level of grain yield and aromatic character of rice grain of breeding lines, to study the stability of yielding ability aromatic character, and yield potential of NPT lines in response to different environmental condition. The study was conducted from July 2009 through April 2010, at two planting seasons (2009 DS and 2009/2030 WS), in two locations, Bogor (200 m ASL) and Pusakanagara (8 m ASL). The design used was Randomized Complete Block Design (RCBD), with three replications. The study tested 35 NPT aromatic lines and two varieties Ciherang and Sintanur as check varieties. The 21 day-old seedlings were planted one seed per hole, at a spacing of 20 cm x 20 cm. The size of the experiment plots planted to NPT lines was 2 x 5 m² per line. Stability of all characters was analyzed using regression in coefficient (bi), average value of yield and AMMI. Aroma was analyzed by using three methods, namely leaf aroma with KOH, rice aroma test in the tube and cooked rice. Crops protection against pests and diseases were controlled optimally. Coefficient of genetic variation (CGV), heritability, and genetic advance were high for productive tillers, number of filled and total grain per panicle. There was a positive correlation between those characters and grain yields. There were lines more than Ciherang, But mostly did not differ significantly, i.e. IPB 116-F 3-1, IPB 116-F 46-1, IPB 117-F 14-2, IPB 117-F 17-4 and MR-B11738-1-2-Si-1-2. Stability analysis of Finlay-Wilkinson and AMMI did not show the same results of lines stability.