Phylogenetic positions of Actites megalocarpa and Sonchus hydrophilus (Sonchinae: Asteraceae) based on ITS and chloroplast non-coding DNA sequences

2004 ◽  
Vol 17 (1) ◽  
pp. 73 ◽  
Author(s):  
Seung-Chul Kim ◽  
Christina T. Lu ◽  
Brendan J. Lepschi
Keyword(s):  
New Zealand ◽  
Chloroplast Dna ◽  
Dna Sequences ◽  
Intergenic Spacer ◽  
Its Sequences ◽  
Monotypic Genus ◽  
Nuclear Rdna

Phylogenetic positions of the Australian endemic taxa Actites megalocarpa and Sonchus hydrophilus within the subtribe Sonchinae were determined on the basis of ITS sequences of nuclear rDNA and the psbA–trnH(GUG) intergenic spacer of chloroplast DNA. Both ITS and cpDNA phylogenies suggest that the monotypic genus Actites is not closely related to the members of Sonchus section Asperi, as previously suggested. Rather, this study indicates that it is more closely related to the members of Sonchus sections Maritimi (S.�maritimus) and Arvenses (S. arvensis). It also suggests that S. maritimus from section Maritimi is one of the closest relatives of Actites in Australia, although an alternative origin from section Arvenses is possible. Actites and Embergeria, once treated as congeneric taxa, appear to have originated independently in Australia and New Zealand, respectively. Sonchus hydrophilus is closely related to the S. asper complex, S. oleraceus and S. kirkii. This study suggests that S. kirkii may be involved in the origin of S. hydrophilus in Australia.

A review of the fern genus Pellaea (Pteridaceae) in Australasia

2020 ◽  
Author(s):  
Patrick J. Brownsey ◽  
Daniel J. Ohlsen ◽  
Lara D. Shepherd ◽  
Whitney L. M. Bouma ◽  
Erin L. May ◽  
...  
Keyword(s):  
New Zealand ◽  
Chloroplast Dna ◽  
Dna Sequences ◽  
Sequence Data ◽  
Indigenous Species ◽  
Ploidy Levels ◽  
Dna Sequence Data ◽  
Australian Species ◽  
The Status ◽  
Chloroplast Dna Sequences

Five indigenous species of Pellaea in Australasia belong to section Platyloma. Their taxonomic history is outlined, morphological, cytological and genetic evidence for their recognition reviewed, and new morphological and chloroplast DNA-sequence data provided. Australian plants of P. falcata (R.Br.) Fée are diploid and have longer, narrower pinnae than do New Zealand plants previously referred to P. falcata, which are tetraploid. Evidence indicates that P. falcata does not occur in New Zealand, and that collections so-named are P. rotundifolia (G.Forst.) Hook. Chloroplast DNA sequences are uninformative in distinguishing Australian P. falcata from New Zealand P. rotundifolia, but show that Australian P. nana is distinct from both. Sequence data also show that Australian and New Zealand populations of P. calidirupium Brownsey & Lovis are closely related, and that Australian P. paradoxa (R.Br.) Hook. is distinct from other Australian species. Although P. falcata is diploid and P. rotundifolia tetraploid, P. calidirupium, P. nana (Hook.) Bostock and P. paradoxa each contain multiple ploidy levels. Diploid populations of Pellaea species are confined to Australia, and only tetraploids are known in New Zealand. Evolution of the group probably involved hybridisation, autoploidy, alloploidy, and possibly apomixis. Further investigation is required to resolve the status of populations from Mount Maroon, Queensland and the Kermadec Islands.

scholarly journals Haplotypes of “Candidatus Liberibacter europaeus” also separate by geography and host species

2014 ◽  
Author(s):  
Warrick R Nelson
Keyword(s):  
New Zealand ◽  
Dna Sequences ◽  
Host Species ◽  
Biocontrol Agent ◽  
Intergenic Spacer ◽  
Intergenic Spacer Region ◽  
Scotch Broom ◽  
Candidatus Liberibacter ◽  
Pear Trees ◽  
Historical Accounts

