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Volume 12
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10.3390/f12070917
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Article

Study on the Genetic Structure Based on Geographic Populations of the Endangered Tree Species: Liriodendron chinense

by
Peng-Yan Zhou
1,†,
Li-Xing Hui
1,†,
Shu-Jing Huang
1,
Zhou-Xian Ni
1,
Fa-Xin Yu
2 and
Li-An Xu
1,*
1
Co-Innovation Center for Sustainable Forestry in Southern China, Nanjing Forestry University, Nanjing 210037, China
2
The Key Laboratory of Horticultural Plant Genetic and Improvement of Jiangxi Province, Institute of Biological Resources, Jiangxi Academy of Sciences, Nanchang 330096, China
*
Author to whom correspondence should be addressed.
†
Peng-Yan Zhou and Li-Xing Hui contributed equal.
Forests 2021, 12(7), 917; https://doi.org/10.3390/f12070917
Submission received: 21 June 2021 / Revised: 9 July 2021 / Accepted: 12 July 2021 / Published: 14 July 2021
(This article belongs to the Special Issue Biodiversity Conservation and Forest Management—Trends and Perspectives)
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Abstract

Liriodendron chinense (Hemsley) Sargent is a Class II protected plant in China as natural populations are on the verge of extinction. There is still a lack of systematic research on the genetic resources of its geographic populations. In this study, we used 20 pairs of SSR markers with high polymorphism to analyze a total of 808 L. chinense samples from 22 regions, and 63 Liriodendron tulipifera Linn samples from 2 regions were used as a comparison group. The results revealed a total of 78 alleles in L. chinense, and the average expected heterozygosity (He) was 0.558, showing a low level of genetic diversity. The degree of differentiation of L. chinense was high, with the differentiation coefficient (Fst) as high as 0.302, which is related to the low gene flow (Nm = 0.578). Based on the genetic structure, principal coordinate analysis (PCoA) and phylogenetic analysis of 24 Liriodendron spp. populations, L. chinense and L. tulipifera had obvious differentiation, while the differentiation between L. chinense geographic populations was very large and irregular. Inbreeding appears within the geographic populations, and the level of genetic diversity is very low. In order to protect the genetic diversity of L. chinense, in addition to protecting the existing population as much as possible, artificial cultivation should introduce materials from multiple populations.
Keywords: conservation biology; genetic diversity; genetic structure; Liriodendron chinense; phylogeography; species distribution pattern conservation biology; genetic diversity; genetic structure; Liriodendron chinense; phylogeography; species distribution pattern

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MDPI and ACS Style

Zhou, P.-Y.; Hui, L.-X.; Huang, S.-J.; Ni, Z.-X.; Yu, F.-X.; Xu, L.-A. Study on the Genetic Structure Based on Geographic Populations of the Endangered Tree Species: Liriodendron chinense. Forests 2021, 12, 917. https://doi.org/10.3390/f12070917

AMA Style

Zhou P-Y, Hui L-X, Huang S-J, Ni Z-X, Yu F-X, Xu L-A. Study on the Genetic Structure Based on Geographic Populations of the Endangered Tree Species: Liriodendron chinense. Forests. 2021; 12(7):917. https://doi.org/10.3390/f12070917

Chicago/Turabian Style

Zhou, Peng-Yan, Li-Xing Hui, Shu-Jing Huang, Zhou-Xian Ni, Fa-Xin Yu, and Li-An Xu. 2021. "Study on the Genetic Structure Based on Geographic Populations of the Endangered Tree Species: Liriodendron chinense" Forests 12, no. 7: 917. https://doi.org/10.3390/f12070917

APA Style

Zhou, P.-Y., Hui, L.-X., Huang, S.-J., Ni, Z.-X., Yu, F.-X., & Xu, L.-A. (2021). Study on the Genetic Structure Based on Geographic Populations of the Endangered Tree Species: Liriodendron chinense. Forests, 12(7), 917. https://doi.org/10.3390/f12070917

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