Abstract
MADS-box genes form a large family of transcription factors and play important roles in flower development and organ differentiation in plants. In this study, 42 wheat cDNAs encoding putative MADS-box genes were isolated. BLASTX searches and phylogenetic analysis indicated that the cDNAs represented 12 of the 14 MADS-box gene subfamilies. TaAGL14 and TaAGL15 formed a new subfamily along with a rice gene OsMADS32. RT-PCR analysis revealed that these genes had different exprsssion patterns in different organs of different stages. Expression patterns of TaAGL1 and TaAGL29 were also determined using in situ hybridization. TaAGL1 was abundantly expressed in primary root tips and the whole spikelet with more intense labeling at lodicules, paleas and stamens. TaAGL29 was expressed in both the non-reproductive parts (lemma, palea and glumes), and stamens and pistils. Moreover, differential expression patterns of these genes were also observed between wheat hybrid and its parents in leaf, stem and root of jointing stage, some were up-regulated while others were down-regulated in hybrid as compared to its parents. We concluded that multiple MADS-box genes exist in wheat genome and are expressed in tissue-specific patterns, and might play important roles in wheat growth and development.
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This work was financially supported by the State Key Basic Research and Development Plan of China (2001CB1088), National Science Found for Distinguished Young Scholars (39925026) and National Natural Science Foundation of China (30000109, 30270824).
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Zhao, T., Ni, Z., Dai, Y. et al. Characterization and expression of 42 MADS-box genes in wheat (Triticum aestivum L.). Mol Genet Genomics 276, 334–350 (2006). https://doi.org/10.1007/s00438-006-0147-3
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DOI: https://doi.org/10.1007/s00438-006-0147-3