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Background  ZF-HD is a family of genes that play an important role in plant growth, development, some studies have found that after overexpression  AtZHD1  in  Arabidopsis thaliana , florescence advance, the seeds get bigger and the life span of seeds is prolonged, moreover,  ZF-HD  genes are also participate in responding to adversity stress. The whole genome of the  ZF-HD  gene family has been studied in several model plants, such as  Arabidopsis thaliana  and rice. However, there has been little research on the  ZF-HD  genes in Tartary buckwheat ( Fagopyrum tataricum ), which is an important edible and medicinal crop. The recently published whole genome sequence of Tartary buckwheat allows us to study the tissue and expression profiles of the  ZF-HD  gene family in Tartary buckwheat on a genome-wide basis.    Results  In this study, the whole genome and expression profile of the  ZF-HD  gene family were analyzed for the first time in Tartary buckwheat. We identified 20  FtZF-HD  genes and divided them into MIF and ZHD subfamilies according to phylogeny. The ZHD genes were divided into 5 subfamilies. Twenty  FtZF-HD  genes were distributed on 7 chromosomes, and almost all the genes had no introns. We detected seven pairs of chromosomes with fragment repeats, but no tandem repeats were detected. In different tissues and at different fruit development stages, the  FtZF-HD  genes obtained by a real-time quantitative PCR analysis showed obvious expression patterns.    Conclusions  In this study, 20  FtZF-HD  genes were identified in Tartary buckwheat, and the structures, evolution and expression patterns of the proteins were studied. Our findings provide a valuable basis for further analysis of the biological function of the  ZF-HD  gene family. Our study also laid a foundation for the improvement of Tartary buckwheat crops.    Electronic supplementary material  The online version of this article (10.1186/s12870-019-1834-7) contains supplementary material, which is available to authorized users.

Genome-wide investigation of the ZF-HD gene family in Tartary buckwheat (Fagopyrum tataricum)