Abstract
Soybean genome sequences were blasted with Arabidopsis thaliana regulatory genes involved in photoperiod-dependent flowering. This approach enabled the identification of 118 genes involved in the flowering pathway. Two genome sequences of cultivated (Williams 82) and wild (IT182932) soybeans were employed to survey functional DNA variations in the flowering-related homologs. Forty genes exhibiting nonsynonymous substitutions between G. max and G. soja were catalogued. In addition, 22 genes were found to co-localize with QTLs for six traits including flowering time, first flower, pod maturity, beginning of pod, reproductive period, and seed filling period. Among the genes overlapping the QTL regions, two LHY/CCA1 genes, GI and SFR6 contained amino acid changes. The recently duplicated sequence regions of the soybean genome were used as additional criteria for the speculation of the putative function of the homologs. Two duplicated regions showed redundancy of both flowering-related genes and QTLs. ID 12398025, which contains the homeologous regions between chr 7 and chr 16, was redundant for the LHY/CCA1 and SPA1 homologs and the QTLs. Retaining of the CRY1 gene and the pod maturity QTLs were observed in the duplicated region of ID 23546507 on chr 4 and chr 6. Functional DNA variation of the LHY/CCA1 gene (Glyma07g05410) was present in a counterpart of the duplicated region on chr 7, while the gene (Glyma16g01980) present in the other portion of the duplicated region on chr 16 did not show a functional sequence change. The gene list catalogued in this study provides primary insight for understanding the regulation of flowering time and maturity in soybean.
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This research was supported by a grant from the Next Generation BioGreen 21 Program (Code No. PJ00811701), Rural Development Administration, the Republic of Korea.
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[Kim MY, Shin JH, Kang YJ, Shim SR and Lee S-H 2012 Divergence of flowering genes in soybean. J. Biosci. 37 1–14] DOI 10.1007/s12038-012-9252-0
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Kim, M.Y., Shin, J.H., Kang, Y.J. et al. Divergence of flowering genes in soybean. J Biosci 37, 857–870 (2012). https://doi.org/10.1007/s12038-012-9252-0
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DOI: https://doi.org/10.1007/s12038-012-9252-0