拟环纹豹蛛转录组数据SSR序列特征分析
2021-09-13刘靖魏俞虹肖榕
刘靖 魏俞虹 肖榕



摘 要:拟环纹豹蛛Pardosa pseudoannulata是稻田害虫重要的自然天敌,在绿色防控中有重要作用。本研究基于拟环纹豹蛛转录组数据,使用微卫星鉴定工具软件(MISA) 挖掘和分析其简单序列重复(SSR)位点。结果表明:拟环纹豹蛛转录组Unigene序列中共检测到6474个SSR位点,平均长度为12.36 bp,分布于4411条Unigene上。单核苷酸重复类型为拟环纹豹蛛转录组SSR位点的主导基序类型,共5025个,占总SSR位点的77.62%;在拟环纹豹蛛转录组序列识别的6474个SSR中共发现了53种重复基元,从单核苷酸到五核苷酸重复基元分别有2种、6种、27种、15种和3种,其中(A/T)基元类型占明显优势,占总SSR的74.44%。拟环纹豹蛛转录组SSR位点丰富,有较高的多态性潜能,可作为开发SSR标记的有效来源,为拟环纹豹蛛的遗传多样性分析、功能基因的开发利用等方面的研究奠定基础。
关键词:拟环纹豹蛛;转录组;SSR;重复基元
中图分类号:Q346+.5;Q959.1
文献标识码:A
文章编号:1008-0457(2021)04-0031-07
国际DOI编码:10.15958/j.cnki.sdnyswxb.2021.04.005
Abstract:The wolf spider Pardosa pseudoannulata is an important biological control agent of rice pests and plays an important role in green prevention and control.In this study,based on the transcriptome data of P.pseudoannulata,we used MISA (microsatellite identification tool) to analyze its SSR (simple sequence repeat) loci.The results showed that a total of 6474 SSR loci were detected in the Unigene sequence of the transcriptome data,with an average length of 12.36 bp,distributed on 4411 Unigenes.The Mono-nucleotide repeat type were the dominanttype,its number was 5025,accounting for 77.62% of the total SSR loci.The 6474 SSR lociwere identified 53 repetitive motifs,there were 2,6,27,15 and 3 repetitive motifs from Mono-nucleotide to Hexa-nucleotide.(A/T)was dominant repetitive motif,accounting for 74.44% of the total SSR.The SSR loci of transcriptome in P.pseudoannulata were rich and high polymorphism potential. Our results can be used as an effective source for the development of SSR marker and provide foundation for research of genetic diversity and development functional genes of P.pseudoannulata.
Keywords:Pardosa pseudoannulata;transcriptome;SSR;repeat motif
擬环纹豹蛛Pardosa pseudoannulata属于蛛形纲Arachnida蜘蛛目Araneae狼蛛科Lycosidae豹蛛属Pardosa,在我国分布较广,是稻田生态系统中优势种蜘蛛,尤其在我国南方的广东[1]、湖南[2]、湖北[3]、云南[4]、贵州[5]等地区常年可见。拟环纹豹蛛属于中型蜘蛛,成蛛体长可达到13 mm,雌雄蛛均可多次交配,雌蛛每次平均产卵156粒,孵化的幼蛛群集在雌蛛背面3~7 d后才离开,幼蛛期47~158 d,成蛛期121~236 d,雌蛛较雄蛛长21~62 d[2,6-7]。拟环纹豹蛛是稻田害虫的重要捕食性天敌,其空间生态位宽[6,8],能够在水面、稻株上、地面上等多种环境捕食褐飞虱Nilaparvata lugens、白背飞虱Sogatella furcifera、稻纵卷叶螟Cnaphalocrocis medinalis、黑尾叶蝉Nephotettix bipunctatus等害虫。在稻田中捕食飞虱和叶蝉,90%是狼蛛科蜘蛛的功劳[9-13]。……
