Korean Journal of Breeding Science

"Resistance gene"

Articles

저항성 유전자 도입과 벼 후대계통의 열악형질간의 관계분석 Effect of Resistance Genes on the Occurrence of Rice Undesirable Characters in a Wide Cross: Chang-Min Lee, Hyun-Su Park, Man-Kee Baek, Jung-Pil Suh, O-Young Jeong, Song-Joong Yun, Suk-Man Kim; Korean. J. Breed. Sci. 2021;53(4):392-403.
Published online December 1, 2021; DOI: https://doi.org/10.9787/KJBS.2021.53.4.392

Interspecific and intersubspecific crosses have been an important strategy for rice breeding programs to obtain useful characters by expanding genetic diversity. However, the wide cross routinely causes undesirable characters in rice, such as spikelet sterility and poor quality. In this study, we developed near-isogenic lines of R-gene (Xa4+xa5+Xa21+Pi40+Bph18) introgression population to investigate the genetic relationship between the occurrence of poor characters and R-genes induced by MAS. The ANOVA analysis revealed that Pi40, Bph18, and Xa4 were associated with spikelet fertility (SF), ratio of ripened grain (RRG), third internode length (TIL), panicle extraction (PE), and protein content (Pro), whereas others showed no association with the 14 traits tested. In the three-way ANOVA, the impact of two R-genes (Pi40 and Bph18) on the poor characters was independent, with no interaction with others. Quantitative trait locus (QTL) analysis identified QTLs for PE and TIL traits near Pi40, and in particular, QTLs for five traits (SF, RRG, TIL, PE, and Pro) were negatively affected around Bph18. The occurrence of a poor character in R-gene pyramiding lines could be associated with linkage drag caused by the Bph18 gene. We speculate that the development of DNA markers that effectively eliminate poor characters will not only improve breeding efficiency using MAS, but will also help improve traits of japonica rice through wide crossing.

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Association Analysis of Yield-Related Traits in Rice Following the Introduction of Brown Planthopper Resistant Genes
Jae-Ryoung Park, Jeonghwan Seo, Chang-Min Lee, Songhee Park, Mina Jin, Keon Mi Lee, O-Young Jeong, Jung-Pil Suh, Hyun-Su Park
Korean Journal of Breeding Science.2024; 56(4): 381. CrossRef

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벼 단인자 계통과 우량 벼 품종의 도열병 저항성 분석을 통한 안정 저항성 유전자 탐색 Identification of Stable Resistance Genes Based on Resistance Evaluation to Blast for Monogenic Lines and Leading Japonica Varieties in Rice: Man-Kee Baek, Hyun-Su Park, Chang-Min Lee, Hyo-Jeong Lee, Jong-Min Jeong, Eok-Keun Ahn, Wong-Jo Hyun, Ji-Yoon Lee, O-Young Jeong, Ji-Ung Jeung, Jeom-Ho Lee, Young-Chan Cho; Korean. J. Breed. Sci. 2021;53(3):217-229.
Published online September 1, 2021; DOI: https://doi.org/10.9787/KJBS.2021.53.3.217

Rice is the most important staple food in Korea. Rice blast, caused by Magnaporthe oryzae, is one of the most devastating diseases in the rice-growing world and in Korea. Eighteen major blast resistance genes were screened in 33 leading Korean japonica varieties using 44 DNA markers. The 33 leading japonica varieties are cultivated in 659,642 ha (90.4%), and a variety of Samkwang is cultivated widely on a nation-wide scale. Four resistance genes, Pia, Pib, Pi19, and Pb1, were detected in 10-21 varieties, and the R-genes of Pii, Pish, Pita/Pita-2, Piz/Piz-t, Pi35, and Pi65(t), were present in 2-5 varieties. Five R-genes, Pit, Pi5, Pi9, pi21, and Pi40, were not detected in the Korean japonica rice varieties. A total of six varieties, two mid-late flowering varieties, Ilmi and Saeilmi, a medium flowering variety Gopum; and three early flowering varieties Jopyeong, Haedamssal, and Haedeul; were resistant to blast nursery screening over 12 years. A variety of Gopum harbored alleles for Piz/Piz-t, and three early flowering varieties, Jopyeong, Haedamssal, and Haedeul, had extensive loci of the multiple-gene family Piz/Piz-t, Pi9, and Pi40 on chromosome 6. Two mid-late flowering varieties, Ilmi and Saeilmi, harbored the Pita-2 gene, and Gopum had Pita. In the japonica rice breeding program, an effective means for enhancing stable resistance to blast would be introduced to 2-3 R genes among resistance genes Pit, Pi5, Pi9, pi21 and Pi40 which were not identified in Korean japonica rice varieties, and resistance genes Pita/Pita-2, Piz-t/Piz-5, to 2-3 R genes among and Pi20 that showed stable resistance in monogenic IRBL lines.

