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<p><i>Camellia impressinervis</i> and <i>Camellia indochinensis</i> are two narrow endemic species with especial yellow flowers, which grows in the karst limestone mountains in Guangxi, China. They are endangered requiring information on genetic structure and diversity to inform conservation efforts. In this study, the chloroplast analysis was based on 10 individuals per population, while the microsatellite analysis included all 203 individuals from eight populations of <i>C. impressinervis</i> and all 277 individuals from 10 populations of <i>C. indochinensis</i>. Our results showed that despite their narrow geographic range, significant population structure was detected in both species, with each population constituting a distinct genetic cluster. Both species maintained relatively high genetic diversity (<i>C. impressinervis</i>: <i>H</i><sub><i>o</i></sub> = 0.593, <i>H</i><sub><i>e</i></sub> = 0.631; <i>C. indochinensis</i>: <i>H</i><sub><i>o</i></sub> = 0.686, <i>H</i><sub><i>e</i></sub> = 0.693). These findings emphasize the need for population-level conservation strategies to preserve the unique genetic resources of these ecologically specialized species.</p>

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Population genetic structure and diversity in two endemic and endangered yellow camellia species from limestone karsts of southern China

  • 期刊论文

  • 发表日期：

    2026年4月11日

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  • Liyin Shi,
  • Shangli Liu,
  • Yanchi Lai,
  • Shaoqing Tang,
  • Sujuan Wei

摘要

Camellia impressinervis and Camellia indochinensis are two narrow endemic species with especial yellow flowers, which grows in the karst limestone mountains in Guangxi, China. They are endangered requiring information on genetic structure and diversity to inform conservation efforts. In this study, the chloroplast analysis was based on 10 individuals per population, while the microsatellite analysis included all 203 individuals from eight populations of C. impressinervis and all 277 individuals from 10 populations of C. indochinensis. Our results showed that despite their narrow geographic range, significant population structure was detected in both species, with each population constituting a distinct genetic cluster. Both species maintained relatively high genetic diversity (C. impressinervis: Ho = 0.593, He = 0.631; C. indochinensis: Ho = 0.686, He = 0.693). These findings emphasize the need for population-level conservation strategies to preserve the unique genetic resources of these ecologically specialized species.