A taxonomic, cytological and genetic survey of Japanese knotweed<i>s.l.</i>in New Zealand indicates multiple secondary introductions from Europe and a direct introduction from Japan

Desjardins, Stuart D.; Pashley, Catherine H.; Bailey, John P.

doi:10.1080/0028825x.2022.2090848

Cited by 6 publications

(17 citation statements)

References 24 publications

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“…compacta) and tetraploid F. sachalinensis (e.g., Bailey et al 1996, Bailey & Wisskirchen 2006, Tiébré et al 2007a, Bailey 2013, Stace & Crawley 2015. This fact was also confirmed in English and New Zealand plants by molecular data (Hollingsworth et al 1999, Pashley 2003, Tiébré et al 2007a, Desjardins 2015, Desjardins et al 2022). In the case of Moravian plants, isozyme data also point to their origin from hybridisation between F. compacta and F. sachalinensis (Mandák et al 2005: 224).…”

Section: Introductionmentioning

confidence: 66%

“…8A & 8B). In the literature, stem spotting is not mentioned anywhere when describing hybrid plants between F. compacta and F. sachalinensis (i.e., F. ×moravica in our study; see, e.g., Bailey et al 1996, Hollingsworth et al 1999, Pashley 2003, Bailey & Wisskirchen 2006, Sell & Murrell 2018, Desjardins et al 2022. However, according to our research, F. ×bohemica typically has more or less distinct purple spots on most or at least one internode of the main stem and/or lateral branches (Figs.…”

Section: Taxonomymentioning

confidence: 77%

“…Detailed cytotype screening of mature European Fallopia ×bohemica individuals revealed three major cytotypes: tetra-, hexa-and octoploid, with the hexaploid cytotype clearly predominant (Mandák et al 2003, Bailey & Wisskirchen 2006, Tiébré et al 2007a, Suda et al 2010, Holm et al 2018, Desjardins et al 2022. It is well documented that the hexaploid cytotype originated from the unidirectional crossing between female octoploid F. japonica var.…”

Section: Introductionmentioning

confidence: 99%

“…It is well documented that the hexaploid cytotype originated from the unidirectional crossing between female octoploid F. japonica var. japonica and functionally male tetraploid F. sachalinensis (Bailey & Wisskirchen 2006, Hollingsworth et al 1999, Desjardins et al 2022. In contrast, the octoploid cytotype of F. ×bohemica may have several theoretical routes of origin (e.g., pollination of female octoploid F. japonica var.…”

Section: Introductionmentioning

confidence: 99%

“…In contrast, the octoploid cytotype of F. ×bohemica may have several theoretical routes of origin (e.g., pollination of female octoploid F. japonica var. japonica by an unreduced gamete from functionally male tetraploid F. sachalinensis), but none has yet been proven with certainty (Bailey & Wisskirchen 2006, Bailey 2013, Desjardins et al 2022. Thus, the taxonomy of octoploid F. ×bohemica requires further study.…”

Section: Introductionmentioning

confidence: 99%

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Fallopia ×moravica (Polygonaceae), a new hybrid between Fallopia compacta and F. sachalinensis

Hodálová

MÁRTONFIOVÁ²,

Skokanová³

et al. 2022

Phytotaxa

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A new knotweed hybrid originating from the crossing of Fallopia compacta and F. sachalinensis is described based on plant material collected in the Moravia region in the Czech Republic as F. ×moravica. In addition to the Czech Republic, the hybrid has also been reported previously from the United Kingdom and New Zealand; however, it was not distinguished from F. ×bohemica, a hybrid between F. japonica and F. sachalinensis, since its one parent (F. compacta) has been generally treated only as a variety of F. japonica. F. ×moravica differs from the morphologically most similar hexaploid (2n = 6x = 66) F. ×bohemica by its tetraploid (2n = 4x = 44) number of chromosomes and by the constant absence of purple spots on stem internodes (which are usually present in F. ×bohemica). The new hybrid also differs from F. ×bohemica as well as other European Fallopia members by its unique relative genome size. Other potential morphological and cytological differences of F. ×moravica from the related F. ×bohemica are discussed.

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Section: Introductionmentioning

confidence: 66%

Section: Taxonomymentioning

confidence: 77%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 3 more Smart Citations

Fallopia ×moravica (Polygonaceae), a new hybrid between Fallopia compacta and F. sachalinensis

Hodálová

MÁRTONFIOVÁ²,

Skokanová³

et al. 2022

Phytotaxa

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Away-range shifts in leaf function of a global invader: a case of resource reallocation?

Griffin-Nolan,

Bensaddek,

Decocq

et al. 2024

Biol Invasions

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A knot of hybrids: Differentiating Asian knotweeds in North‐Eastern France using genetic, cytological, and morphological data

Jugieau,

Talmot,

Staentzel

et al. 2024

J of Sytematics Evolution

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The two invasive Reynoutria species, Reynoutria japonica var. japonica and Reynoutria sachalinensis, and their hybrid Reynoutria x bohemica are often misidentified by managers and nonspecialists. The taxonomic confusions are all the more exacerbated by the infraspecific variability of introduced populations in terms of morphology, genetic diversity, and ploidy level. We resolved the identity of North‐Eastern French invasive populations using 4582 single‐nucleotide polymorphisms (SNPs) from a RADseq analysis, DNA contents estimated by flow cytometry, and 12 vegetative morphometric variables. The SNPs supported only one single genotype for R. japonica over 11 localities, while the nine localities of Reynoutria x bohemica were represented by one genotype each. Estimation of genome size using DAPI staining and flow cytometry revealed only octoploid cytotypes for R. japonica and hexaploid cytotypes for R. x bohemica, whereas R. sachalinensis was represented by tetraploid and hexaploid cytotypes. Among morphometric variables, no single one allows for a clear differentiation of the three taxa. We propose a combination of characters to easily and quickly identify these three invasive taxa based on six vegetative criteria including leaf and apex length, as well as leaf shape, leaf base, and apex shape, and the extrafloral nectaries on the node.

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A taxonomic, cytological and genetic survey of Japanese knotweeds.l.in New Zealand indicates multiple secondary introductions from Europe and a direct introduction from Japan

Cited by 6 publications

References 24 publications

Fallopia ×moravica (Polygonaceae), a new hybrid between Fallopia compacta and F. sachalinensis

Fallopia ×moravica (Polygonaceae), a new hybrid between Fallopia compacta and F. sachalinensis

Away-range shifts in leaf function of a global invader: a case of resource reallocation?

A knot of hybrids: Differentiating Asian knotweeds in North‐Eastern France using genetic, cytological, and morphological data

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