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.

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Buckwheat sprouts are used as a functional food in several countries owing to their soft and slightly crispy texture and attractive fragrance. They possess excellent anti-oxidant activity and are rich in amino acids, minerals, and flavonoids; however, sprout growth and flavonoid content may vary among buckwheat germplasms. The present study was performed to evaluate 87 common and 13 tartary buckwheat germplasms for sprout growth traits and rutin and quercetin content. We found that the common type buckwheat sprouts had considerably higher leaf length and width, fresh shoot weight, and extract weight than those of tartary buckwheat sprouts, but the rutin and quercetin content was significantly higher in tartary buckwheat sprouts. The rutin content ranged from 323.7 to 750.6 mg/ 100 g DW in common buckwheat sprouts and 2220 to 3185 mg/100 g DW in tartary buckwheat sprouts. Similarly, the quercetin content ranged from 0.27 to 1.82 and 4.76 to 30.41 mg/100 g DW in common and tartary buckwheat sprouts, respectively. Additionally, there was no significant correlation between the growth traits and rutin content in common buckwheat sprouts, whereas, the leaf length of tartary buckwheat sprouts showed a significant positive correlation with the rutin content. This information can be used by plant breeders and plant geneticists to study the genetic and genomic approaches for buckwheat breeding program.

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Low temperature germinability (LTG) is an important trait for stand establishment in the direct-seeding method of rice cultivation. In temperate growing regions, water temperature during sowing season is frequently below 15°C resulting in poor crop establishment. The
objective
of this study was to select enhanced rice germplasm for low temperature germinability. Association of the phenotype for LTG with the genotype for qLTG3-1, a major QTL for LTG, in japonica rice accessions (n = 180) from East Asia was conducted. A highly significant association was observed between qLTG3-1 alleles and tolerant (χ² = 56.617, P = 5.08E-13) or sensitive (χ² = 32.844, P = 7.38E-08) accessions. Association of genotype and phenotype suggested the germplasm panel used in this study were closely associated with cold environment at the germination stage. Genotypic data from 32 SNP markers derived from previously reported LTG QTLs showed a mean polymorphism information content (PIC) of 0.248 and an average gene diversity of 0.307. A neighbor-joining tree clustered 23 tolerant accessions into one group and the genotypic data for four of the markers revealed that all of these accessions had the alternative allele for the qLTG3-1 and qLTG2-6 markers and the reference allele at the qLTG11-1 marker. Sensitive accessions clustered into one group and harbored the reference allele at the qLTG4-3 marker. Finally, ten accessions were selected after phenotypic and genotypic evaluation for LTG and these temperate japonica cultivars or breeding lines may contribute to the breeding of rice varieties for direct-seeding systems.

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• Morphological and molecular evaluation for germinability in rice varieties under low-temperature and anaerobic conditions
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