Korean Journal of Breeding Science

쓰러짐과 불마름병에 강한 아주까리콩 ‘까리1호’ Lodging and Bacterial Pustule Resistant Soybean Cultivar ‘Kkari1ho’ with a Net-Like Cracking Seed Coat: Jihee Park, Jeong Hyun Seo, Beom Kyu Kang, Jun Hoi Kim, Su Vin Heo, Won Young Han, Myoung Hee Lee, Ga Eun Kim, Tae Joung Ha, Jung Sook Sung, Ki Young Kim; Korean. J. Breed. Sci. 2026;58(2):209-217.
Published online June 1, 2026; DOI: https://doi.org/10.9787/KJBS.2026.58.2.209

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‘Kkari1ho’ is a net-like, cracking-patterned seed-coated soybean cultivar developed from a crossing of ‘Cheongja3ho’ and ‘IT105279 (landrace)’ in 2009. The F1 and F2 populations were grown for two years, and promising lines were selected using the pedigree method from F3 to F5. A preliminary yield trial (PYT) and an advanced yield trial (AYT) were conducted from 2016 to 2017, and a regional yield trial (RYT) was conducted in seven regions from 2018 to 2020. ‘Kkari1ho’ is determinate, has an oval leaflet shape, purple flowers, and net-like cracking-patterned seeds. The flowering and maturation dates were August 3 and October 23, respectively. For quantitative characteristics, ‘Kkari1ho’ had a smaller seed weight (32.7 g/100 seeds), while its plant height and first pod height were similar to those of ‘Cheongja3ho.’ While ‘Kkari1ho’ was highly resistant to lodging under standard field conditions, its lodging resistance tended to decrease in high-density plots. Regarding pod shattering, ‘Kkari1ho’ exhibited higher resistance than ‘Cheongja3ho’ in both RYT field and indoor tests. ‘Kkari1ho’ showed comparable resistance to bacterial pustule to that of ‘Cheongja3ho’ in both field and artificial inoculation tests. In contrast, its resistance to soybean mosaic virus (G6H strain) was lower in inoculation tests but comparable in field tests. The mean yield of ‘Kkari1ho’ in the RYT was 252 kg/10a, which was a 4% higher mean yield across the region than that of ‘Cheongja3ho.’ ‘Kkari1ho’ is expected to replace landraces due to its resistance to lodging and bacterial pustule (Registration number: 9450).

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배추 완전장 유전자 과발현 애기장대 형질전환체 활용 내염성 유전자 선발 및 유채 형질전환 Functional Screening of Salt Stress Tolerance Genes Using Transgenic Arabidopsis thaliana Lines Overexpressing Brassica rapa Full-length Genes and Brassica napus Transfor: Joon Ki Hong, Myung-Ho Lim, Eun Jung Suh, Hye-Jin Yoon, Jihee Park, Yeon-Hee Lee; Korean. J. Breed. Sci. 2020;52(4):297-309. Published online December 1, 2020; DOI: https://doi.org/10.9787/KJBS.2020.52.4.297

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Given that soil salinity significantly limits plant growth and production in agricultural land, research on salt stress is of particular agricultural relevance. In this study, for the purposes of functional screening of genes involved in salt stress responses, we selected approximately 651 transgenic Arabidopsis lines (157 independent full-length) from a transgenic Arabidopsis population overexpressing full-length Brassica rapa cDNAs. Initial screening indicated that the transgenic lines of 12 genes showed apparent salt tolerance phenotypes when exposed to NaCl at a concentration of 125 mM, among which, two genes (BrATL30 and BrZHD10) were selected for detailed characterization. The T₃ progeny of these transgenic lines exhibited accelerated seed germination, often accompanied by faster root growth and higher survival rate, compared with wild-type plants under salt stress. Additionally, in order to examine the agricultural potential of the two selected B. rapa genes, we constructed BrATL30- and BrZHD10-overexpressing Brassica napus transgenic plants (BrATL30-OX and BrZHD10-OX), which showed apparent high salt stress-tolerant phenotypes compared with wild-type plants. Furthermore, we found that the basal expression of several salt- and abiotic stress-responsive genes was higher in transgenic plants than in wild-type plants. Taken together, this study will provide two valuable functional genes related to salt stress tolerance.

