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<p><i>Cedrela fissilis</i> Vell (Meliaceae) is a commercially valuable tree species that is known for the high quality of its timber. It has been classified as a vulnerable species due to the decline of its natural populations caused by overexploitation of its timber. Genetic resources play a key role in conservation strategies. Therefore, we have sequenced and detailed the complete plastome of <i>C. fissilis</i>. The plastome is a typical four-part structure of 158,507&#xa0;bp, containing 112 genes (78 protein-coding, 30 tRNAs, and four rRNAs) and one pseudogene (<i>infA</i>). Comparative structural analyses involving 19 other Meliaceae species revealed that they have a highly conserved plastome. Using the completed plastome, we constructed a phylogenomic tree showing the relationships among different species within Meliaceae. The analysis placed <i>C. fissilis</i> together with <i>C. odorata</i>. We identified 227 SSRs and seven nucleotide diversity hotspots in the <i>Cedrela</i> plastome. Moreover, RNA editing sites were predicted for all species. We found conserved sites at the family, subfamily, and genus level (<i>Cedrela</i>). Finally, the genomic resources here found serve as a baseline for the development of molecular markers to be used in future conservation strategies for this species.</p>

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Complete plastome sequence of Cedrela fissilis Vell. (Meliaceae): genetic insights for conservation purposes

  • 期刊论文

  • 发表日期：

    2025年9月21日

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  • Mayra A. Muñoz Urbano,
  • Maria C. da Silva,
  • João A. Nascimento dos Reis,
  • José D. de Oliveira,
  • Amanda de Santana Lopes,
  • Túlio Gomes Pacheco,
  • Leila do Nascimento Vieira,
  • Valter A. de Baura,
  • Fábio de Oliveira Pedrosa,
  • Emanuel Maltempi de Souza,
  • Marcelo Rogalski

摘要

Cedrela fissilis Vell (Meliaceae) is a commercially valuable tree species that is known for the high quality of its timber. It has been classified as a vulnerable species due to the decline of its natural populations caused by overexploitation of its timber. Genetic resources play a key role in conservation strategies. Therefore, we have sequenced and detailed the complete plastome of C. fissilis. The plastome is a typical four-part structure of 158,507 bp, containing 112 genes (78 protein-coding, 30 tRNAs, and four rRNAs) and one pseudogene (infA). Comparative structural analyses involving 19 other Meliaceae species revealed that they have a highly conserved plastome. Using the completed plastome, we constructed a phylogenomic tree showing the relationships among different species within Meliaceae. The analysis placed C. fissilis together with C. odorata. We identified 227 SSRs and seven nucleotide diversity hotspots in the Cedrela plastome. Moreover, RNA editing sites were predicted for all species. We found conserved sites at the family, subfamily, and genus level (Cedrela). Finally, the genomic resources here found serve as a baseline for the development of molecular markers to be used in future conservation strategies for this species.