Genome sequence and transcriptome of Sorbus pohuashanensis provide insights into population evolution and leaf sunburn response

文献类型： 外文期刊

第一作者： Zhao, Dongxue

作者： Zhao, Dongxue;Zhang, Yan;Zheng, Jian;Lu, Yizeng;Fan, Liqiang;Zhang, Zhibin;Chai, Mao

作者机构：

关键词： Sorbus pohuashanensis; Genome assembly; Population evolution; Sunburn

期刊名称：JOURNAL OF GENETICS AND GENOMICS （ 影响因子：5.723； 五年影响因子：5.755 ）

ISSN： 1673-8527

年卷期： 2022 年 49 卷 6 期

页码：

收录情况： SCI

摘要： Sorbus pohuashanensis (Hance) Hedl. is a potential horticulture and medicinal plant, but its genomic and genetic backgrounds remain unknown. Here, we sequence and assemble the S. pohuashanensis reference genome using PacBio long reads. Based on the new reference genome, we resequence a core collection of 22 Sorbus spp. samples, which are divided into 2 groups (G1 and G2) based on phylogenetic and PCA analyses. These phylogenetic clusters are highly consistent with their classification based on leaf shape. Natural hybridization between the G1 and G2 groups is evidenced by a sample (R21) with a highly heterozygous genotype. Nucleotide diversity (pi) analysis shows that G1 has a higher diversity than G2 and that G2 originated from G1. During the evolution process, the gene families involved in photosynthesis pathways expanded and the gene families involved in energy consumption contracted. RNA-seq data suggests that flavonoid biosynthesis and heat-shock protein (HSP)-heat-shock factor (HSF) pathways play important roles in protection against sunburn. This study provides new insights into the evolution of Sorbus spp. genomes. In addition, the genomic resources, and the identified genetic variations, especially those related to stress resistance, will help future efforts to produce and breed Sorbus spp. Copyright (C) 2022, Institute of Genetics and Developmental Biology, Chinese Academy of Sciences, and Genetics Society of China. Published by Elsevier Limited and Science Press. All rights reserved.

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