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<p>Lettuce (<i>Lactuca sativa</i> var. <i>ramosa</i> Hort) is an important leaf vegetable that widely cultivates due to its high-quality, short growth cycle, and less diseases. <i>L. sativa</i> var. <i>ramosa</i> Hort belongs to Asteraceae family and its evolutionary relationships with related species of Asteraceae are not completely assessed based on genome sequences. Here, we assembled the whole mitochondrial (mt) genome of <i>L. sativa</i> var. <i>ramosa</i> Hort, and performed a comparative with other related species. The <i>L. sativa</i> var. <i>ramosa</i> Hort mt genome has a typical circular structure with a length of 363,324&#xa0;bp, within GC content accounted for 45.35%. In total of 71 genes, comprising 35 protein-coding genes (PCGs), 6 rRNAs, 28 tRNAs, and 2 pseudogenes were annotated. Codon preference, RNA-editing sites, repetitive sequences, and genes migrating from chloroplast (cp) to mt genomes were investigated in the <i>L. sativa</i> var. <i>ramosa</i> Hort mt genome. Nucleotide diversity (Pi) showed that the <i>L. sativa</i> var. <i>ramosa</i> Hort mt genome was relatively conserved. A Bayesian phylogenetic tree showed that <i>L. sativa</i> var. <i>ramosa</i> Hort was closely to <i>L. sativa</i> var<i>. capitata</i> and <i>L. virosa</i>, which belonged to the <i>Lactuca</i> genus in the Asteraceae family. Our findings will provide useful information to explore genetic variation, genetic diversity, and molecular breeding on the <i>Lactuca</i> genus.</p>

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Assembly and comparative analysis of the complete mitochondrial genome of Lactuca sativa var. ramosa Hort

  • 期刊论文

  • 出版模式：

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  • 发表日期：

    2025年3月18日

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  • Yihui Gong,
  • Yalin Qin,
  • Rong Liu,
  • Yuanyuan Wei,
  • Haotian Liu,
  • Peng Li,
  • Guihua Zhou

摘要

Lettuce (Lactuca sativa var. ramosa Hort) is an important leaf vegetable that widely cultivates due to its high-quality, short growth cycle, and less diseases. L. sativa var. ramosa Hort belongs to Asteraceae family and its evolutionary relationships with related species of Asteraceae are not completely assessed based on genome sequences. Here, we assembled the whole mitochondrial (mt) genome of L. sativa var. ramosa Hort, and performed a comparative with other related species. The L. sativa var. ramosa Hort mt genome has a typical circular structure with a length of 363,324 bp, within GC content accounted for 45.35%. In total of 71 genes, comprising 35 protein-coding genes (PCGs), 6 rRNAs, 28 tRNAs, and 2 pseudogenes were annotated. Codon preference, RNA-editing sites, repetitive sequences, and genes migrating from chloroplast (cp) to mt genomes were investigated in the L. sativa var. ramosa Hort mt genome. Nucleotide diversity (Pi) showed that the L. sativa var. ramosa Hort mt genome was relatively conserved. A Bayesian phylogenetic tree showed that L. sativa var. ramosa Hort was closely to L. sativa var. capitata and L. virosa, which belonged to the Lactuca genus in the Asteraceae family. Our findings will provide useful information to explore genetic variation, genetic diversity, and molecular breeding on the Lactuca genus.