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Disease Incidence and Race Diversity of Rice Blast in Korea from 2020 to 2022
Dan-Dan Zhao, Hyunjung Chung, Nam-Gu Kim, Woo-Il Lee, Soo Yeon Choi, Shinhwa Kim, Sang-Min Kim, Jae Buhm Chun, Nak-Jung Choi, Ju-Rak Lim, Bo Yoon Seo, Ju-Yeon Yoon
Plant Disease.2026;[Epub] CrossRef
GWAS analysis reveals the genetic basis of blast resistance associated with heading date in rice
Seung Young Lee, Gileung Lee, Jiheon Han, Su-Kyung Ha, Chang-Min Lee, Kyeongmin Kang, Mina Jin, Jung-Pil Suh, Ji-Ung Jeung, Youngjun Mo, Hyun-Sook Lee
Frontiers in Plant Science.2024;[Epub] CrossRef
Comparative analysis of metabolite profiling and free radical scavenging activity in phenotypic variants of OsCOP1 colored rice mutant seed
Yun-Ju Kim, Seung-Hyun Kim, Backki Kim, Hee-Jong Koh, Won-Ryeol Kim, Ji-Ye Kim, Ill-Min Chung
Food Chemistry.2023; 425: 136465. CrossRef
Varietal differences of japonica rice: Intrinsic sensory and physicochemical properties and their changes at different temperatures
Ah-Na Kim, Oui Woung Kim, Hoon Kim
Journal of Cereal Science.2023; 109: 103603. CrossRef
Research Advances in Improving Disease Resistance and Abiotic Stress Tolerance Using CRISPR/Cas9 Gene Editing in Rice
Yurim Kim, Sieun Choi, In Sun Yoon, Song Lim Kim, Youngjun Mo
Korean Journal of Breeding Science.2022; 54(4): 331. CrossRef
Evaluation of Molecular Markers Linked to Rice Blast Resistance Gene in Korean Rice Varieties
Hyun-Sook Lee, Su-Kyung Ha, Chang-Min Lee, Hyun-Su Park, Ji-Ung Jeung
Korean Journal of Breeding Science.2022; 54(4): 375. CrossRef
Analysis of Rice Blast Outbreaks in Korea through Text Mining
Sungmin Song, Hyunjung Chung, Kwang-Hyung Kim, Ki-Tae Kim
Research in Plant Disease.2022; 28(3): 113. CrossRef

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벼흰잎마름병 저항성 유전자 집적 고품질 중만생 벼 ‘신진백’ Bacterial Blight Resistance Genes Pyramided in Mid-Late Maturing Rice Cultivar ‘Sinjinbaek’ with High Grain Quality: Hyun-Su Park, Ki-Young Kim, Man-Kee Baek, Young-Chan Cho, Bo-Kyeong Kim, Jeong-Kwon Nam, Woon-Chul Shin, Woo-Jae Kim, Jong-Cheol Ko, Jeong-Ju Kim, Jong-Min Jeong, Ji-Ung Jeung, Keon-Mi Lee, Seul-Gi Park, Chang-Min Lee, Choon-Song Kim, Jung-Pil Suh, Jeom-Ho Lee; Korean. J. Breed. Sci. 2019;51(3):263-276. Published online September 1, 2019; DOI: https://doi.org/10.9787/KJBS.2019.51.3.263

