• 中文核心期刊
  • CSCD来源期刊
  • 中国科技核心期刊
  • CA、CABI、ZR收录期刊

玉带凤蝶线粒体基因组序列结构与分析

Structure and Genome Sequence of Papilio polytes Mitochondria

  • 摘要:
      目的  对玉带凤蝶Papilio polytes的成虫形态特征和幼虫各龄期的特征进行描述,分析玉带凤蝶Papilio polytes完整的线粒体基因组结构特征,丰富蝶类基因组学数据。
      方法  根据翅面斑纹描述形态特征,利用高通量第二代测序技术,构建玉带凤蝶线粒体基因组全序列,分析线粒体基因组结构。
      结果  玉带凤蝶指名亚种和西藏亚种蝶翅面斑纹有较大区别。玉带凤蝶线粒体基因组序列全长15 267 bp(GenBank登录号为MZ188895),包括13个蛋白质编码基因、22个tRNAs基因、2个rRNAs基因和一段控制区。全序列的A+T的平均含量为80.6%,表现明显的A+T偏斜,有11处表现基因间隔,12处表现基因重叠。37个基因中除cox1基因是以TTG为起始密码子,其余蛋白质编码基因均以ATN起始,cox2基因以不完整终止密码子T结尾,核苷酸组成表现明显的AT偏斜,UUA的相对密码子使用频率最高。除trnS1基因,其余21个tRNAs的二级结构均为典型的三叶草结构,二级结构中有U-U或U-G碱基错配现象,其中有9个tRNAs没有出现碱基错配现象。控制区有最高的A+T平均含量,为94.5%。
      结论  玉带凤蝶指名亚种和西藏亚种外部形态的区别主要是由于地位分布位置的不同。玉带凤蝶线粒体基因组结构和基因排列顺序与鳞翅目昆虫线粒体基因组结构和排列一致。

     

    Abstract:
      Objective  Adults and larvae of Papilio Polytes were studied with the complete mitochondrial genome sequenced for the butterfly genomics library collection.
      Method   According to the morphological characteristics of wing markings, sequences of the mitochondrial genomes of P. Polytes were determined using the second-generation Illumina Hiseq 4 000 high-throughput sequencing technology.
      Result  The wing markings of P. polytes polytes was found significantly different from those of P. polytes tibetanus’s. The length of complete mitochondrial genome was 15 267 bp (GenBank accession no. MZ188895) consisting of 13 protein-coding genes, 22 transfer RNAs, 2 ribosomal RNAs, and a control region. The average contents of A+T was 80.6% of the entire sequence representing a significant A+T deflection that had 11 gene intervals and 12 gene overlaps. Except Cox1, all protein coding genes started with ATN, whereas Cox2 ended with codon T. The nucleotide composition showed a significant AT skew. The relative synonymous codon usage (RSCU) of UUA was the highest one. Other than trnS1, the transfer RNAs had the typical clover-leaf-like structure with U-U or U-G base mismatched in the secondary structure and 9 transfer RNAs without mismatch. The A+T average content was the highest in control region at 94.5%.
      Conclusion  Morphologically, P. polytes polytes and P. polytes tibetanus mainly differed in location and distribution of the elements. The structures and sequences of the genomes of P. Polytes mitochondria as determined were in line with those of Lepidoptera insects.

     

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