Notes systématiques et écologiques sur les Spartines du Sud-Ouest

Jovet, Paul

doi:10.1080/00378941.1941.10834218

Cited by 9 publications

(3 citation statements)

References 0 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…In England, hybridization recorded in 1870 gave rise to S. 9 townsendii, a perennial sterile hybrid (Groves and Groves 1880). Another sterile hybrid between S. alterniflora and S. maritima was discovered in 1892 in southwest-France in the Bidassoa estuary (Foucaud 1897), and named Spartina 9 neyrautii (Jovet 1941). According to their different morphology, some authors suggested that S. 9 neyrautii and S. 9 townsendii might result from reciprocal crosses; however, molecular data revealed that both hybrids share the same chloroplast genome of S. alterniflora that was then the maternal parent to both hybrids (Baumel et al 2003).…”

Section: Spartina: a History Of Recurrent Hybridization And Polyploidmentioning

confidence: 93%

Hybridization, polyploidy and invasion: lessons from Spartina (Poaceae)

et al. 2008

View full text Add to dashboard Cite

In this paper, we examine how the Spartina system has helped our understanding of the genomic aspects of allopolyploid speciation in the context of biological invasion. More specifically the respective roles of hybridization and genome duplication in the success of newly formed allopolyploid species are explored. Hybridization appears to have triggered genetic and epigenetic changes in the two recently formed European homoploid hybrids S. 9 towsendii and S. 9 neyrautii. Deviation from parental structural additivity is observed in both hybrids, with different patterns when considering transposable element insertions or AFLP and methylation alteration. No important changes are observed in the invasive allopolyploid Spartina anglica that inherited the identical genome to S. 9 townsendii. The repeated rRNA genes are not homogenized in the allopolyploid, and both parental repeats are expressed in the populations examined. Transcriptomic changes suggest possible gene silencing in both hybrids and allopolyploid. In the long-term of evolutionary time, older hexaploid Spartina species (Spartina alterniflora, Spartina maritima and Spartina foliosa) appear to have selectively retained differential homeologous copies of nuclear genes. Waxy gene genealogies suggest a hybrid (allopolyploid) origin of this hexaploid lineage of Spartina. Finally, nuclear and chloroplast DNA data indicate a reticulate origin (alloheptaploid) of the invasive Spartina densiflora. All together these studies stress hybridization as a primary stimulus in the invasive success of polyploid Spartina species.

show abstract

Section: Spartina: a History Of Recurrent Hybridization And Polyploidmentioning

confidence: 93%

Hybridization, polyploidy and invasion: lessons from Spartina (Poaceae)

et al. 2008

View full text Add to dashboard Cite

show abstract

“…I n France the history of colonization starts later, the first records being about 1894 (Foucaud), and1906 (CorbiBre, 1925) in the mouth of the Vire. From then on the spread of the grass was as rapid as in Britain (Corbikre & Chevalier, 1922;Chevalier, 1923Chevalier, , 1933Potier de la Varde, 1934;Senay, 1934Senay, , 1939Potier de la Varde & Senay, 1939;Jovet, 1941;Jacquet, 1949).…”

Section: J and K T W Tmentioning

confidence: 99%

Evolution in Spartina (Gramineae): I. The history and morphology of the genus in Britain

Marchant

1967

Journal of the Linnean Society of London, Botany

View full text Add to dashboard Cite

SUMMARY The history of the genus Spartina in Britain is traced from herbarium records and publications. This historical information and a morphological study of living plants strengthen the view that sterile S. x townsendii arose in c. 1870 in Southampton Water as a hybrid between native S. maritimu and introduced American S. alterngora. The fertile Amphidiploid arose in 1890 and spread at the expense of the species populations. It is shown that species and hybrids of the S. x townsendii complex can be separated by a combination of only a few well‐defined morphological characters, and by stomata and pollen grain details. A polyhaploid seedling of low vigour among Amphidiploid progeny is described and its existence and resemblance to S. x townsendii F1 emphasizea the relationship between this PI hybrid and the Amphidiploid. Putative backcross hybrids of S. x townsendii Amphidi‐ ploid with X. alternijfora in Southampton Water provide conclusive evidence of S. x

show abstract

“…from southwestern France and northern Spain. Spartina neyrautii was initially considered to be a variant of Spartina maritima (e.g., Chevalier 1923, Saint-Yves 1932), but was later recognized as a morphologically and cytologically distinct hybrid, Spartina ×neyrautii ,with the same parentage as Spartina ×townsendii (e.g., Jovet 1941, Chevalier 1933, Marchant 1977). Baumel et al (2003) confirmed this with molecular data, demonstrating that Spartina ×neyrautii and Spartina ×townsendii originated independently by hybridization between the same maternal ( Spartina alterniflora ) and paternal ( Spartina maritima ) taxa.…”

Section: Taxonomymentioning

confidence: 99%

Taxonomic synopsis of invasive and native Spartina (Poaceae, Chloridoideae) in the Pacific Northwest (British Columbia, Washington and Oregon), including the first report of Spartina ×townsendii for British Columbia, Canada

Saarela¹

2012

PHYTOKEYS

View full text Add to dashboard Cite

Five species of the grass genus Spartina are invading salt marshes along the Pacific coast of North America, of which three have been documented in British Columbia, Canada, in only the last decade. A taxonomic synopsis of the two native (Spartina gracilis, Spartina pectinata) and five introduced Spartina taxa (Spartina anglica, Spartina alterniflora, Spartina densiflora, Spartina patens, Spartina ×townsendii) in the Pacific Northwest is presented to facilitate their identification, including nomenclature, a new taxonomic key, new descriptions for a subset of taxa, and representative specimens. Spartina ×townsendii is newly reported for the flora of British Columbia. The non-coastal species Spartina pectinata is reported from an urban site in British Columbia, the first confirmed report of the taxon for the province. Lectotypes are newly designated for Spartina anglica C.E. Hubb., Spartina maritima subvar. fallax St.-Yves, and Spartina cynosuroides f. major St.-Yves.

show abstract

Notes systématiques et écologiques sur les Spartines du Sud-Ouest

Cited by 9 publications

References 0 publications

Hybridization, polyploidy and invasion: lessons from Spartina (Poaceae)

Hybridization, polyploidy and invasion: lessons from Spartina (Poaceae)

Evolution in Spartina (Gramineae): I. The history and morphology of the genus in Britain

Taxonomic synopsis of invasive and native Spartina (Poaceae, Chloridoideae) in the Pacific Northwest (British Columbia, Washington and Oregon), including the first report of Spartina ×townsendii for British Columbia, Canada

Contact Info

Product

Resources

About