Introgression and Long-Term Naturalization of Archaeophytes into Native Plants - Underestimated Risk of Hybrids

Iketani, Hiroyuki; Katayama, Hironori

doi:10.5772/37585

Cited by 3 publications

(2 citation statements)

References 33 publications

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“…This result is consistent with the previous reports that P . ussuriensis growing wild in Northern part of Japan was introgressed from Japanese pear cultivars [ 17 , 62 ].…”

Section: Discussionmentioning

confidence: 99%

Population Structure of and Conservation Strategies for Wild Pyrus ussuriensis Maxim. in China

Wuyun

Amo

Xu³

et al. 2015

PLoS ONE

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Pyrus ussriensis Maxim. is native to the northern part of China, but whose habitats are currently being destroyed by environmental changes and human deforestation. An investigation of population structure and genetic diversity of wild Ussurian pear is a priority in order to acquire fundamental knowledge for conservation. A total of 153 individuals of wild Ussurian pear from the main habitats, Heilongjiang, Jilin, and Inner Mongolia in China, possessed low genetic diversity as a result of habitat fragmentation. The genetic diversity of the populations in Inner Mongolia and north east of Heilongjiang was especially low and there was the possibility of inbreeding. Wild Ussurian pears were divided into 5 groups based on the Bayesian clustering method using 20 nuclear SSRs (nSSRs) and 5 groups by haplotype distributions using 16 chloroplast SSRs (cpSSRs), and the populations in Inner Mongolia and north east of Heilongjiang represented unique genotypes. AMOVA indicated there was a 20.05% variation in nSSRs and a 44.40% variation in cpSSRs among populations. These values are relatively high when compared to those of other tree species. Haplotype E, positioned in the center of the cpSSR analysis network and showed the largest number of connections with other haplotypes, represented the most important haplotype. Inner Mongolia and the north east of Heilongjiang are two areas that need urgent conservation because of their genetic vulnerability and peculiarity. We determined 4 conservation units based on the clustering by nSSRs and cpSSRs, and geographic factor. This information is helpful in deciding the conservation strategies for wild Ussurian pear in China.

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“…This result is consistent with the previous reports that P . ussuriensis growing wild in Northern part of Japan was introgressed from Japanese pear cultivars [ 17 , 62 ].…”

Section: Discussionmentioning

confidence: 99%

Population Structure of and Conservation Strategies for Wild Pyrus ussuriensis Maxim. in China

Wuyun

Amo

Xu³

et al. 2015

PLoS ONE

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“…aromatica, syn. of Michinokunashi) is endemic in Northern Tohoku, Japan (Iketani et al 2010, Iketani and Katayama 2012, Katayama and Uematsu 2006, Katayama et al 2007. As indicated by its Latin name, 'aromatica', good odor is an obvious characteristic of Iwateyamanashi fruit (Nakai 1919).…”

Section: Introductionmentioning

confidence: 99%

Diversity of odor-active compounds from local cultivars and wild accessions of Iwateyamanashi (<i>Pyrus ussuriensis</i> var. <i>aromatica</i>) revealed by Aroma Extract Dilution Analysis (AEDA)

2013

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Genetic structure and diversity of the wild Ussurian pear in East Asia

et al. 2016

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The Ussurian pear is the most important cultivated pear in the northern part of China. Cultivated Ussurian pears are considered to have derived from Pyrus ussuriensis Maxim. which is native to the northeast of China. In Japan, two varieties of P. ussuriensis, P. ussuriensis var. aromatica and var. hondoensis are native to the northern area and the central area of the main island respectively. In order to reveal the origin of Pyrus ussuriensis var. aromatica distributed in the northern area of main island of Japan, more than 40 explorations have been performed in Japan and in China, and more than 30 natural habitats were recognized. These natural habitats are at risk of extinction because of human development and forest degradation caused by climate change. Population structure and genetic diversity of P. ussuriensis in China and P. ussuriensis var. aromatica in Japan have been investigated using both morphological and molecular markers in order to define appropriate conservation units, and to provide a good focus for conservation management. Distant evolutionary relationships between P. ussuriensis Maxim. in China and P. ussuriensis var. aromatica in Japan inferred from population genetic structure and phylogenetic analysis are also discussed.

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Introgression and Long-Term Naturalization of Archaeophytes into Native Plants - Underestimated Risk of Hybrids

Cited by 3 publications

References 33 publications

Population Structure of and Conservation Strategies for Wild Pyrus ussuriensis Maxim. in China

Population Structure of and Conservation Strategies for Wild Pyrus ussuriensis Maxim. in China

Diversity of odor-active compounds from local cultivars and wild accessions of Iwateyamanashi (<i>Pyrus ussuriensis</i> var. <i>aromatica</i>) revealed by Aroma Extract Dilution Analysis (AEDA)

Genetic structure and diversity of the wild Ussurian pear in East Asia

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