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Forests 2017, 8(11), 451;

Genetic Variation in Quercus acutissima Carruth., in Traditional Japanese Rural Forests and Agricultural Landscapes, Revealed by Chloroplast Microsatellite Markers

Graduate School of Agricultural and Life Sciences, University of Tokyo, 1-1-1, Yayoi, Bunkyo, Tokyo 113-8657, Japan
Sugadaira Research Station, Mountain Science Center, University of Tsukuba, 1278-294 Sugadairakogen, Ueda, Nagano 386-2204, Japan
Department of Forest Molecular Genetics and Biotechnology, Forestry and Forest Products Research Institute, Matsunosato 1, Tsukuba, Ibaraki 305-8687, Japan
NTT DATA Intellink Corporation, Tsukishima 1-15-7, Chuo, Tokyo 104-0052, Japan
Mynavi Corporation, Chiyoda, Tokyo 100-0003, Japan
School of Ecological and Environmental System, Kyungpook National University, Sangju 742-711, Korea
State Key Laboratory of Forest Genetics and Breeding, Northeast Forestry University, Hexing Road 26, Harbin 150040, China
Author to whom correspondence should be addressed.
Received: 23 August 2017 / Revised: 1 November 2017 / Accepted: 13 November 2017 / Published: 17 November 2017
(This article belongs to the Special Issue Genetics and Genomics of Forest Trees)
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Quercus acutissima Carruth. is an economically important species that has long been cultivated in Japan, so is a valuable subject for investigating the impact of human activities on genetic variation in trees. In total, 2152 samples from 18 naturally regenerated populations and 28 planted populations in Japan and 13 populations from the northeastern part of Eurasia, near Japan, were analyzed using six maternally inherited chloroplast (cpDNA) simple sequence repeat (SSR) markers. Although 23 haplotypes were detected in total, both the Japanese natural and artificial populations exhibited much lower genetic diversity than the continental populations. The level of genetic differentiation among natural populations in Japan was also much lower (GST = 0.261) than that on the continent (GST = 0.856). These results suggest that human activities, such as historical seed transfer, have reduced genetic diversity within and among populations and resulted in a homogeneous genetic structure in Japan. The genetic characteristics of natural and artificial populations of Quercus acutissima in Japan are almost the same and it is likely that most of the natural populations are thought to have originated from individuals that escaped from plantations. View Full-Text
Keywords: genetic structure; human impact; seed transportation; artificial forest genetic structure; human impact; seed transportation; artificial forest

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Saito, Y.; Tsuda, Y.; Uchiyama, K.; Fukuda, T.; Seto, Y.; Kim, P.-G.; Shen, H.-L.; Ide, Y. Genetic Variation in Quercus acutissima Carruth., in Traditional Japanese Rural Forests and Agricultural Landscapes, Revealed by Chloroplast Microsatellite Markers. Forests 2017, 8, 451.

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