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Jiajia Wang,Qianqian Ge,Jitao Li,Haiyu Gao,Jian Li,Fazhen Zhao 한국유전학회 2018 Genes & Genomics Vol.40 No.2
The ridgetail white prawn Exopalaemon carinicauda is one of the major commercial mariculture species in eastern China. However, only limited molecular markers are currently available due to the lack of genome information, which hinders its genetic and breeding studies. In this study, we identified new simple sequence repeats from transcriptome sequences by Illumina Hiseq 2500 platform. A total of 14273 SSR loci were identified from 130,082 assembled transcripts, with 6590 pairs of PCR primers designed. A total of 12,155 sequences containing SSR were predicted; and 2764 (22.74%) transcripts had significant matches to the NCBI non redundant protein (Nr) database. 11,563 transcripts were assigned into gene ontology (GO) categories. A set of 200 primers selected randomly were synthesized, of which 152 (76.0%) were successfully amplified. Further test with 60 pairs of polymorphic SSR primers to evaluate the genetic diversity of 30 wild populations and 43 loci were polymorphic, which had a polymorphic information content between 0.204 and 0.911. The results enriched genomic resources of E. carinicauda and provided powerful information for future conservation and breeding researches.
Phylogenetic relationships of ascomycetes and basidiomycetes based on comparative genomics analysis
Xunbiao Liu,Qianqian Zhang,Xinyao Xia,Xiuyuan Liu,Lei Ge,Long Yang 한국유전학회 2017 Genes & Genomics Vol.39 No.12
The relationship between ascomycetes and basidiomycetes, the two main phyla of non-flagellated fungi, has rarely been investigated. In this study, we performed a comparative genomics analysis of genome sequences of 55 ascomycetes and 26 basidiomycetes species and detected 81 universal markers, 875 homologous genes and a conserved contig in the glucose-regulated protein gene. In dendrograms based on simple sequence repeat markers and homologous genes, ascomycetes and basidiomycetes formed distinct clusters, with each set of taxa having a high coefficient of relatedness. Ascomycetes and basidiomycetes also constituted distinct groups in a phylogenetic tree based on a conserved contig in the glucoseregulated protein gene. These results provide evidence that basidiomycetes may be derived from ascomycetes but are definitely genetically differentiated at the genomic level. The phylogenetic relationships of ascomycetes and basidiomycetes uncovered in this study provide new insights for future research related to fungal classification and evolution.