Several environmental and genetic factors affect the isoflavone and anthocyanin contents in soybeans. This study aimed to assess the influences of cotyledon color and harvest period on the contents of five major isoflavones and three major anthocyanins in 323 black soybean landraces grown in Korea. In all the soybeans, malonylgenistin, malonyldaidzin and cyanidin-3-O-glucoside were the foremost components. The total isoflavone (TIC) and total anthocyanin (TAC) contents were in the ranges of 491.29-1998.39 µg/g and 452.60-2789.37 mg/100 g on dry weight basis, respectively. Both the average TIC and TAC were higher in green cotyledon soybeans (1493.93 µg/g and 1656.05 mg/100 g, respectively) than in yellow cotyledon soybeans (1423.09 µg/g and 1489.30 mg/100 g, respectively). With respect to the harvest period, the average TIC was in the order of Late-October (1517.31 µg/g) > Mid-October (1454.54 µg/g) > Early-October (1340.95 mg/g). Moreover, the average TAC decreased in the order of Late-October (1765.76 mg/100 g) > Mid-October (1503.93 mg/100 g) > Early-October (1350.91 mg/100 g). In general, cotyledon color appeared to cause a significant variation on TAC (P < 0.05) but not on TIC, whereas the harvest period appeared to cause significant variations on both the TAC and TIC. Among the 323 landraces, 20 were identified to contain high TIC (> 1800 mg/g) and TAC (> 2000 mg/100 g) in their seeds and hence, could be considered as important sources of dietary isoflavones and anthocyanins. Besides, they possibly provide a wide spectrum of options if considered during the development of improved soybean genotypes.

Citations

Citations to this article as recorded by  

• RDA-Genebank and Digital Phenotyping for Next-Generation Research on Plant Genetic Resources
  Seong-Hoon Kim, Parthiban Subramanian, Young-Wang Na, Bum-Soo Hahn, Yoonha Kim
  Plants.2023; 12(15): 2825.     CrossRef
• Improvement of Selection Efficiency of Haploid Maize Seeds Using Fluorescence Imaging
  Younguk Kim, Jeong Heon Han, Jaeyoung Kim, Yeongtae Kim, Nyunhee Kim, Chaewon Lee, Seoyeoun Lee, Song Lim Kim, Moon Jong Kim, Si Hwan Ryu, Hongro Lee, Hyeonso Ji, Kyung-Hwan Kim, Jeongho Baek
  Korean Journal of Breeding Science.2022; 54(4): 276.     CrossRef
• Origin and seed coat color differently affect the concentrations of metabolites and antioxidant activities in soybean (Glycine max (L.) Merrill) seeds
  Kebede Taye Desta, On Sook Hur, Sukyeung Lee, Hyemyeong Yoon, Myoung-Jae Shin, Jungyoon Yi, Yoonjung Lee, Na Young Ro, Xiaohan Wang, Yu-Mi Choi
  Food Chemistry.2022; 381: 132249.     CrossRef
• A Correlation Study on In Vitro Physiological Activities of Soybean Cultivars, 19 Individual Isoflavone Derivatives, and Genetic Characteristics
  Han-Na Chu, Su-Ji Lee, Xiaohan Wang, Sang-Hoon Lee, Hye-Myeong Yoon, Yu-Jin Hwang, Eun-Suk Jung, Yongseok Kwon, Chi-Do Wee, Kyeong-A Jang, Haeng-Ran Kim
  Antioxidants.2021; 10(12): 2027.     CrossRef