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A New Rice Variety 'Hwaweon 4' with Durable Resistance to Rice Blast  

Kim, Dong-Min (Department of Agronomy, College of Agriculture & Life Sciences, Chungnam National University)
Ju, Hong-Guang (Agricultural Department, Agricultural College of Yanbian University)
Kang, Ju-Won (Department of Agronomy, College of Agriculture & Life Sciences, Chungnam National University)
Han, Seong Sook (National Academy of Agricultural Science, RDA)
Ahn, Sang-Nag (Department of Agronomy, College of Agriculture & Life Sciences, Chungnam National University)
Publication Information
Korean Journal of Breeding Science / v.43, no.6, 2011 , pp. 620-624 More about this Journal
Abstract
'Hwaweon 4' was developed from a cross between the African upland cultivar, 'Moroberekan' and 'Ilpumbyeo' based on marker-aided backcross selection. The recurrent parent 'Ilpumbyeo' is a high grain quality cultivar with medium to late maturity. 'Hwaweon 4' is nearly isogenic to 'Ilpumbyeo' except a small Moroberekan introgressed segment on chromosome 4 harboring the resistance gene for blast. The preliminary and replicated yield trial was conducted at Chungnam National University in 2006 and 2007. The local adaptability test was carried out by the National Seed Management Office (NSMO) from 2008 to 2009. This cultivar was registered to NSMO with a cultivar designated as 'Hwaweon 4'. This cultivar averaged 76 cm in culm length and has medium growth duration. Milled rice of 'Hwaweon 4' is translucent and the grain quality traits are comparable to those of the recurrent parent. It has low protein content. The yield potential of 'Hwaweon 4' in grain was about 6.31 MT/ha at the ordinary fertilizer level for two years. This variety showed highly resistance reaction at the blast nursery test at four locations and also at the sequential planting method. This resistance is due to the resistance gene designated as Pi45(t) on chromosome 4 introgressed from the donor parent, 'Moroberekan'. The Pi45(t) gene would be useful inenhancing resistance to blast in rice breeding program.
Keywords
Rice; Hwaweon 4; Marker-assisted selection; Blast; Durable resistance;
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