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RISS 인기검색어
- 검색키워드
- 저자 : Kurokochi, Hiroyuki (검색결과 4 건)
- 무료
- 기관 내 무료
- 유료
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Kurokochi, Hiroyuki,Hogetsu, Taizo The Ecological Society of Korea 2014 Journal of Ecology and Environment Vol.37 No.1
Robinia pseudoacacia has become invasively naturalized in Japan. We investigated the role of sexual reproduction in the development of R. pseudoacacia riparian forests along the Chikumagawa River in Japan, by using five chloroplast (cpSSR) and seven nuclear (nSSR) markers. We identified eight chloroplast haplotypes and 147 nuclear genotypes from 619 R. pseudoacacia trees sampled in three plots (Plots A, B, and C) and along two line transects (Lines D and E). CpSSR analyses showed that multiple maternal lines were distributed along the river, and that some haplotypes from different populations overlapped. In addition, while Plots A and B were separated by a short distance, only these two plots exhibited genetic differentiation in the haplotypes. In the nSSR analysis, all pairwise $F_{ST}$ values among the three plots were significantly different from zero. Kinship analysis based on nSSR markers revealed that kinship connected many individuals to another individual from the same plot. These results indicate that seed dispersal near to mother trees contributes to the fine-scale genetic structure of R. pseudoacacia riparian forests. Our results indicate that sexual reproduction, in addition to asexual reproduction, is a major contributor to the fine-scale formation of R. pseudoacacia forests.
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Hiroyuki Kurokochi,Taizo Hogetsu 한국생태학회 2014 Journal of Ecology and Environment Vol.37 No.1
Robinia pseudoacacia has become invasively naturalized in Japan. We investigated the role of sexual reproduction in thedevelopment of R. pseudoacacia riparian forests along the Chikumagawa River in Japan, by using five chloroplast (cpSSR)and seven nuclear (nSSR) markers. We identified eight chloroplast haplotypes and 147 nuclear genotypes from 619 R. pseudoacacia trees sampled in three plots (Plots A, B, and C) and along two line transects (Lines D and E). CpSSR analysesshowed that multiple maternal lines were distributed along the river, and that some haplotypes from different populationsoverlapped. In addition, while Plots A and B were separated by a short distance, only these two plots exhibitedgenetic differentiation in the haplotypes. In the nSSR analysis, all pairwise FST values among the three plots were significantlydifferent from zero. Kinship analysis based on nSSR markers revealed that kinship connected many individuals toanother individual from the same plot. These results indicate that seed dispersal near to mother trees contributes to thefine-scale genetic structure of R. pseudoacacia riparian forests. Our results indicate that sexual reproduction, in additionto asexual reproduction, is a major contributor to the fine-scale formation of R. pseudoacacia forests.
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Expansion of an invasive species, Ailanthus altissima, at a regional scale in Japan
Chuman, Misaki,Kurokochi, Hiroyuki,Saito, Yoko,Ide, Yuji The Ecological Society of Korea 2015 Journal of Ecology and Environment Vol.38 No.1
Ailanthus altissima, which is recognized as an invasive tree in the Western world, has been widely observed in Japan. To investigate how A. altissima expanded within-population and to new populations within a region, 446 A. altissima trees were sampled from three separate sites (A, B, and C) including 35 distantly positioned patches, with three chloroplast DNA markers and nine nuclear microsatellite markers. We detected 2, 2, and 3 chloroplast haplotypes in sites A, B, and C, respectively. In addition, 271, 40, and 41 nuclear genotypes were detected in sites A, B, and C, respectively. The clonal richness value was 0.85, 0.78, and 0.53 in sites A, B, and C, respectively. Most trees with the same genotypes were distributed in the same patch, indicating that range expansion by asexual reproduction was limited to a maximum of 45 meters. According to autocorrelation analysis, the extent of nonrandom spatial genetic structure was approximately 0-2 km in sites A and C. KINGROUP analyses showed that 812, 74, and 111 nuclear genotype pairs were detected to have kinship in sites A, B, and C, respectively. Most nuclear genotype pairs were detected within the same patches or sites. These results indicate that the number of A. altissima trees gradually increased from seeds, some of which were produced by trees within sites, meaning that this species could regenerate naturally. This shows the need for the future management of A. altissima as an invasive species in Japan.
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Expansion of an invasive species, Ailanthus altissima, at a regional scale in Japan
Masaki Chuman,Hiroyuki Kurokochi,Yoko Saito,Yuji Ide 한국생태학회 2015 Journal of Ecology and Environment Vol.38 No.1
Ailanthus altissima, which is recognized as an invasive tree in the Western world, has been widely observed in Japan. To investigate how A. altissima expanded within-population and to new populations within a region, 446 A. altissima trees were sampled from three separate sites (A, B, and C) including 35 distantly positioned patches, with three chloroplast DNA markers and nine nuclear microsatellite markers. We detected 2, 2, and 3 chloroplast haplotypes in sites A, B, and C, respectively. In addition, 271, 40, and 41 nuclear genotypes were detected in sites A, B, and C, respectively. The clonal richness value was 0.85, 0.78, and 0.53 in sites A, B, and C, respectively. Most trees with the same genotypes were distrib¬uted in the same patch, indicating that range expansion by asexual reproduction was limited to a maximum of 45 meters. According to autocorrelation analysis, the extent of nonrandom spatial genetic structure was approximately 0-2 km in sites A and C. KINGROUP analyses showed that 812, 74, and 111 nuclear genotype pairs were detected to have kinship in sites A, B, and C, respectively. Most nuclear genotype pairs were detected within the same patches or sites. These results indicate that the number of A. altissima trees gradually increased from seeds, some of which were produced by trees within sites, meaning that this species could regenerate naturally. This shows the need for the future management of A. altissima as an invasive species in Japan.
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