Abstract
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‘Sinjinbaek’ is a bacterial blight (BB)-resistant, mid-late maturing rice cultivar with high grain quality. To diversify the resistance genes and enhance the resistance of Korean rice cultivars against BB, ‘Sinjinbaek’ was developed from a cross between ‘Iksan493’ (cultivar name ‘Jinbaek’) and the F₁ cross between ‘Hopum’ and ‘HR24670-9-2-1’ (‘HR24670’). ‘Jinbaek’ is a BB-resistant cultivar with two BB resistance genes, Xa3 and xa5. ‘Hopum’ is a high grain quality cultivar with the Xa3 resistance gene. ‘HR24670’ is a near-isogenic line that carries the Xa21 gene, a resistance gene inherited from a wild rice species O. longistaminata, in the genetic background of japonica elite rice line ‘Suweon345’. ‘Sinjinbaek’ was selected through the pedigree method, yield trials, and local adaptability tests. Using bioassay for BB races and DNA markers for resistance genes, three resistance genes, Xa3, xa5, and Xa21, were pyramided in the ‘Sinjinbaek’ cultivar. ‘Sinjinbaek’ exhibited high-level and broad-spectrum resistance against BB, including the K3a race, the most virulent race in Korea. ‘Sinjinbaek’ is a mid-late maturing rice cultivar tolerant to lodging. It has multiple disease resistance against BB, rice blast, and stripe virus. The yield of ‘Sinjinbaek’ was similar to that of ‘Nampyeong’. ‘Sinjinbaek’ showed excellent grain appearance, good taste of cooked rice, and enhanced milling performance, and we concluded that it could contribute to improving the quality of BB-resistant cultivars. ‘Sinjinbaek’ was successfully introgressed with the Xa21 gene without the linkage drag negatively affecting its agronomic characteristics. ‘Sinjinbaek’ improved the resistance of Korean rice cultivars against BB by introgression of a new resistance gene, Xa21, as well as by pyramiding three resistance genes, Xa3, xa5, and Xa21. ‘Sinjinbaek’ would be suitable for the cultivation in BB-prone areas since it has been used in breeding programs for enhancing plants’ resistance to BB (Registration No. 7273).

