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Restoring isolated patches of forest ecosystems in degraded landscapes could potentially lead to genetic loss and inbreeding. Therefore, this study determined the occurrence of genetic diversity among the tree species , , and all of which were proven previously to be effective native tree species in the restoration of upland evergreen forests in northern Thailand when using the seed sample collection method. We tested our hypothesis as to whether the genetic diversity of a plant population that had been planted from the seeds of 4-6 adult trees would be lower and whether incidences of fixation index (Fis) would be higher among the second generation seedlings of these three Fagaceae species in isolated forest restoration trial plots. Microsatellite primers were selected from the entire genome sequence of . and the genetic sequences of , , and were analyzed. Our results indicated a high degree of genetic diversity (He) in (0.736) and . (0.481); however, a low level of genetic diversity was observed in . (0.281) within the restored forest. The fixation index for the second generation of . and . in the restored forest showed evidence of inbreeding. These results imply the efficiency of the seed sample collection method and verify that it does not reduce the level of genetic diversity in . and . . However, it may result in incidences of an inbreeding phenomena, suggesting the need to increase the number of adult trees used at the seed collection stage.
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Source |
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http://www.ncbi.nlm.nih.gov/pmc/articles/PMC6544010 | PMC |
http://dx.doi.org/10.7717/peerj.6958 | DOI Listing |
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