“Candidatus Liberibacter europaeus” (Leu) is one of six currently known Liberibacter species. It is known primarily from pear and related species across Europe, and from Scotch broom and its associated psyllids in New Zealand (introduced from Britain). The psyllids were introduced to New Zealand as a biocontrol agent for broom and it is thought the bacterium may have been introduced as an endosymbiont of the psyllids. No symptoms in apple or pear trees have been reported, but mild symptoms can occur in broom. 16S and 16S–23S intergenic spacer region DNA sequences of this species have been deposited in GenBank. Analysis of these sequences and associated ecological descriptions indicates the occurrence of two haplotypes, LeuA and LeuB, defined not only genetically but also by geographic range as well as by plant/psyllid host species composition. Liberibacter species are new to science and haplotype identifications enable historical accounts of relationships and spread to be generated.

scholarly journals Molecular-phylogenetic analysis of the Cystopteridaceae family from North Asia based on plastid DNA loci

2020 ◽  
Author(s):  
D.O. Ulko ◽  
◽  
I.I. Gureyeva ◽  
R.S. Romanets ◽  
A.A. Kuznetsov ◽  
...  
Keyword(s):  
Phylogenetic Analysis ◽  
Chloroplast Dna ◽  
Intergenic Spacer ◽  
Plastid Dna ◽  
Monotypic Genus ◽  
Phylogenetic Studies ◽  
North Asia ◽  
Matk Gene ◽  
Molecular Phylogenetic ◽  
Gymnocarpium Dryopteris

The results of molecular phylogenetic studies based on the sequencing of matK gene and trnG-R intergenic spacer of the chloroplast DNA and analysis of the concatenated data of these loci of North Asian representatives of the Cystopteridaceae family are presented. In the genus Gymnocarpium, a dryopteris-clade was distinguished including species without glandular pubescence of fronds – Gymnocarpium dryopteris. Species having glandular pubescent fronds have formed the robertianum-clade (G. robertianum and G. fedtschenkoanum), and 2 subclades, including G. continentale, G. jessoense, and G. tenuipes. In the genus Cystopteris, the analysis confirmed the separation of C. montana from other Cystopteris species, and the separation of C. sudetica from the C. fragilis-complex. This advocate the recognition of monotypic genus Rhizomatopteris including Rh. montana (≡Cystopteris montana), and allows to recognize the section Khokhrjakovia (with C. sudetica) within the genus Cystopteris. This analysis did not allow to separate the species of the type subgenus Cystopteris (C. fragilis-complex) from each other.

scholarly journals Haplotypes of “Candidatus Liberibacter europaeus” also separate by geography and host species

2015 ◽  
Author(s):  
Warrick R Nelson
Keyword(s):  
New Zealand ◽  
Dna Sequences ◽  
Host Species ◽  
Biocontrol Agent ◽  
Intergenic Spacer ◽  
Intergenic Spacer Region ◽  
Scotch Broom ◽  
Candidatus Liberibacter ◽  
Pear Trees ◽  
Historical Accounts

“Candidatus Liberibacter europaeus” (Leu) is one of six currently known Liberibacter species. It is known primarily from pear and related species across Europe, and from Scotch broom and its associated psyllids in New Zealand (introduced from Britain). The psyllids were introduced to New Zealand as a biocontrol agent for broom and it is thought the bacterium may have been introduced as an endosymbiont of the psyllids. No symptoms in apple or pear trees have been reported, but mild symptoms can occur in broom. 16S and 16S–23S intergenic spacer region DNA sequences of this species are available from GenBank. Analysis of these sequences and associated ecological descriptions indicates the occurrence of two haplotypes, LeuA and LeuB, defined not only genetically but also by geographic range as well as by plant/psyllid host species composition. Liberibacter species are new to science and haplotype identifications enable historical accounts of relationships and spread to be generated.

scholarly journals Chloroplast Dna Sequences Confirmed Genetic Divergence Within Calypogeia Muelleriana (Calypogeiaceae, Marchantiophyta)