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BMC Plant Biology.2025;[Epub] CrossRef
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Quantitative Trait Locus Analysis for Quality-Related Traits Using the Recombinant Inbred Lines Derived from a Cross between “Boramchan” and “Pecos” Japonica Rice
Hyun-Su Park, Chang-Min Lee, Jeonghwan Seo, Songhee Park, Hyeonso Ji, Keon-Mi Lee, Jae-Ryoung Park, O-Young Jeong
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Mid-Late Maturing Japonica Rice Cultivar ‘JJ625LG’ with Long and Spindle-Shaped Grains
Hyun-Su Park, Man-Kee Baek, Jung-Pil Suh, O-Young Jeong, Chang-Min Lee, Choon-Song Kim, Ji-Ung Jeung, Woo-Jae Kim, Jong-Min Jeong, Youngjun Mo, Su-Keyong Ha, Hyun Gu Choi, Seul-Gi Park, Mina Jin, Jae-Ryoung Park, Jeonghwan Seo, Songhee Park
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Mid-Late Maturing Glutinous Rice Cultivar ‘JJ644wx’ with Multiple Disease Resistance and Lodging Tolerance
Hyun-Su Park, Chang-Min Lee, O-Young Jeong, Jung-Pil Suh, Jeonghwan Seo, Songhee Park, Keon-Mi Lee, Jae-Ryoung Park, Su-Kyung Ha, Hyun-Sook Lee, Ki-Young Kim
Korean Journal of Breeding Science.2024; 56(3): 319. CrossRef
Quantitative Trait Loci Analysis of Quality-Related Traits Using Recombinant Inbred Lines Derived from a Cross between ‘Chamdongjin’ and ‘Younghojinmi’
Hyun-Su Park, Jeonghwan Seo, Chang-Min Lee, Songhee Park, Keon-Mi Lee, Jae-Ryoung Park, O-Young Jeong
Korean Journal of Breeding Science.2024; 56(4): 395. CrossRef
‘Saebonghwang’: A High Grain Quality Mid-Late-Maturing Rice Cultivar Adaptable to Direct Seeding and Transplanting Cultivation
Chang-Min Lee, Choon-Song Kim, Woon-Chul Shin, Man-Kee Baek, Hyun-Su Park, Jong-Cheol Ko, Jeong-Ju Kim, Jung-Pil Suh, O-Young Jeong, Keon-Mi Lee, Jeonghwan Seo, Song-Hee Park, Dongmin Back, Hyeonsoo Jang
Korean Journal of Breeding Science.2024; 56(2): 147. CrossRef
QTL Analysis for Yield-Related Traits Using the Recombinant Inbred Lines Derived From a Cross Between ‘Chamdongjin’ and ‘Younghojinmi’
Hyun-Su Park, Jeonghwan Seo, Songhee Park, Jae-Ryoung Park, Chang-Min Lee, Mina Jin, O-Young Jeong
Korean Journal of Breeding Science.2024; 56(1): 31. CrossRef
The Multiple Disease-resistant, Mid-late Maturing Rice Cultivar ‘Chamdongjin’, Carrying the Bacterial Blight Resistance Gene Xa21, with the Genetic Background of ‘Sindongjin’
Hyun-Su Park, Man-Kee Baek, Woo-Jae Kim, Jung-Pil Suh, Jeom-Ho Lee, Ji-Ung Jeung, Choon-Song Kim, O-Young Jeong, Deok-Ryeol Lee, Chang-Min Lee, Jong-Min Jeong, Young-Jun Mo, Su-Kyung Ha, Dong-Kyu Lee, Hyeonso Ji, Jeonghwan Seo, Jae-Ryoung Park, Hyun-Sook
Korean Journal of Breeding Science.2023; 55(1): 86. CrossRef
High Grain Quality Mid-Late Maturing Rice Cultivar ‘Namchan’ with High Yield Performance under Low-Nitrogen Fertilizer Conditions
Hyun-Su Park, Man-Kee Baek, Chang-Min Lee, Jeonghwan Seo, Songhee Park, Kyeong Min Kang, Jae-Ryoung Park, Mina Jin, O-Young Jeong, Ji-Ung Jeung, Ki-Young Kim
Korean Journal of Breeding Science.2023; 55(4): 389. CrossRef
Mid-Late Maturing High-Yielding Black Rice Cultivar “JJ603Black” with Multiple-Disease Resistance
Hyun-Su Park, Chang-Min Lee, Jeonghwan Seo, Jae-Ryoung Park, Man-Kee Baek, O-Yeong Jeong
Korean Journal of Breeding Science.2022; 54(4): 395. CrossRef
Research Advances in Improving Disease Resistance and Abiotic Stress Tolerance Using CRISPR/Cas9 Gene Editing in Rice
Yurim Kim, Sieun Choi, In Sun Yoon, Song Lim Kim, Youngjun Mo
Korean Journal of Breeding Science.2022; 54(4): 331. CrossRef
Early Maturing Whole Crop Silage Japonica Rice Cultivar 'Jonong' with Short Growth Duration and Numerous Spikelets
Hyun-Su Park, Man-Kee Baek, Woo-Jae Kim, Jeong-Ju Kim, Jong-Min Jeong, Young-Chan Cho, Jong-Cheol Ko, Ji-Ung Jeung, O-Young Jeong, Chang-Min Lee, Suk-Man Kim, Ki-Young Kim, Jeom-Ho Lee
Korean Journal of Breeding Science.2021; 53(3): 318. CrossRef
High Grain Quality Mid-late Maturing Rice Cultivar ‘Yechan’ with Lodging Tolerance and Multiple Disease Resistance
Man-Kee Baek, Hyun-Su Park, Jeong-Kwon Nam, Young-Chan Cho, Ki-Young Kim, Jeong-Ju Kim, Woo-Jae Kim, Woon-Chul Shin, Ji-Ung Jeung, Choon-Song Kim, Jong-Min Jeong, Keon-Mi Lee, Seul-Gi Park, Chang-Min Lee, Jung-Pil Suh, Jeom-Ho Lee
Korean Journal of Breeding Science.2019; 51(4): 504. CrossRef

