Polyploidy and introgression in invasive giant knotweed (Fallopia sachalinensis) during the colonization of remote volcanic islands

Abstract Invasive giant knotweed (Fallopia sachalinensis) is native to northeastern Asia. In Korea, F. sachalinensis is confined to two volcanic islands, Ullung and Dok islands, where it occurs as dodecaploids (2n = 132). We investigated the molecular variation in 104 accessions from 94 populations...

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Autores principales:	Chong-Wook Park, Gauri Shankar Bhandari, Hyosig Won, Jin Hee Park, Daniel Sangsoon Park
Formato:	article
Lenguaje:	EN
Publicado:	Nature Portfolio 2018
Materias:	Fallopia Sachalinensis Giant Knotweed Ullung Island Japonica Accessions Sakhalin Island Medicine R Science Q
Acceso en línea:	https://doaj.org/article/dd58b3ca0d3e48feb9f51adc48e644bf
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spelling	oai:doaj.org-article:dd58b3ca0d3e48feb9f51adc48e644bf2021-12-02T15:08:42ZPolyploidy and introgression in invasive giant knotweed (Fallopia sachalinensis) during the colonization of remote volcanic islands10.1038/s41598-018-34025-22045-2322https://doaj.org/article/dd58b3ca0d3e48feb9f51adc48e644bf2018-10-01T00:00:00Zhttps://doi.org/10.1038/s41598-018-34025-2https://doaj.org/toc/2045-2322Abstract Invasive giant knotweed (Fallopia sachalinensis) is native to northeastern Asia. In Korea, F. sachalinensis is confined to two volcanic islands, Ullung and Dok islands, where it occurs as dodecaploids (2n = 132). We investigated the molecular variation in 104 accessions from 94 populations of F. sachalinensis and its relatives throughout their native range to elucidate the origin of these island populations. All F. sachalinensis plants on Ullung and Dok islands were uniquely dodecaploid, whereas other populations were tetraploid (2n = 44). Among the 39 cpDNA haplotypes identified, the accessions from these islands shared two unique haplotypes, and were resolved as a well-supported monophyletic clade. However, this clade was sister to a clade comprising F. japonica accessions from southwestern Japan and separated from the clade comprising F. sachalinensis from other areas; this relationship is inconsistent with morphological evidence. The monophyly of the F. sachalinensis populations on Ullung and Dok islands suggests a single colonization event. The progenitor was likely from Japan, where it possibly captured F. japonica var. japonica cpDNA via introgression. The Ullung Island populations subsequently differentiated through polyploidization and mutations post-introduction. Our results also indicate that giant knotweed in Europe and North America likely originated from northern Japan and/or Sakhalin Island.Chong-Wook ParkGauri Shankar BhandariHyosig WonJin Hee ParkDaniel Sangsoon ParkNature PortfolioarticleFallopia SachalinensisGiant KnotweedUllung IslandJaponica AccessionsSakhalin IslandMedicineRScienceQENScientific Reports, Vol 8, Iss 1, Pp 1-9 (2018)
institution	DOAJ
collection	DOAJ
language	EN
topic	Fallopia Sachalinensis Giant Knotweed Ullung Island Japonica Accessions Sakhalin Island Medicine R Science Q
spellingShingle	Fallopia Sachalinensis Giant Knotweed Ullung Island Japonica Accessions Sakhalin Island Medicine R Science Q Chong-Wook Park Gauri Shankar Bhandari Hyosig Won Jin Hee Park Daniel Sangsoon Park Polyploidy and introgression in invasive giant knotweed (Fallopia sachalinensis) during the colonization of remote volcanic islands
description	Abstract Invasive giant knotweed (Fallopia sachalinensis) is native to northeastern Asia. In Korea, F. sachalinensis is confined to two volcanic islands, Ullung and Dok islands, where it occurs as dodecaploids (2n = 132). We investigated the molecular variation in 104 accessions from 94 populations of F. sachalinensis and its relatives throughout their native range to elucidate the origin of these island populations. All F. sachalinensis plants on Ullung and Dok islands were uniquely dodecaploid, whereas other populations were tetraploid (2n = 44). Among the 39 cpDNA haplotypes identified, the accessions from these islands shared two unique haplotypes, and were resolved as a well-supported monophyletic clade. However, this clade was sister to a clade comprising F. japonica accessions from southwestern Japan and separated from the clade comprising F. sachalinensis from other areas; this relationship is inconsistent with morphological evidence. The monophyly of the F. sachalinensis populations on Ullung and Dok islands suggests a single colonization event. The progenitor was likely from Japan, where it possibly captured F. japonica var. japonica cpDNA via introgression. The Ullung Island populations subsequently differentiated through polyploidization and mutations post-introduction. Our results also indicate that giant knotweed in Europe and North America likely originated from northern Japan and/or Sakhalin Island.
format	article
author	Chong-Wook Park Gauri Shankar Bhandari Hyosig Won Jin Hee Park Daniel Sangsoon Park
author_facet	Chong-Wook Park Gauri Shankar Bhandari Hyosig Won Jin Hee Park Daniel Sangsoon Park
author_sort	Chong-Wook Park
title	Polyploidy and introgression in invasive giant knotweed (Fallopia sachalinensis) during the colonization of remote volcanic islands
title_short	Polyploidy and introgression in invasive giant knotweed (Fallopia sachalinensis) during the colonization of remote volcanic islands
title_full	Polyploidy and introgression in invasive giant knotweed (Fallopia sachalinensis) during the colonization of remote volcanic islands
title_fullStr	Polyploidy and introgression in invasive giant knotweed (Fallopia sachalinensis) during the colonization of remote volcanic islands
title_full_unstemmed	Polyploidy and introgression in invasive giant knotweed (Fallopia sachalinensis) during the colonization of remote volcanic islands
title_sort	polyploidy and introgression in invasive giant knotweed (fallopia sachalinensis) during the colonization of remote volcanic islands
publisher	Nature Portfolio
publishDate	2018
url	https://doaj.org/article/dd58b3ca0d3e48feb9f51adc48e644bf
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Polyploidy and introgression in invasive giant knotweed (Fallopia sachalinensis) during the colonization of remote volcanic islands

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