小麥miR166基因家族鑒定及表達分析
首發時間:2023-04-07
摘要:miR166在植物生長發育和對環境脅迫的反應中具有重要作用。利用PmiREN、EnsemblPlants數據庫、MEGA-X、DNAMAN軟件以及RNAfold web server、WebLogo和psRNATarget在線網站對小麥miR166(Tae-miR166)基因家族的進化特性和表達模式進行分析,對Tae-miR166基因家族進行研究。在PmiREN數據庫中搜索到19個Tae-miR166基因家族成員,染色體定位發現Tae-miR166成員定位于14條染色體上。序列比對發現Tae-miR166的成熟體序列高度保守;進化分析結果表明,Tae-miR166基因家族成員分別處于4個進化分支。靶基因預測結果表明Tae-miR166的靶基因包括Ⅲ類同源異型結構域亮氨酸拉鏈蛋白、β半乳糖苷酶和鈣依賴性蛋白激酶等。轉錄組數據分析表明Tae-miR166家族19個成員在小麥6個組織中都有表達,在籽粒和穗中表達量最高。熒光定量PCR結果表明,Tae-miR166家族成員在鎘、干旱和低溫脅迫處理后的表達模式存在差異,說明Tae-miR166家族基因在植株抵御非生物脅迫時發揮著重要作用。本研究為進一步闡明Tae-miR166家族基因的功能提供了理論依據。
關鍵詞: 小麥 Tae-miR166 進化規律 靶基因
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Genome-wide identification and expression analysis of miR166 gene family in Triticum aestivum L.
Abstract:miR166 has an essential role in plant growth and development and in response to environmental stresses. The evolutionary characteristics and expression patterns of miR166 gene family in wheat (Tae-miR166) were analyzed by PmiREN, Ensembl Plants database, MEGA-X, DNAMAN software, RNAfold web server, WebLogo and psRNATarget online websites. Nineteen members of the Tae-miR166 gene family were searched in the PmiREN database, and chromosome localization revealed that Tae-miR166 were localized on 14 chromosomes. Sequence alignment revealed that the mature sequences of Tae-miR166 were highly conserved; evolutionary analysis showed that the Tae-miR166 gene family members were in four evolutionary branches, respectively. The target gene prediction results showed that the target genes of Tae-miR166 gene family included class III homologous heterotypic structural domain leucine zipper protein, beta-galactosidase and calcium-dependent protein kinase. RNA-seq data analysis showed that 19 members of the Tae-miR166 family were expressed in 6 tissues of wheat, with the highest expression in grains and ears. The results of RT-qPCR showed that the expression patterns of Tae-miR166 family members were different after cadmium, drought and low temperature stress treatment, indicating that Tae-miR166 family genes played an important role in plant resistance to abiotic stress.This study provided a theoretical basis for further elucidating the function of miR166 family genes in wheat.
Keywords: wheat Tae-miR166 evolutionary law target gene
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