JOURNAL ARTICLE
RESEARCH SUPPORT, NON-U.S. GOV'T
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Genome-wide identification and analysis of the MADS-box gene family in sesame.

Gene 2015 September 11
MADS-box genes encode transcription factors that play crucial roles in plant growth and development. Sesame (Sesamum indicum L.) is an oil crop that contributes to the daily oil and protein requirements of almost half of the world's population; therefore, a genome-wide analysis of the MADS-box gene family is needed. Fifty-seven MADS-box genes were identified from 14 linkage groups of the sesame genome. Analysis of phylogenetic relationships with Arabidopsis thaliana, Utricularia gibba and Solanum lycopersicum MADS-box genes was performed. Sesame MADS-box genes were clustered into four groups: 28 MIKC(c)-type, 5 MIKC(⁎)-type, 14 Mα-type and 10 Mγ-type. Gene structure analysis revealed from 1 to 22 exons of sesame MADS-box genes. The number of exons in type II MADS-box genes greatly exceeded the number in type I genes. Motif distribution analysis of sesame MADS-box genes also indicated that type II MADS-box genes contained more motifs than type I genes. These results suggested that type II sesame MADS-box genes had more complex structures. By analyzing expression profiles of MADS-box genes in seven sesame transcriptomes, we determined that MIKC(C)-type MADS-box genes played significant roles in sesame flower and seed development. Although most MADS-box genes in the same clade showed similar expression features, some gene functions were diversified from the orthologous Arabidopsis genes. This research will contribute to uncovering the role of MADS-box genes in sesame development.

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