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Development of japonica Rice Lines with Four Bacterial Blight Resistance Genes using Phenotypic and Marker-assisted Selection: Hyun-Su Park1*, Ki-Young Kim2, Woo-Jae Kim1, Ji-Ung Jeung1, Jong-Hee Lee2, Tae-Hwan Noh1, Jeong-KwonNam1, Man-Kee Baek1, Woon-Cheol Shin1, Jeong-Ju Kim1, Jong-Min Jeong1,Young-Chan Cho1, Bo-Kyeong Kim1, and Sang-Nag Ahn3; Korean. J. Breed. Sci. ;48(2):140-158. Published online June 30, 2016; DOI: https://doi.org/10.9787/KJBS.2016.48.2.140

Abstract
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Four bacterial blight resistance genes, Xa1+Xa3+xa5+Xa21, pyramid elite japonica rice lines were developed for enhancing the resistance of rice against Xanthomonas oryzae pv. oryzae in Korea. Seven doubled haploid (RDL1-7) and ten F6 lines (RPL1-10) having Xa1+Xa3+xa5+Xa21 which were derived from the cross between Ilmi, high grain quality japonica rice cultivar carrying Xa1, and Iksan575, elite line carrying Xa3+xa5+Xa21, were developed using marker-assisted selection for resistance genes and phenotypic selection for bacterial blight resistance and agronomic traits. Among resistance genes combinations in F2 population, four resistance genes combination, Xa1+Xa3+xa5+Xa21, showed the highest resistance and conferred the enhanced resistance than three genes combination, Xa3+xa5+Xa21. Four genes pyramid lines (RDL and RPL) showed broad-spectrum resistant against 16 Korean bacterial blight isolates and the yield and quality of the lines did not alter by the inoculation of K3a, the most virulent race in Korea. In addition, these lines had excellent plant type and exhibited more enhanced yield than previously developed resistant cultivars. Four bacterial blight resistance genes combination, Xa1+Xa3+xa5+Xa21, was efficient and promising combination and developed lines with four genes could be useful materials and will be applied to the breeding programs for enhancing the resistance of japonica rice against bacterial blight.

