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A New Medium-maturity Rice Cultivar Developed from an Interspecific Cross, "Hwaweon 1"  

Ahn, Sang-Nag (Department of Agronomy, College of Agriculture & Life Sciences, Chungnam National University)
Ju, Hong-Guang (Department of Agronomy, College of Agriculture & Life Sciences, Chungnam National University, Agricultural Department, Agricultural College of Yanbian University)
Kim, Dong-Min (Department of Agronomy, College of Agriculture & Life Sciences, Chungnam National University)
Oh, Chang-Sik (Department of Agronomy, College of Agriculture & Life Sciences, Chungnam National University)
Kang, Ju-Won (Department of Agronomy, College of Agriculture & Life Sciences, Chungnam National University)
Jin, Feng-Xue (Department of Agronomy, College of Agriculture & Life Sciences, Chungnam National University)
Oh, Ji-Min (Department of Agronomy, College of Agriculture & Life Sciences, Chungnam National University)
Publication Information
Korean Journal of Breeding Science / v.41, no.3, 2009 , pp. 338-341 More about this Journal
Abstract
"Hwaweon 1" was developed from an interspecific cross between Hwaseongbyeo and a wild species, Oryza rufipogon L. (IRGC 105491) based on marker-aided selection. The recurrent parent "Hwaseongbyeo" is a high grain quality cultivar with medium-maturity. Hwaweon 1 is nearly isogenic to Hwaseongbyeo except a small O. rufipogon introgression on chromosome 8 harboring the gene for grain weight. The preliminary and replicated yield trial was conducted at Chungnam National University in 2004, 2005 and 2006. The local adaptability test was carried out by the National Seed Management Office (NSMO) in 2007 and 2008. This cultivar was registered to NSMO with a cultivar designated as "Hwaweon 1". This cultivar averaged 89 cm in culm length and has a medium growth duration. This cultivar is resistant to stripe virus as the recurrent parent, Hwaseongbyeo. Milled rice of "Hwaweon 1" is translucent and the grain quality traits are comparable to those of the recurrent parent. The yield potential of "Hwaweon 1" in grain is about 7.43 MT/ha at the ordinary fertilizer level about 10% higher than that of Hwaseongbyeo mainly due to increase in grain weight.
Keywords
Rice; Hwaweon 1; interspecific cross; Good quality; Oryza rufipogon;
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