title: Genome-wide survey and expression analysis of the MADS-box gene family in soybean.
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.
authors.affiliation: Key Laboratory of Molecular Cytogenetics and Genetic Breeding of Heilongjiang Province, College of Life Science and Technology, Harbin Normal University, Harbin, 150025, Heilongjiang, People's Republic of China.
authors.forename: Yongjun
authors.initials: Y
authors.lastname: Shu
authors.forename: Diansi
authors.initials: D
authors.lastname: Yu
authors.forename: Dan
authors.initials: D
authors.lastname: Wang
authors.forename: Donglin
authors.initials: D
authors.lastname: Guo
authors.forename: Changhong
authors.initials: C
authors.lastname: Guo
mesh_terms: D020816:Amino Acid Motifs; D017360:Arabidopsis / Q000235:genetics; D032461:Chromosomes, Plant / Q000235:genetics; D017124:Conserved Sequence / Q000235:genetics; D020440:Gene Duplication; D020869:Gene Expression Profiling; D018506:Gene Expression Regulation, Plant; D017343:Genes, Plant / Q000235:genetics; D018745:Genome, Plant / Q000235:genetics*; D026161:MADS Domain Proteins / Q000737:chemistry / Q000235:genetics* / Q000378:metabolism; D010802:Phylogeny; D013025:Glycine max / Q000235:genetics*
chemical_list: D026161:MADS Domain Proteins
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