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植物研究 ›› 2014, Vol. 34 ›› Issue (3): 393-402.doi: 10.7525/j.issn.1673-5102.2014.03.017

• 论文 • 上一篇    下一篇

水曲柳EST-SSRs位点信息分析

孙宏冉1;齐凤慧1;詹亚光1*;叶鹏2   

  1. 1.东北林业大学生命科学院,哈尔滨 150040;2.东北林业大学林学院,哈尔滨 150040
  • 收稿日期:1900-01-01 修回日期:1900-01-01 出版日期:2014-05-20 发布日期:2014-05-20
  • 通讯作者: 詹亚光
  • 基金资助:
     

EST-SSRs Locus Information Analysis from Fraxinus mandshurica Rupr.

SUN Hong-Ran;QI Feng-Hui;ZHAN Ya-Guang*;YE Peng   

  1. 1.School of Life Sciences,Northeast Forestry University,Harbin 150040;2.School of Forestry,Northeast Forestry University,Harbin 150040
  • Received:1900-01-01 Revised:1900-01-01 Online:2014-05-20 Published:2014-05-20
  • Contact: ZHAN Ya-Guang
  • Supported by:
     

摘要: 为使EST-SSRs分子标记技术在水曲柳辅助育种、基因定位、雌雄鉴定等研究中应用,本文对NCBI数据库中的12 100条水曲柳ESTs进行了分析,序列拼接得到全长为3.02×106 bp的非冗余的5 423个ESTs聚类,利用在线软件SSRIT进行SSRs位点搜索,共检索出9 489个SSRs位点。EST-SSRs的长度从6~46 bp之间变化。二核苷酸重复在水曲柳中占主导地位(6 914个),占总SSRs的72.86%,其次是三核苷酸(24.96%)和四核苷酸(1.37%)。各种不同重复模式中出现最多的是(AG/CT)n(3 458次),占二核苷酸重复的50.01%,其次分别是(AC/GT)n(24.47%)和(AT/AT)n(24.23%)。利用Primer 5.0软件共设计了147对EST-SSRs引物。水曲柳ESTs中SSRs出现频率较高,类型丰富,这一研究结果提供了水曲柳EST-SSRs信息,使该分子标记技术在水曲柳研究中的进一步应用成为可能。

关键词: 水曲柳, 简单重复序列, EST-SSR

Abstract: In order to apply the EST-SSRs technique in molecular marker aided breeding, gene localization, and gender identification of Fraxinus mandshurica Rupr., a total of 12 100 ESTs from NCBI database were analyzed. The sizes of non redundant ESTs added up to 3.02×106 bp, which can be clustered into 5 423 clads. A total of 9 489 SSRs loci (6-46 bp in length) were found via SSRIT software. Dinucleotide repeats is a predominated feature of these loci (accounting 72.86%), followed by trinucleotide repeats (24.96%) and tetranucleotide repeats (1.37%). The pattern (AG/CT)n is the most frequent one among all repeat patterns, followed by (AC/GT)n and (AT/AT)n. We designed 147 pairs of EST-SSRs primers by Primer 5.0 software. EST-SSRs in F.mandshurica Rupr displayed a relatively high level of occurrence frequency with abundant patterns. These results will pave the way for application of EST-SSRs molecular marker in F.mandshurica breeding.

Key words: Fraxinus mandshurica Rupr., simple sequence repeat, EST-SSR

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