生物技术进展 ›› 2024, Vol. 14 ›› Issue (6): 892-901.DOI: 10.19586/j.2095-2341.2024.0120

• 食药用菌生物技术专题 • 上一篇    下一篇

黑木耳丰度SNP标记开发及应用

贾定洪1(), 刘询1, 王波1(), 王晓巍2,3, 李通2, 黄礼璟4   

  1. 1.四川省农业科学院四川省食用菌研究所,成都 610066
    2.甘肃省农业科学院,兰州 730070
    3.天水红崖河菌业种植有限公司,甘肃 天水 741001
    4.鲁东大学农学院,山东 烟台 264001
  • 收稿日期:2024-07-02 接受日期:2024-08-14 出版日期:2024-11-25 发布日期:2024-12-27
  • 通讯作者: 贾定洪,王波
  • 作者简介:贾定洪E-mail: jdhdragon@163.com
    贾定洪E-mail: jdhdragon@163.com
  • 基金资助:
    国家重点研发计划项目(2022YFD1602109)

Development and Application of Abundance SNP Markers for Auricularia heimuer

Dinghong JIA1(), Xun LIU1, Bo WANG1(), Xiaowei WANG2,3, Tong LI2, Lijing HUANG4   

  1. 1.Sichuan Institute of Edible Fungi,Sichuan Academy of Agricultural Sciences,Chengdu 610066,China
    2.Gansu Academy of Agricultural Sciences,Lanzhou 730070,China
    3.Tianshui Hongyahe Mushroom Planting Co. ,Ltd. ,Gansu Tianshui 741001,China
    4.School of Agriculture,Ludong University,Shandong Yantai 264001,China
  • Received:2024-07-02 Accepted:2024-08-14 Online:2024-11-25 Published:2024-12-27
  • Contact: Dinghong JIA,Bo WANG

摘要:

以黑木耳(Auricularia heimuer Dai13782)的基因组作为参考框架,利用NCBI数据库中收录的皱木耳SS5、黑木耳B14-8、毛木耳CCMJ2827及毛木耳ACW001等菌株的基因组为测试数据,通过一系列生物信息学工具(如Bwa、Samtools、Bcftools)分析了黑木耳及近缘种共5个菌株之间的基因组变异情况。利用Tassel 5软件,构建了包含5个菌株在内的亲缘关系矩阵,利用R语言中的Pheatmap包,对这一矩阵进行了可视化处理,直观地展示了这5个菌株之间的亲缘关系。采用VCFtools-0.1.16软件,通过设定300 bp的滑动窗口,筛选出其中单核苷酸多态性(single nucleotide polymorphism, SNP)数量等于或大于50的丰度SNP(abundance SNP, aSNP)区域。利用Primer 3软件,针对这些aSNP区域设计了47 407对引物。经过e-PCR的严格筛选,发现1 020对引物符合实验设定,涉及8个aSNP区域,每个区域保留1对特异引物,分布在参考基因组的6个重叠群区域。以常用的ITS和LSU作为参考标记,以aSNP标记验证分析13个黑木耳菌株的遗传亲缘关系。结果显示,aSNP标记揭示的系统发育关系大体上与ITS、LSU标记结果一致,甚至能更细致地区分亲缘关系很近的黑木耳菌株。总体上反映出黑木耳菌株与毛木耳亲缘关系相对较近,与皱木耳关系最远,该结果与基于全基因组SNP揭示的亲缘关系结果基本一致,侧面证实了基于aSNP序列分析结果的可靠性。实验开发的aSNP标记序列区间含有丰富的变异位点,有望作为传统ITS、Rpb2、Ef1α等靶标分析序列的有益补充,为黑木耳等种质资源的系统发育及遗传鉴定提供助力。

关键词: 黑木耳, aSNP, VCFtools, 种质资源

Abstract:

The genome of Auricularia heimuer Dai13782 was used as the reference genome, while the genomes of A. subglabra SS5, A. auricula-judae B14-8, A. cornea CCMJ2827, and A. cornea ACW001 from the NCBI database were utilized as the test data. The genome variation data of A. heimuer and its related species were analyzed using Bwa, Samtools and Bcftools. The genetic relationship matrix was obtained using Tassel 5 software, and the genetic relationships among five strains were visualized using the pheatmap package. VCFtools-0.1.16 software was used to filter and extract abundant single nucleotide polymorphisms (aSNPs), specifically aSNP regions with a SNP count equal to or greater than 50 in a 300 bp sliding window. Subsequently, 47 407 pairs of primers were designed using Primer 3 software. E-PCR results showed that 1 020 pairs of primers met the experimental design, involving 8 aSNP regions. Each region retained 1 pair of specific primers, which were distributed in 6 contig regions of the reference genome. In this experiment, the commonly used ITS and LSU were employed as reference markers, and the genetic relationship of 13 A. heimuer strains was analyzed using aSNP markers. The results showed that the phylogenetic relationships revealed by aSNP markers were generally consistent with the results of ITS and LSU markers, and even better able to distinguish closely related A. heimuer strains. On the whole, it reflects that A. heimuer strains are relatively close to A. corne, and farthest from A. subglabra. This result is consistent with the genetic relationship revealed by the whole-genome SNP analysis, which also confirms the reliability of the results based on aSNP sequence analysis. The aSNP marker sequence interval developed in the experiment contains numerous mutation sites, which is expected to serve as a beneficial supplement to traditional target analysis sequences such as ITS, Rpb2, and Ef1α, providing assistance for the systematic development and genetic identification of A. heimuer and other germplasm resources.

Key words: Auricularia heimuer, aSNP, VCFtools, germplasm resource

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