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Genome-wide identification and expression analysis of the FAR gene family in hexaploid wheat (Triticum aestivum L.)

By Shandang Shi, Guaiqiang Chai, Hui Ren, Wenzhi Nan, Hongqi Wu, Yong Wang, Chunlian Li, Zhonghua Wang

Posted 23 Sep 2018
bioRxiv DOI: 10.1101/424739

Fatty acyl-CoA reductase (FAR) is involved in the biosynthesis of primary alcohols, which are waxy constituents that play an important role in plant stress. Previous studies have shown that primary alcohol is the most important component in the wheat seeding stage and accounts for more than 80% of the total composition. To date, eight FAR genes have been identified in wheat, but there has not been a systematic analysis. In this study, a comprehensive overview of the TaFAR gene family was performed, including analyses of the phylogenetic relationship, the multiple sequence alignment, the conserved motif distribution and the expression pattern. The result showed that a total of 41 wheat FAR genes were identified and designated TaFAR1-A–TaFAR22-D; all FAR genes were divided into six classes according to their phylogenetic relationship, and most of the FAR genes might be related to wheat cuticular wax synthesis. The analysis of the promoter binding site showed that TaFAR genes could be regulated by the MYB transcription factor and could be used as target genes for hormone regulation under adverse conditions, especially during a drought. This study provides a basis for further analyses of the TaFAR gene function and of upstream regulatory genes.

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