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<p><i>Syagrus glaucescens</i> is an endemic and critically endangered palm species restricted to the Espinhaço Range in Brazil. Adapted to harsh environments—such as nutrient-poor soils and seasonal drought—this species faces severe population decline, emphasizing the urgency of developing genetic conservation strategies. In this study, we evaluated the transferability and effectiveness of microsatellite markers originally developed for <i>Syagrus coronata</i> to assess the genetic diversity and structure of <i>S. glaucescens</i> populations. Thirteen out of fifteen tested microsatellites successfully amplified in <i>S. glaucescens</i> (87% transferability), with eight showing polymorphisms among individuals from two remnant populations. The expected heterozygosity was moderate (<i>He</i> = 0.583), with some loci reaching values as high as 0.81, indicating considerable genetic diversity within populations despite the species’ rarity. Genetic structure analyses revealed clear separation between <i>S. glaucescens</i> and <i>S. coronata</i>, with a high interspecific genetic distance (<i>Nei</i> = 0.505), supporting their taxonomic distinction and independent evolutionary trajectories. These findings confirm the utility of transferred microsatellites for detecting genetic variation and provide essential baseline data for conservation planning. By revealing intra- and interpopulation diversity and confirming the distinct genetic identity of <i>S. glaucescens</i>, our results contribute directly to the design of ex situ conservation actions, germplasm collection strategies, and long-term management of this endangered species in the Espinhaço Range.</p>

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Microsatellite Transferability for Conservation of the Endangered Species Syagrus glaucescens (Arecaceae) in the Rupestrian Grasslands Ecoregion

  • 期刊论文

  • 发表日期：

    2025年6月3日

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  • Wassali Valadares de Sousa,
  • Sérgio Yoshimitsu Motoike,
  • Geís Ferreira Neves,
  • Sebastian Giraldo Montoya,
  • Guilherme da Silva Pereira,
  • Milene de Figueiredo,
  • Kacilda Naomi Kuki

摘要

Syagrus glaucescens is an endemic and critically endangered palm species restricted to the Espinhaço Range in Brazil. Adapted to harsh environments—such as nutrient-poor soils and seasonal drought—this species faces severe population decline, emphasizing the urgency of developing genetic conservation strategies. In this study, we evaluated the transferability and effectiveness of microsatellite markers originally developed for Syagrus coronata to assess the genetic diversity and structure of S. glaucescens populations. Thirteen out of fifteen tested microsatellites successfully amplified in S. glaucescens (87% transferability), with eight showing polymorphisms among individuals from two remnant populations. The expected heterozygosity was moderate (He = 0.583), with some loci reaching values as high as 0.81, indicating considerable genetic diversity within populations despite the species’ rarity. Genetic structure analyses revealed clear separation between S. glaucescens and S. coronata, with a high interspecific genetic distance (Nei = 0.505), supporting their taxonomic distinction and independent evolutionary trajectories. These findings confirm the utility of transferred microsatellites for detecting genetic variation and provide essential baseline data for conservation planning. By revealing intra- and interpopulation diversity and confirming the distinct genetic identity of S. glaucescens, our results contribute directly to the design of ex situ conservation actions, germplasm collection strategies, and long-term management of this endangered species in the Espinhaço Range.