文献类型：期刊文献

英文题名：RNA-Seq Reveals Flavonoid Biosynthesis-Related Genes in Pecan (Carya illinoinensis) Kernels

作者：Zhang, Chengcai[1] Yao, Xiaohua[1] Ren, Huadong[1] Chang, Jun[1] Wang, Kailiang[1]

第一作者：张成才

通信作者：Yao, XH[1]|[a00051e90d3009f1c7c75]姚小华;

机构：[1]Chinese Acad Forestry, Res Inst Subtrop Forestry, Hangzhou 311400, Zhejiang, Peoples R China

年份：2019

卷号：67

期号：1

起止页码：148-158

外文期刊名：JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY

收录：;WOS:【SCI-EXPANDED(收录号:WOS:000455561500017)】；

基金：This study was supported by Fundamental Research Funds of CAF No. CAFYBB2018SY013 and the National Natural Science Foundation of China No. 31800575.

语种：英文

外文关键词：pecan; nut; transcriptome; phenolics; flavonoids; breeding

摘要：Pecan (Carya illinoinensis) is an important tree nut throughout the world. The high concentration of flavonoid in its kernels makes it an excellent food with health benefits. However, the molecular basis of flavonoid biosynthesis in pecan remains unclear, which hinders quality breeding in this plant. Therefore, in order to find the crucial genes involved in flavonoid biosynthesis, the changes in flavonoid profiles and the transcriptomes of pecan kernels at four developmental stages (late water, gel, dough, and mature stages) were analyzed. As a result, the highest levels of total phenolic, condensed tannin, and flavan-3-ols were observed at the "late water stage". Catechin was the most abundant flavan-3-ol at different development stages. In total, 64 773 unigenes were obtained, and 46 924 (72.44%) unigenes were annotated. After differentially expressed gene (DEG) analysis, 12 750 unique DEGs were identified. Flavonoid-related DEGs of 36 structural genes and eight MYBs were obtained. The structural gene set contained three PALS, three CHSs, two CHIs, one F3H, two F3'Hs, two F3'5'Hs, one DFR, one ANS, two LARs, and two ANRs. The expression patterns of most of the structural genes were consistent with the changes in flavonoid profiles during kernel development. We believe that this RNA-Seq data set will provide valuable resources for unraveling the molecular mechanism of flavonoid metabolism in pecan and will significantly promote genetic studies and quality breeding in this plant.