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‘Drimi9ho’, A Lodging Tolerance with Mid-late Maturing, Improved White-backed Planthopper (Sogatella furcifera) and Cultivation Stability
Jae-Ryoung Park, Eun-Gyeong Kim, Yoon-Hee Jang, Kyung-Min Kim
Korean Journal of Breeding Science.2025; 57(4): 493. CrossRef
Mid-Late Maturing Glutinous Rice Cultivar ‘JJ644wx’ with Multiple Disease Resistance and Lodging Tolerance
Hyun-Su Park, Chang-Min Lee, O-Young Jeong, Jung-Pil Suh, Jeonghwan Seo, Songhee Park, Keon-Mi Lee, Jae-Ryoung Park, Su-Kyung Ha, Hyun-Sook Lee, Ki-Young Kim
Korean Journal of Breeding Science.2024; 56(3): 319. CrossRef
The Multiple Disease-resistant, Mid-late Maturing Rice Cultivar ‘Chamdongjin’, Carrying the Bacterial Blight Resistance Gene Xa21, with the Genetic Background of ‘Sindongjin’
Hyun-Su Park, Man-Kee Baek, Woo-Jae Kim, Jung-Pil Suh, Jeom-Ho Lee, Ji-Ung Jeung, Choon-Song Kim, O-Young Jeong, Deok-Ryeol Lee, Chang-Min Lee, Jong-Min Jeong, Young-Jun Mo, Su-Kyung Ha, Dong-Kyu Lee, Hyeonso Ji, Jeonghwan Seo, Jae-Ryoung Park, Hyun-Sook
Korean Journal of Breeding Science.2023; 55(1): 86. CrossRef
Breeding a Giant Embryo and Multi-disease-resistant Rice Cultivar, ‘Drimi4ho’
Eun-Gyeong Kim, Jae-Ryoung Park, Yoon-Hee Jang, Jae-Keun Sohn, Gang-Seob Lee, Kyung-Min Kim
Korean Journal of Breeding Science.2023; 55(1): 36. CrossRef
Mid-Late Maturing High-Yielding Black Rice Cultivar “JJ603Black” with Multiple-Disease Resistance
Hyun-Su Park, Chang-Min Lee, Jeonghwan Seo, Jae-Ryoung Park, Man-Kee Baek, O-Yeong Jeong
Korean Journal of Breeding Science.2022; 54(4): 395. CrossRef
Effect of Resistance Genes on the Occurrence of Rice Undesirable Characters in a Wide Cross
Chang-Min Lee, Hyun-Su Park, Man-Kee Baek, Jung-Pil Suh, O-Young Jeong, Song-Joong Yun, Suk-Man Kim
Korean Journal of Breeding Science.2021; 53(4): 392. CrossRef
Multiple Disease Resistant Early Maturing Rice Cultivar ‘IS592BB’ with the Genetic Background of ‘Unkwang’
Hyun-Su Park, Man-Kee Baek, Woo-Jae Kim, Chang-Min Lee, Hyeonso Ji, Jung-Pil Suh, O-Young Jeong, Young-Chan Cho, Jeom-Ho Lee
Korean Journal of Breeding Science.2020; 52(4): 473. CrossRef
High Grain Quality Mid-late Maturing Rice Cultivar ‘Yechan’ with Lodging Tolerance and Multiple Disease Resistance
Man-Kee Baek, Hyun-Su Park, Jeong-Kwon Nam, Young-Chan Cho, Ki-Young Kim, Jeong-Ju Kim, Woo-Jae Kim, Woon-Chul Shin, Ji-Ung Jeung, Choon-Song Kim, Jong-Min Jeong, Keon-Mi Lee, Seul-Gi Park, Chang-Min Lee, Jung-Pil Suh, Jeom-Ho Lee
Korean Journal of Breeding Science.2019; 51(4): 504. CrossRef
Bacterial Blight-Resistant Medium Maturing Rice Cultivar ‘Haepum’ with High Grain Quality
Jeong-Kwon Nam, Hyun-Su Park, Man-Kee Baek, Young-Chan Cho, Woo-Jae Kim, Jeong-Ju Kim, Bo-Kyeong Kim, Ki-Young Kim, Woon-Chul Shin, Jong-Cheol Ko, Gun-Mi Lee, Seul-Gi Park, Chang-Min Lee, Choon-Song Kim, Jung-Pil Suh, Jeom-Ho Lee
Korean Journal of Breeding Science.2019; 51(3): 222. CrossRef

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벼멸구 저항성 유전자의 유묘기 저항성 반응 Response to Brown Planthopper Resistance Genes at Rice Seedling Stage: Woo-Jae Kim, Hyun-Su Park, Hyeon-Soon Kim, Ki-Yong Ha, Yeong-Chan Cho, Jeom-Ho Lee, Bo-Kyeong Kim; Korean. J. Breed. Sci. 2016;48(1):29-36. Published online March 31, 2016; DOI: https://doi.org/10.9787/KJBS.2016.48.1.029

Abstract
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This experiments were carried out to know the response to Brown Planthopper(BPH) resistance genes at rice seedling stage using Biotype 1 for develoment of resistant cultivars. Varieties with Bph1, Bph3 and Bph18 genes showed a very strong resistance response, BpH2, Bph6, bph7 and Bph9 genes exhibited moderate resistance. Bph5 and Bph8 gene retention varieties and Nampyeongbyeo showed a very weak sensitivity in response to BPH. After 72 hours, Nampyeong(no gene) and IR72(Bph3 gene) were showed a feed-preference 690% and 0%, respectively. Results of Antixenosis and seedling resistance response to BPH were grouped into similar by specific resistance genes. Ten days after inoculation, BPH survival rate of vareities with resistance genes were below 30%, whereas Nampyeongbyeo was more than 70%. The results showed that Bph3 and Bph18 genes are highly resistant response against BPH, these genes are very useful for improve the rice cultivars with various resistance genes

