A New Rice Variety Developed from an Interspecific Cross, "Hwaweon 2"

종간교잡 유래 중생 다수성 벼 품종 "화원 2호"

  • Ahn, Sang-Nag (Department of Agronomy, College of Agriculture & Life Sciences, Chungnam National University) ;
  • Song, Mi-Hee (Department of Agronomy, College of Agriculture & Life Sciences, Chungnam National 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) ;
  • Park, In-Kyu (Department of Agronomy, College of Agriculture & Life Sciences, Chungnam National University)
  • 안상낙 (충남대학교 농업생명과학대학) ;
  • 송미희 (충남대학교 농업생명과학대학) ;
  • 김동민 (충남대학교 농업생명과학대학) ;
  • 오창식 (충남대학교 농업생명과학대학) ;
  • 강주원 (충남대학교 농업생명과학대학) ;
  • 박인규 (충남대학교 농업생명과학대학)
  • Received : 2009.09.07
  • Published : 20090900

Abstract

"Hwaweon 2" 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 2 is nearly isogenic to Hwaseongbyeo except a small O. rufipogon introgression on chromosome 9. This segment was associated with genes controlling a number of traits including grain weight, heading date, culm length, and spikelets per panicle. 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 2". This cultivar averaged 98cm in culm length and has a medium to late growth duration. This variety is resistant to stripe virus as the recurrent parent. Milled rice of "Hwaweon 2" is translucent and the grain quality traits are comparable to those of the recurrent parent. The yield potential of "Hwaweon 2" in grain is about 7.68 MT/ha at the ordinary fertilizer level about 14% higher than that of Hwaseongbyeo due to increase in grain weight and spikelets per panicle.

"화원2호"는 종간교잡을 통해 화성벼의 근동질계통을 육성하고자 '97년 화성벼와 O. rufipogon을 교배하고, 계속적인 여교배와 MAS를 병행 실시하여 CR121-1-1 계통을 선발하였다. 생산력검정 시험 결과 조사된 형질 중 천립중, 출수기, 간장, 수당립수 등에서 화성벼와 차이를 보이는 화성벼 근동질계통으로, 품종보호원 출원 조건에 부합하여 "화원2호"로 명명하고 품종보호원을 출원하였다. 화원 2호는 중간모본 혹은 분자연구를 위한 재료로서도 유용할 것이다. 1. 출수기는 보통기재배에서 8월 16일로 "화성벼보다 6일 정도 늦은 중만생종 품종이다. 2. 천립중은 24.4 g으로 "화성벼"보다 1.9 g 정도 증가하였으며 간장, 수당립수 등에서도 화성벼와 차이를 보였다. 3. 흰잎마름병에는 이병성이며, 줄무늬잎마름병에는 저항성이다. 5. 도정 특성, 아밀로스 함량은 화성벼와 비슷한 수준이다. 6. "화원 2호"의 정조수량은 '05~'06년 2개년간 실시한 생산력검정 시험에서 평균 7.68 MT/ha로 "화성벼" 대비 114% 수준이었다.

Keywords

References

  1. Brar DS and Khush GS. 1997. Alien introgression in rice. Plant Mol. Biol. 35:35-471 https://doi.org/10.1023/A:1005825519998
  2. Cho YC, Suh JP, Choi IS, Hong HC, Baek MK, Kang KH, Kim YG, Ahn SN, Choi HC, Hwang HG and Moon HP. 2003. QTLs analysis of yield and its related traits in wild rice relative Oryza rufipogon. Treat. Crop. Res. 4:19-29
  3. Rural Development Administration. 2005. Report on Collaborative Research of New Cultivar Development (Rice)
  4. Xie X, Jin F, Song MH, Suh JP, Hwang HG, Kim YG, McCouch SR, and Ahn SN. 2008. Fine mapping of a yield enhancing QTL cluster associated with transgressive variation in an Oryza sativa x O. rufipogon cross. Theor. Appl. Genet. 116:613-622 https://doi.org/10.1007/s00122-007-0695-x