文献类型：期刊文献

英文题名：Genetic diversity and population structure of Camellia reticulata Lindl., a mixed-ploidy tree species in Southwestern China

作者：Wang, Caiyun[1] Yin, Mingyu[1] Huang, Jiacong[2] Guo, Junjie[1] Zeng, Jie[1]

通信作者：Zeng, J[1];Huang, JC[2]

机构：[1]Chinese Acad Forestry, Res Inst Trop Forestry, Guangzhou 510520, Guangdong, Peoples R China;[2]Forestry & Grassland Tech Promot Stn Baoshan City, Baoshan 678000, Yunnan, Peoples R China

年份：2025

卷号：21

期号：6

外文期刊名：TREE GENETICS & GENOMES

收录：;Scopus(收录号：2-s2.0-105020282057);WOS:【SCI-EXPANDED(收录号:WOS:001602702500001)】；

基金：The authors thank forest and grass departments of each city or prefecture in the study areas for providing investigation and sampling supports.

语种：英文

外文关键词：Camellia reticulata lindl.; Genetic variation; Microsatellite markers; Polyploid

摘要：Camellia reticulata Lindl., an endemic polyploid complex in southwestern China, has considerable ornamental value and great potential for edible oil production. However, its natural populations have declined dramatically due to illegal poaching for horticultural trade and anthropogenic habitat destruction. Therefore, evaluating the genetic diversity and population structure of C. reticulata is imperative for the conservation of its genetic resources and the development of its breeding strategies. This study developed 22 SSR loci and applied them to assess the genetic diversity of 292 C. reticulata individuals from eight natural populations. These loci detected 434 alleles, with a mean of 19.727 alleles per locus (Na). The expected heterozygosity (He), polymorphic information content (PIC), and Shannon's information index (I) were 0.828, 0.811, and 2.132 at the species level, and were 0.773, 0.746 and 1.805 at the population level, respectively, indicating a high level of genetic diversity in C. reticulata. Analysis of molecular variance showed that most genetic variation (81.27%) existed within populations. Bayesian clustering classified the eight populations into two distinct clusters. The high genetic diversity of C. reticulata may be attributed to polyploidization and habitat heterogeneity across its natural ranges.