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Breeding a Giant Embryo and Multi-disease-resistant Rice Cultivar, ‘Drimi4ho’
Eun-Gyeong Kim, Jae-Ryoung Park, Yoon-Hee Jang, Jae-Keun Sohn, Gang-Seob Lee, Kyung-Min Kim
Korean Journal of Breeding Science.2023; 55(1): 36. CrossRef
Breeding of ‘Drimi 1ho’, aJaponicaRice Cultivar Resistant to Brown Planthoppers
Yoon-Hee Jang, Jae-Ryoung Park, Eun-Gyeong Kim, Jae-Keun Sohn, Gang-Seob Lee, Kyung-Min Kim
Korean Journal of Breeding Science.2022; 54(3): 215. CrossRef

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평야지 적응성 향상을 위한 벼흰잎마름병 및 줄무늬잎마름병 저항성 유전자 집적 조생 계통 개발 Development of Early Maturing Rice Lines with Genes Conferring Resistance to Bacterial Blight and Rice Stripe Virus for Enhancing the Adaptability in Plain Area: Hyun-Su Park, Jeong-Kwon Nam, Ki-Young Kim, Woo-Jae Kim, Ji-Ung Jeong, Man-Kee Baek, Jeong-Ju Kim, Young-Chan Cho, Jeom-Ho Lee, Bo-Kyeong Kim, Sang-Nag Ahn; Korean. J. Breed. Sci. 2015;47(2):118-127. Published online June 30, 2015; DOI: https://doi.org/10.9787/KJBS.2015.47.2.118

Abstract
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This study was conducted to develop the early maturing rice lines with genes conferring resistance to bacterial blight and rice stripe virus to enhance the adaptability in plain area. Unkwang carrying Xa3 was used as a recurrent parent and SR30075 carrying Xa4+xa5+Xa21+Stvb-i was used as a donor parent. RL1(Resistant Line, BC₁F₇), RL2, RL3, RL4, and RL5(BC₂F₆) were bred through bio-assay of K3a race inoculation and phenotypic selection of agronomic traits. The presence of introduced genes was confirmed by testing the resistance levels against bacterial blight and rice stripe virus and then double-checked by using DNA marker. RL1 has all target genes, Xa3+xa5+Xa21+Stvb-i. RL2, RL3, and RL5 have Xa3+Xa21+Stvb-i whereas RL4 has only Xa21. Rice lines carrying Stvb-i showed resistance reaction to rice stripe virus. The combinations of bacterial blight resistant genes(Xa3+xa5+Xa21 and Xa3+Xa21) were found to be promising, as the rice lines carrying these genes enhanced a strong resistant reaction against 16 bacterial blight isolates. Also, the inoculation of K3a race did not alter the brown rice yield, ripened grain ratio and kernel quality of brown rice compared to control. Although RL1 containing all the target resistance genes showed excellent resistance performance, it is not suitable to cultivate in plain area due to instability to lodging, 80% yield level than Unkwang, and low grain quality. RL5 backcrossed twice with Unkwang was found to be a promising line due to its effective resistance gene combination, Xa3+Xa21+Stvb-i and good agronomic traits such as stability to lodging, higher yield and quality compared to Unkwang.

