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Acta Horticulturae Sinica ›› 2023, Vol. 50 ›› Issue (11): 2350-2364.doi: 10.16420/j.issn.0513-353x.2023-0355

• Genetic & Breeding·Germplasm Resources·Molecular Biology • Previous Articles     Next Articles

Analysis of Canarium album Transcriptome SSR Information and Molecular Marker Development and Application

XIE Qian1, ZHANG Shiyan1, JIANG Lai1, DING Mingyue1, LIU Lingling1, WU Rujian2, CHEN Qingxi1,*()   

  1. 1 College of Horticulture,Fujian Agricultural and Forest University,Fuzhou 350002,China
    2 Fruit Research Institute,Fujian Academy of Agricultural Sciences,Fuzhou 350013,China
  • Received:2023-05-22 Revised:2023-07-02 Online:2023-11-25 Published:2023-11-28
  • Contact: CHEN Qingxi

Abstract:

The mature fruits of different varieties(lines)of Canarium album L. were selected for transcriptome sequencing,and 296 314 sequences were obtained. MISA software was used to analyze SSR loci,and 86 084 SSR loci were obtained,distributed in 70 686 sequences. The frequency of SSR in the detected sequences was 23.86%,of which 54 735 sequences contained two or more SSR loci,accounting for 68.4%. The SSR sequences in the Chinese olive transcriptome were mainly composed of compound nucleotide,single nucleotide and dinucleotide repeats,accounting for 88.88% of the total SSRs. The dominant motifs in mononucleotide and dinucleotide repeat types were A/T and AG/CT/TC/GA,respectively. The effectiveness and polymorphism of 99 pairs of SSR primers randomly selected from six different Chinese olive lines(species)were screened. Finally,53 effective SSR molecular markers and 12 polymorphic SSR molecular markers were developed. The polymorphism evaluation and population structure analysis of 59 Chinese olive germplasm were carried out by using 12 polymorphic EST-SSR markers. A total of 48 polymorphic loci were detected. The average Shannon diversity index was 0.876,and the average polymorphic information content was 0.426. The population structure of 59 Chinese olive germplasms was analyzed by three methods of mixed group model grouping,UPGMA clustering and PCA. The results of mixed group model analysis were crossed with those of UPGMA clustering and principal component analysis,but the number of groups was different. The mixed group model was divided into three groups. UPGMA cluster analysis was divided into two populations at the genetic similarity coefficient of 0.68,which was the same as the PCA method. The results of the study concluded that the 12 pairs of SSR markers developed were genetically diverse and valid,and provided a reliable basic tool for Chinese olive germplasm resource identification.

Key words: Canarium album, transcriptome, SSR, polymorphic primer, genetic diversity, population structure