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Pod Shattering Tolerant Black Soybean Cultivar ‘Cheongja4’ with Green Cotyledon and without Seed Coat Cracking
종피가 터지지 않고 탈립에 강한 녹자엽 검정콩 ‘청자4호’
Korean J Breed Sci 2018;50(3):289-295
Published online September 1, 2018
© 2018 Korean Society of Breeding Science.

Hyun Tae Kim, Won Young Han, Jeong Hyun Seo*, Beom Kyu Kang, Sang Ouk Shin, Hong Sik Kim, Yeong Hoon Lee, Byoung Won Lee, Hong Tai Yun, Chang Hwan Park, and Do Yeon Kwak
김현태, 한원영, 서정현*, 강범규, 신상욱, 김홍식, 이영훈, 이병원, 윤홍태, 박장환, 곽도연

National Institute of Crop Science (NICS), RDA, Jeonju 55365, Korea
농촌진흥청 국립식량과학원
Correspondence to: (E-mail:, Tel: +82-55-350-1236, Fax: +82-55-353-3050)
Received May 10, 2018; Accepted July 20, 2018.
This is an Open-Access article distributed under the terms of the Creative Commons Attribution Non-Commercial License ( which permits unrestricted non-commercial use, distribution, and reproduction in any medium, provided the original work is properly cited.
‘Cheongja4’ is a black soybean cultivar developed via a cross between ‘Milyang148’ and ‘Daemang’ in 2005. F1 and F2 populations were grown for 2 years, and promising lines were selected using the pedigree method from F3 to F5. The preliminary yield trial (PYT) and advanced yield trials (AYT) were conducted from 2011 to 2012, and regional yield trial (RYT) in 7 regions was conducted from 2013 to 2015. ‘Cheongja4’ is determinate and has purple flowers, a green cotyledon, and black spherical seeds. Flowering date and maturing date were Aug. 5 and Oct. 19, respectively. With respect to its quantitative characteristics, ‘Cheongja4’ has more pods (50) and smaller seed size (30.1g/100-seed weight) than ‘Cheongja3’ (38 and 35.2g/100-seed weight). ‘Cheongja4’ was revealed to be more tolerant to pod shattering than ‘Cheongja3’ in RYT field and indoor test. ‘Cheongja4’ had high levels of resistance to bacterial pustule and soybean mosaic virus in field and inoculation test. Although its seed quality-related characteristics were similar to those of ‘Cheongja3’, it contained more anthocyanin in the seed coat; this is the main functional component of black soybean. The mean yield of ‘Cheongja4’ in RYT was 314kg/10a, 123% of the yield of ‘Cheongja3’. ‘Cheongja4’ is expected to be widely used for variable functional purposes, such as cooking with rice and the production of processed food.
Keywords : Soybean, Cultivar, Cheongja4, Green cotyledon, Black seed coat

September 2018, 50 (3)
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