‘Baegilmi’, an Extremely Early Maturing Blast Resistant Rice with Good Grain Appearance

Baegilmi’ is an extremely early maturing rice variety that can be harvested within 100 days after transplanting, and also exhibits strong blast resistance and good grain appearance. From a mutant population of ‘Koshihikari’ treated with ethyl methanesulfonate, a promising line, ‘Suweon 559’, was selected through pedigree breeding and yield trials, and subsequently registered as ‘Baegilmi’. According to the 3-year (2012–2014) regional adaptability tests, the average heading date of Baegilmi in ordinary planting was July 14 th , which was 23 and 9 days earlier than that of the check varieties ‘Hwaseong’ and ‘Odae’, respectively. The milled rice yield of ‘Baegilmi’ was 4.53 MT/ha in ordinary planting (83% and 98% of ‘Hwaseong’ and ‘Odae’, respectively). ‘Baegilmi’ had a culm length of 75 cm (10 cm shorter than ‘Hwaseong’), a panicle length of 21 cm (similar to ‘Hwaseong’), and 12 panicles per plant (two fewer than ‘Hwaseong’). The brown rice of ‘Baegilmi’ was slightly more slender than ‘Hwaseong’, with a 1,000 grain weight of 20.6 g and length/width ratio of 1.92. The milled rice of ‘Baegilmi’ was translucent, with a protein content of 8.4% (1.7% higher than ‘Hwaseong’) and an amylose content of 18.6% (similar to ‘Hwaseong’). ‘Baegilmi’ exhibited strong blast resistance, but was susceptible to bacterial blight, viral diseases, and insect pests. The release of ‘Baegilmi’ is expected to provide a useful early-maturing rice variety that can be used in diverse cropping systems in paddy fields (Registration No. 6805).

[1]  Dong-Soo Park,et al.  ‘Hwawang’: A Good Quality and Early-Maturing Rice Variety Adaptable for Rice–Cash Crop Rotation System , 2018, Korean Journal of Breeding Science.

[2]  J. Jeung,et al.  Multiple Disease Resistant Early Maturing Rice Cultivar 'Joil' with High Grain Quality Adaptable to Early Transplanting Cultivation in the Southern Plain Area , 2018, Korean Journal of Breeding Science.

[3]  M. Yano,et al.  Koshihikari: a premium short-grain rice cultivar – its expansion and breeding in Japan , 2018, Rice.

[4]  Hee-Dong Kim,et al.  A Medium-Maturing, Lodging Tolerant, and Good Eating-Quality Rice Variety 'Matdream' , 2012, Korean Journal of Breeding Science.

[5]  Jeong JongMin,et al.  Blast resistant early maturing rice 'Jungmo1024' with high temperature tolerance during grain filling stage. , 2016 .

[6]  Kim Ki-young,et al.  Development of early maturing rice lines with genes conferring resistance to bacterial blight and rice stripe virus for enhancing the adaptability in plain area. , 2015 .

[7]  Y. Oh,et al.  Study of the Use of Winter Forage Crops, Early Maturing Rice and Summer Oats in Triple Cropping Systems at Paddy Field in Southern Region , 2014 .

[8]  Bo Kyeong Kim,et al.  A new early-maturing rice with blast, bacterial blight, rice stripe virus resistant and high grain quality, 'Jopyeong'. , 2013 .

[9]  B. Walker,et al.  Rural Industries Research and Development Corporation , 2011 .

[10]  Y. Takeuchi.  Developing Isogenic Lines of Japanese Rice Cultivar 'Koshihikari' with Early and Late Heading , 2011 .

[11]  M. Tomita.  Introgression of green revolution sd1 gene into isogenic genome of rice super cultivar Koshihikari to create novel semidwarf cultivar 'Hikarishinseiki' (Koshihikari-sd1). , 2009 .

[12]  Dong-Soo Park,et al.  Yield and Grain Quality of Early Maturing Rice Cultivars as Affected by Early Transplanting in Yeongnam Plain Area , 2008 .

[13]  Takaaki Matsui,et al.  Breeding of Blast Resistant Isogenic Lines in Rice Variety “Koshihikari” and Evaluation of Their Characters , 2005 .

[14]  최성호,et al.  Durability of Rice Cultivars to Blast in Korea by Sequential Planting Method , 2004 .

[15]  H. Satoh,et al.  Isolation and characterization of rice lesion-mimic mutants with enhanced resistance to rice blast and bacterial blight , 2002 .

[16]  T. Tanisaka,et al.  Gene Analysis for the Semidwarfism of Two Mutant Strains, Hokuriku 100 and Kanto 79, Induced from a Rice Variety Koshihikari : Studies on the Utility of Artificial Mutations in Plant Breeding XVIII , 1990 .