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Development of EST-SSR Markers and their Use in Assessing Genetic Diversity in Chinese Fir Infusion Populations Cover

Development of EST-SSR Markers and their Use in Assessing Genetic Diversity in Chinese Fir Infusion Populations

Open Access
|Jan 2026

Abstract

In advanced-generation tree breeding program, infusion populations are often used as an effective method to expand and maintain genetic diversity. To analyze the genetic diversity and population structure of six Chinese fir (Cunninghamia lanceolata) geographical populations, a total of 20 expressed sequence tag-derived simple sequence repeat markers pairs (EST-SSR) were developed and applied for genetic diversity analysis. The evaluated populations exhibited moderate genetic diversity with the following parameters: number of alleles (Na: 4.850), effective number of alleles (Ne: 2.920), information index (I: 0.958), observed heterozygosity (Ho: 0.319), expected heterozygosity (He: 0.481), unbiased heterozygosity (uHe: 0.496), and fixation index (F: 0.321). The analysis of molecular variance (AMOVA) suggested that only 9.42 % of genetic variation existed among populations, whereas the majority (90.58 %) resided within populations. Cluster analysis showed one population (Sichuan Dechang) as a separate taxon, likely due to its geographical isolation. The present study demonstrated the effectiveness of the developed EST - SSR in analyzing genetic diversity for population.

DOI: https://doi.org/10.2478/sg-2025-0015 | Journal eISSN: 2509-8934 | Journal ISSN: 0037-5349
Language: English
Page range: 165 - 177
Published on: Jan 26, 2026
In partnership with: Paradigm Publishing Services
Publication frequency: 1 issue per year

© 2026 Shuangyun Yang, Liming Bian, Zhiqiang Chen, Renhua Zheng, Shunde Su, Long Zhang, Xueyan Zheng, Yousery A. El-Kassaby, Xie Zhang, published by Johann Heinrich von Thünen Institute
This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 3.0 License.