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Comparative Transcriptome Analysis Combining SMRT- and Illumina-Based RNA-Seq Identifies Potential Candidate Genes Involved in Betalain Biosynthesis in Pitaya Fruit

文献类型： 外文期刊

作者： Wu, Yawei 1 ; Xu, Juan 3 ; Han, Xiumei 2 ; Qiao, Guang 1 ; Yang, Kun 1 ; Wen, Zhuang 1 ; Wen, Xiaopeng 1 ;

作者机构： 1.Guizhou Univ, Key Lab Plant Resource Conservat & Germplasm Inno, Minist Educ, Inst Agrobioengn,Coll Life Sci, Guiyang 550025, Guizhou, Peoples R China

2.Guizhou Acad Agr Sci, Inst Pomol Sci, Guiyang 550006, Guizhou, Peoples R China

3.Huazhong Agr Univ, Minist Educ, Key Lab Hort Plant Biol, Wuhan 430070, Hubei, Peoples R China

关键词： pitaya; SMRT; betalain; different expressed genes; qRT-PCR

期刊名称：INTERNATIONAL JOURNAL OF MOLECULAR SCIENCES （ 影响因子：5.923； 五年影响因子：6.132 ）

ISSN：

年卷期： 2020 年 21 卷 9 期

页码：

收录情况： SCI

摘要： To gain more valuable genomic information about betalain biosynthesis, the full-length transcriptome of pitaya pulp from 'Zihonglong' (red pulp) and 'Jinghonglong' (white pulp) in four fruit developmental stages was analyzed using Single-Molecule Real-Time (SMRT) sequencing corrected by Illumina RNA-sequence (Illumina RNA-Seq). A total of 65,317 and 91,638 genes were identified in 'Zihonglong' and 'Jinghonglong', respectively. A total of 11,377 and 15,551 genes with more than two isoforms were investigated from 'Zihonglong' and 'Jinghonglong', respectively. In total, 156,955 genes were acquired after elimination of redundancy, of which, 120,604 genes (79.63%) were annotated, and 30,875 (20.37%) sequences without hits to reference database were probably novel genes in pitaya. A total of 31,169 and 53,024 simple sequence repeats (SSRs) were uncovered from the genes of 'Zihonglong' and 'Jinghonglong', and 11,650 long non-coding RNAs (lncRNAs) in 'Zihonglong' and 11,113 lncRNAs in 'Jinghonglong' were obtained herein. qRT-PCR was conducted on ten candidate genes, the expression level of six novel genes were consistent with the Fragments Per Kilobase of transcript per Million mapped reads (FPKM) values. In conclusion, we firstly undertook SMRT sequencing of the full-length transcriptome of pitaya, and the valuable resource that was acquired through this sequencing facilitated the identification of additional betalain-related genes. Notably, a list of novel putative genes related to the synthesis of betalain in pitaya fruits was assembled. This may provide new insights into betalain synthesis in pitaya.

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