‘Hwaweon 5’ was developed from a cross between the African upland cultivar, ‘Moroberekan’ and ‘Ilpumbyeo’ basedon marker-aided backcross selection. The recurrent parent ‘Ilpumbyeo’ is a high grain quality cultivar with medium to late maturity.‘Hwaweon 5’ is nearly isogenic to ‘Ilpumbyeo’ except for ‘Moroberekan’ introgressed segments on chromosomes 1, 4 and 6.The Moroberekan segment on Chromosome 4 has a resistance gene for blast. The preliminary and replicated yield trial wasconducted at Chungnam National University in 2006 and 2007. The local adaptability test was carried out by the National SeedManagement Office (NSMO) from 2008 to 2009. This cultivar was registered to NSMO designated as ‘Hwaweon 5’. This cultivaraveraged 78 cm in culm length and has medium growth duration. Milled rice of ‘Hwaweon 5’ is translucent and the grain qualitytraits are comparable to those of the recurrent parent. It has low protein content. The yield potential of ‘Hwaweon 5’ in grainwas about 6.53 MT/ha at the ordinary fertilizer level for two years. This variety showed highly resistance reaction at the blastnursery test at four locations and also at the sequential planting method. This resistance is due to the gene designated as Pi45(t)on chromosome 4 from Moroberekan. The Pi45(t) gene will be useful in enhancing resistance to blast in rice breeding program.