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The Multiple Disease-resistant, Mid-late Maturing Rice Cultivar ‘Chamdongjin’, Carrying the Bacterial Blight Resistance Gene Xa21, with the Genetic Background of ‘Sindongjin’
Hyun-Su Park, Man-Kee Baek, Woo-Jae Kim, Jung-Pil Suh, Jeom-Ho Lee, Ji-Ung Jeung, Choon-Song Kim, O-Young Jeong, Deok-Ryeol Lee, Chang-Min Lee, Jong-Min Jeong, Young-Jun Mo, Su-Kyung Ha, Dong-Kyu Lee, Hyeonso Ji, Jeonghwan Seo, Jae-Ryoung Park, Hyun-Sook
Korean Journal of Breeding Science.2023; 55(1): 86. CrossRef
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Youngjun Mo, Chang-Min Lee, Hyang-Mi Park, Su-Kyung Ha, Mi-Jung Kim, Jieun Kwak, Hyun-Sook Lee, Jeong-Heui Lee, Ji-Ung Jeung
Plants.2021; 10(11): 2408. CrossRef
Multiple Disease Resistant Early Maturing Rice Cultivar ‘IS592BB’ with the Genetic Background of ‘Unkwang’
Hyun-Su Park, Man-Kee Baek, Woo-Jae Kim, Chang-Min Lee, Hyeonso Ji, Jung-Pil Suh, O-Young Jeong, Young-Chan Cho, Jeom-Ho Lee
Korean Journal of Breeding Science.2020; 52(4): 473. CrossRef
Characterization of Yield and Panicle-related Traits of Early Maturing Rice Varieties by Cultivation Times in the Honam Plain Area of Korea
Hyun-Su Park, Jung-Pil Suh, Man-Kee Baek, Chang-Min Lee, Woo-Jae Kim, Gun-Mi Lee, Suk-Man Kim, Choon-Song Kim, Young-Chan Cho
Korean Journal of Breeding Science.2020; 52(2): 115. CrossRef
Characterization of QTLs and Candidate Genes for Days to Heading in Rice Recombinant Inbred Lines
Youngjun Mo, Jong-Min Jeong, Su-Kyung Ha, Jinhee Kim, Changmin Lee, Gung Pyo Lee, Ji-Ung Jeung
Genes.2020; 11(9): 957. CrossRef
‘Baegilmi’, an Extremely Early Maturing Blast Resistant Rice with Good Grain Appearance
Youngjun Mo, Jong-Min Jeong, Woo-Jae Kim, Bo-Kyeong Kim, Ji-Ung Jeung
Korean Journal of Breeding Science.2019; 51(2): 151. CrossRef
Development of Near-Isogenic Line of japonica Rice Cultivar Saenuri without Lipoxygenase-3
Hyun-Su Park, Keon-Mi Lee, Ki-Young Kim, Jeong-Ju Kim, Woon-Cheol Shin, Man-Kee Baek, Choon-Song Kim, Seul-Gi Park, Chang-Min Lee, Jung-Pil Suh, Young-Chan Cho
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벼흰잎마름병 저항성 유전자 , , , 보유 자포니카 조생 찰벼 계통 육성 Development of Breeding Lines for Early Maturing Glutinous japonica Rice carrying Bacterial Blight Resistance Genes, Xa2, Xa3, xa5, and Xa21: Hyun-Su Park, Ki-Young Kim, Woo-Jae Kim, Jong-Cheol Ko, Jeong-Kwon Nam, Ji-Ung Jeung, Bo-Kyeong Kim, Jeom-Ho Lee; Korean. J. Breed. Sci. 2014;46(3):195-202. Published online September 30, 2014; DOI: https://doi.org/10.9787/KJBS.2014.46.3.195

Abstract
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This study was conducted to develop breeding lines carrying bacterial blight resistance genes, Xa2, Xa3, xa5, and Xa21 for enhancing the resistance of early maturing glutinous japonica rice. Resistant lines were developed by backcrossing into early maturing glutinous elite cultivar, Sangjuchalbyeo and phenotypic selection for bacterial blight resistance and agronomic traits. Selected lines were confirmed the incorporation of the resistance genes using DNA markers and evaluated the resistance reaction against four Korean and eleven Philippine bacterial bight races. HR24465 line carrying Xa2 was resistant to Korean races K1, K2, and Philippine race 9a. HR24666 line carrying Xa3 was moderately resistant or resistant to races except for Korean race K3a and Philippine race 6. Resistant lines carrying xa5 were resistant to all races except for Philippine race 6. HR24669 line carrying Xa21 was moderately resistant or resistant to races except for Korean race K1 and Philippine race 10. Yield-related traits of breeding lines exhibited similar characteristics to Sangjuchalbyeo. These resistant lines could be useful breeding materials for improving the resistance of early maturing glutinous japonica rice against Xanthomonas oryzae pv. oryzae.