2013 ◽  
Vol 32 (1) ◽  
pp. 1-8 ◽  
Author(s):  
Katarzyna Buczkowska ◽  
Patrycja Gonera ◽  
Alina Bączkiewicz ◽  
Stanisław Rosadziński ◽  
Mariola Rabska
Keyword(s):  
United Kingdom ◽  
North America ◽  
Chloroplast Dna ◽  
Chloroplast Genome ◽  
Dna Sequences ◽  
Genetic Divergence ◽  
Intergenic Spacer ◽  
Reference Species ◽  
Isozyme Markers ◽  
Chloroplast Dna Sequences

Abstract Nine species of the genus Calypogeia Raddi are currently known from Europe: C. azurea, C. integristipula, C. neesiana,C. suecica, C. muelleriana, C. sphagnicola, C. fissa, C. arguta, and C. azorica. Recently, another species, morphologically resembling C. muelleriana but genetically distinct from it, was detected using isozyme markers. In the present study, relationships between the newly detected species (C. sp. nov.) and typical C. muelleriana were analyzed using the DNA sequencesdata of three regions from the chloroplast genome: introns of trnG and trnL genes and intergenic spacer trnH-psbA. Calypogeia sp. nov. differs from C. muelleriana s. str. (typical form) in all examined chloroplast regions. It differs as well from C. azurea, which was used as a reference species. The number of fixed nucleotide differences between C. muelleriana s. str. and C. sp. nov. is almost the same as between C. muelleriana s. str. and C. azurea. The results of the present study suggest a closer affinity of C. sp. nov. to C. azurea than to C. muelleriana s. str. in Europe, C. muelleriana s. str. was noted in Poland, Germany, Holland, United Kingdom and Azores. Samples determined as C. sp. nov., besides Poland, were so far detected also in North America

scholarly journals Haplotypes of “Candidatus Liberibacter europaeus” also separate by geography and host species

2015 ◽  
Author(s):  
Warrick R Nelson
Keyword(s):  
New Zealand ◽  
Dna Sequences ◽  
Host Species ◽  
Biocontrol Agent ◽  
Intergenic Spacer ◽  
Intergenic Spacer Region ◽  
Scotch Broom ◽  
Candidatus Liberibacter ◽  
Pear Trees ◽  
Historical Accounts

“Candidatus Liberibacter europaeus” (Leu) is one of six currently known Liberibacter species. It is known primarily from pear and related species across Europe, and from Scotch broom and its associated psyllids in New Zealand (introduced from Britain). The psyllids were introduced to New Zealand as a biocontrol agent for broom and it is thought the bacterium may have been introduced as an endosymbiont of the psyllids. No symptoms in apple or pear trees have been reported, but mild symptoms can occur in broom. 16S and 16S–23S intergenic spacer region DNA sequences of this species are available from GenBank. Analysis of these sequences and associated ecological descriptions indicates the occurrence of two haplotypes, LeuA and LeuB, defined not only genetically but also by geographic range as well as by plant/psyllid host species composition. Liberibacter species are new to science and haplotype identifications enable historical accounts of relationships and spread to be generated.

Reinstatement of Loxogramme dictyopteris, based on phylogenetic evidence, for the New Zealand endemic fern, Anarthropteris lanceolata (Polypodiaceae, Polypodiidae)

2006 ◽  
Vol 19 (4) ◽  
pp. 309 ◽  
Author(s):  
Hans-Peter Kreier ◽  
Harald Schneider
Keyword(s):  
New Zealand ◽  
Chloroplast Genome ◽  
Dna Sequences ◽  
Phylogenetic Relationships ◽  
Morphological Evidence ◽  
Monotypic Genus

Phylogenetic relationships of the New Zealand endemic Anarthropteris lanceolata are inferred from DNA sequences of four chloroplast genome regions, rbcL, rps4, rps4–trnS IGS, and trnL–F IGS. In addition to a broad collection of polygrammoid ferns, the sampling includes two species of the genus Dictymia, five species of the genus Loxogramme, and one sample of the monotypic genus Anarthropteris. The latter is found to be nested within Loxogramme, and we reinstate it here as Loxogramme dictyopteris, to replace Anarthropteris lanceolata. These findings are not in conflict with morphological evidence. Phylogenetic evidence implies an isolation of L. dictyopteris from its closest relatives in Malesia. The five other species of Loxogramme included in this study fall either into an Asiatic-Malesian clade or in an Afro-Madagascan-Neotropical clade.

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