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Genome-wide identification of a novel Na+ transporter from Bienertia sinuspersici and overexpression of BsHKT1;2 improved salt tolerance in Brassica rapa
Vadivelmurugan Irulappan, Hyun Woo Park, Sang-Yun Han, Myung-Hee Kim, Jung Sun Kim
Frontiers in Plant Science.2023;[Epub] CrossRef

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배추 유전자 발현이 배추 개화시기에 미치는 영향 Effects of Overexpression of Brassica Rapa SHORT VEGETATIVE PHASE Gene on Flowering Time: Joon Ki Hong, Sang-Ryeol Park, Eun Jung Suh, Jihee Park, Yeon-Hee Lee; Korean. J. Breed. Sci. 2020;52(3):244-251. Published online September 1, 2020; DOI: https://doi.org/10.9787/KJBS.2020.52.3.244

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AbstractThe SHORT VEGETATIVE PHASE (SVP) gene encodes a MADS-box gene family of transcription factors that repress floral transition. To explore the function of the Brassica rapa SVP (BrSVP) gene during the flowering time of this species, a construct containing BrSVP under the control of the cauliflower mosaic virus 35S promoter was introduced into B. rapa via Agrobacterium-mediated transformation. The resulting transgenic plants showed delayed flowering time, and RT-PCR analyses further revealed that BrSVP repressed the expression of the floral integrator genes AGL20, AGL24, and FT during vernalization. Our data indicated that BrSVP acts as a negative regulator in the flowering time of B. rapa and that it may therefore be a useful genetic source for crop improvement with respect to flowering time regulation.

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Whole genome resequencing analysis of tobacco K326 and its cold sensitive mutant M18
Hui Yin, Xiuping Li, Yue Wang, Jianlin Wang, Zhengyu Deng, Zhimin Chen, Haocun Tang, Luping Zhu, Risheng Hu, Zhengrong Hu
Frontiers in Plant Science.2026;[Epub] CrossRef
Research Progress on the Regulation of Plant Floral Organ Development by the MADS-box Gene Family
Qiufei Wu, Yi Wu, Rui Li, Hongxing Cao, Zongming Li, Qihong Li, Lixia Zhou
International Journal of Molecular Sciences.2025; 26(18): 8946. CrossRef
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Agriculture.2022; 12(12): 2140. CrossRef

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신육종 기술 및 작물 개발 동향 Current Status of New Plant Breeding Technologies and Crop Development: Sang-Ryeol Park, Jihee Park, Sun-Hyung Lim, Jong-Yeol Lee, Beom-Gi Kim; Korean. J. Breed. Sci. 2019;51(3):161-174. Published online September 1, 2019; DOI: https://doi.org/10.9787/KJBS.2019.51.3.161

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In recent years, new plant breeding technologies (NPBT) have had enormous effects on breeding and the agricultural industry. In particular, genome editing technology, including site-directed nuclease technologies, has progressed dramatically since the first-generation Zinc finger nucleases to the third-generation clustered regularly interspaced short palindromic repeats/CRISPR-associated protein 9 (CRISPR/Cas9). CRISPR/Cas9 technology has yielded a revolutionary breakthrough in the accurate, efficient, and user-friendly genome editing of eukaryotes. Several methods for basic research and applications, such as knock-out, base editing, gene targeting, and transcriptional activation or repression have been derived from CRISPR/Cas9 technology. Herein, we will describe the current progress in NPBTs and also summarize the crops developed by NPBTs. After analyzing the current status of NPBTs and crop development, we have proposed potential strategies for crop development using NPBTs.

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Korean Journal of Breeding Science.2024; 56(4): 491. CrossRef
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Horticulture Research.2024;[Epub] CrossRef
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Plant Biotechnology Reports.2022; 16(4): 357. CrossRef