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Forests 2017, 8(12), 495; doi:10.3390/f8120495

Genetic Diversity and Structure of Natural Quercus variabilis Population in China as Revealed by Microsatellites Markers

1,†
,
2,†
,
1
,
1
and
1,*
1
Co-Innovation Center for Sustainable Forestry in Southern China, Nanjing Forestry University, Nanjing 210037, China
2
Plant Bio-tech Key Laboratory of Jiangxi Province, Jiangxi Academy of Forestry, Nanchang 330013, China
These two authors contribute equally to this work.
*
Author to whom correspondence should be addressed.
Received: 3 November 2017 / Revised: 6 December 2017 / Accepted: 7 December 2017 / Published: 11 December 2017
(This article belongs to the Special Issue Genetics and Genomics of Forest Trees)
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Abstract

Quercus variabilis is a tree species of ecological and economic value that is widely distributed in China. To effectively evaluate, use, and conserve resources, we applied 25 pairs of simple sequence repeat (SSR) primers to study its genetic diversity and genetic structure in 19 natural forest or natural secondary forest populations of Q. variabilis (a total of 879 samples). A total of 277 alleles were detected. Overall, the average expected heterozygosity (He) was 0.707 and average allelic richness (AR) was 7.79. Q. variabilis manifested a loss of heterozygosity, and the mean of inbreeding coefficient (FIS) was 0.044. Less differentiation among populations was observed, and the genetic differentiation coefficient (FST) was 0.063. Bayesian clustering analysis indicated that the 19 studied populations could be divided into three groups based on their genetic makeup, namely, the Southwest group, Central group, and Northeastern group. The Central group, compared to the populations of the Southwest and Northeast group, showed higher genetic diversities and lower genetic differentiations. As a widely distributed species, the historical migration of Q. variabilis contributed to its genetic differentiation. View Full-Text
Keywords: Quercus variabilis; SSR; genetic diversity; population structure Quercus variabilis; SSR; genetic diversity; population structure
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Shi, X.; Wen, Q.; Cao, M.; Guo, X.; Xu, L.-A. Genetic Diversity and Structure of Natural Quercus variabilis Population in China as Revealed by Microsatellites Markers. Forests 2017, 8, 495.

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