Research Article

Identification and Bioinformatics Analysis of KNOX Gene Family in Wheat (Triticum aestivum L.)  

Ningning Song , Huihui Liang , Yiwei An , Shenglong Bai , Feifei Ma , Zhen Zhang , Hao Li , Yun Zhou , Guanghui Guo , Chunpeng Song
Henan University School of Life Sciences, State Key Laboratory of Crop Stress Adaptation and Improvement, KaiFeng, 475004, P.R. China
Author    Correspondence author
Molecular Plant Breeding, 2021, Vol. 12, No. 19   doi: 10.5376/mpb.2021.12.0019
Received: 02 Jun., 2021    Accepted: 13 Jun., 2021    Published: 20 Jun., 2021
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This article was first published in Molecular Plant Breeding in Chinese, and here was authorized to translate and publish the paper in English under the terms of Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
Preferred citation for this article:

Song N.N., Liang HH., An Y.W., Bai S.L., Ma F.F., Zhang Z., Li H., Zhou Y., Guo G.H., and Song C.P., 2021, Identification and bioinformatics analysis of KNOX gene family in wheat (Triticum aestivum L.), Molecular Plant Breeding, 12(19): 1-11 (doi: 10.5376/mpb.2021.12.0019)


KNOTTED-like homeodomain (KNOX) gene family is a transcription factor encoding homeobox protein, which plays an important role in plant growth and morphogenesis. However, little information is available on the KNOX gene family in wheat (Triticum aestivum L.). In this study, 36 KNOX genes with KNOX1 or KNOX2 domain distributed on 18 chromosomes were identified from wheat genome using bioinformatics methods. The phylogenetic evolution, gene structure, protein domains, cis-acting elements and gene expression patterns were analyzed in the present study. Based on the phylogenetic tree, the 36 TaKNOX genes were divided into two major subclasses, Class I and Class II, and the two subclasses were further divided into five evolutionary branches. Most TaKNOX genes contain four typical conserved protein domains: KNOX1, KNOX2, ELK and HOX. Some cis-acting elements are associated with hormonal, plant development and stress in TaKNOX promoters. The analysis result of transcriptome data from wheat different tissue showed that Class I KNOX genes had obvious tissue specificity, while Class II KNOX genes expressed widely in different wheat tissues. The study results provide important information for future analysis of the regulation and functions of the TaKNOX gene family.

Wheat; KNOX gene family; Gene structure; Gene expression
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. Ningning Song
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. Guanghui Guo
. Chunpeng Song
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