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  • Title: Genome-wide survey and expression analysis of the MADS-box gene family in soybean.
    Author: Shu Y, Yu D, Wang D, Guo D, Guo C.
    Journal: Mol Biol Rep; 2013 Jun; 40(6):3901-11. PubMed ID: 23559340.
    Abstract:
    MADS-box genes encode important transcription factors in plants that are involved in many processes during plant growth and development. An investigation of the soybean genome revealed 106 putative MADS-box genes. These genes were classified into two classes, type I and type II, based on phylogenetic analysis. The soybean type II group has 72 members, which is higher than that of Arabidopsis, indicating that soybean type II genes have undergone a higher rate of duplication and/or a lower rate of gene loss after duplication. Soybean MADS-box genes are present on all chromosomes. Like Arabidopsis and rice MADS-box genes, soybean MADS-box genes expanded through tandem gene duplication and segmental duplication events. There are many duplicate genes distributed across the soybean genome, with two genomic regions, i.e., MADS-box gene hotspots, where MADS-box genes with high degrees of similarity are clustered. Analysis of high-throughput sequencing data from soybean at different developmental stages and in different tissues revealed that MADS-box genes are expressed in embryos of various stages and in floral buds. This expression pattern suggests that soybean MADS-box genes play an important role in soybean growth and floral development.
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