Phylogenetic Implications of Ribosomal DNA Restriction Site Variation in the Plant Family Onagraceae

1990 ◽  
Vol 77 (3) ◽  
pp. 523 ◽  
Author(s):  
Jorge V. Crisci ◽  
Elizabeth A. Zimmer ◽  
Peter C. Hoch ◽  
George B. Johnson ◽  
Christy Mudd ◽  
...  
Keyword(s):  
Ribosomal Dna ◽  
Restriction Site ◽  
Plant Family ◽  
Restriction Site Variation ◽  
Phylogenetic Implications ◽  
Site Variation ◽  
Dna Restriction

Molecular phylogenetics of Thlaspi s.l. (Brassicaceae) based on chloroplast DNA restriction site variation and sequences of the internal transcribed spacers of nuclear ribosomal DNA

1997 ◽  
Vol 75 (3) ◽  
pp. 469-482 ◽  
Author(s):  
Klaus Mummenhoff ◽  
Andreas Franzke ◽  
Marcus Koch
Keyword(s):  
Chloroplast Dna ◽  
Ribosomal Dna ◽  
Restriction Site ◽  
Nuclear Ribosomal Dna ◽  
Hybrid Origin ◽  
Ploidy Levels ◽  
Restriction Site Variation ◽  
Its Regions ◽  
Site Variation ◽  
Dna Restriction

Systematics of the genus Thlaspi s.l. is difficult and controversial. Previous hypotheses have been based on morphological and anatomical data. We have analyzed sequence variation of the internal transcribed spacer (ITS) regions of nuclear ribosomal DNA (nrDNA) among 13 Thlaspi s.l. taxa, representing all sections of the genus. Phylogenetic relationships among ITS sequences of the Thlaspi s.l. taxa studied are in general concordance with a previously published chloroplast DNA based phylogeny of this group. Most-parsimonious trees from ITS and chloroplast DNA data support three groups that are congruent with lineages (Thlaspi s.str., Noccaea–Raparia, Microthlaspi) previously described by Meyer on the basis of seed anatomy. The ITS data grouped Microthlaspi granatense outside the Microthlaspi clade and, therefore, Microthlaspi appeared paraphyletic on the ITS tree, in contrast with the chloroplast DNA phylogeny. We speculate that concerted evolutionary forces have acted among different nrDNA arrays (brought together in M. granatense by hybridization with a related taxon), resulting in the fixation of the alien species nrDNA type in M. granatense, which, however, maintains a Microthlaspi chloroplast genome type. Both molecular data sets detected intraspecific variation among Microthlaspi perfoliatum accessions of different geographic origin and different ploidy levels. Our molecular evidence would suggest the hybrid origin of polyploid M. perfoliatum from diploid M. perfoliatum and M. natolicum. Key words: chloroplast DNA, restriction site variation, sequence analysis of nuclear ribosomal DNA ITS regions, Thlaspi s.l. (Brassicaceae), molecular phylogeny, congruence.

Phylogenetic implications of chloroplast DNA restriction site variation in subtribes Raphaninae and Cakilinae (Brassicaceae, tribe Brassiceae)

1997 ◽  
Vol 75 (6) ◽  
pp. 960-973 ◽  
Author(s):  
S. I. Warwick ◽  
L. D. Black
Keyword(s):  
Chloroplast Dna ◽  
Restriction Site ◽  
Cladistic Analysis ◽  
Raphanus Raphanistrum ◽  
Restriction Site Variation ◽  
Phylogenetic Implications ◽  
Site Variation ◽  
Subtribe Brassicinae ◽  
Dna Restriction ◽  
Rapistrum Rugosum

Chloroplast DNA restriction site data was used to assess relationships among 41 taxa of the subtribes Raphaninae and Cakilinae (tribe Brassiceae, Brassicaceae). A total of 456 restriction site mutations was observed, with 237 (52%) being phylogenetically informative. Cladistic analysis, based on Wagner parsimony analysis, indicated four major clades: (i) CAKILE, (ii) CRAMBE, (iii) NIGRA lineage, and (iv) RAPA-OLERACEA lineage. The CAKILE clade was divided into two lineages: (i) Cakile, Erucaria (including Reboudia), and Didesmus (previously assigned by Schulz to the Raphaninae) and (ii) Crambella (previously assigned by Schulz to the Raphaninae). The Raphaninae as currently circumscribed is polyphyletic in origin. The cpDNA data supported separate subtribal status for Crambe (Raphaninae) and indicated two major lineages corresponding to sect. Dendrocrambe and the combined sections Crambe and Leptocrambe. Enarthrocarpus arcuatus, Enarthrocarpus lyratus, Morisia monanthos, Raphanus raphanistrum, Raphanus sativus, and Rapistrum perenne were included in the RAPA-OLERACEA lineage of subtribe Brassicinae. Ceratocnemum rapistroides, Cordylocarpus muricatus, Guiraoa arvensis, Hemicrambe fruticulosa, Kremeriella cordylocarpus, Muricaria prostrata, Otocarpus virgatus, Raffenaldia primuloides, and Rapistrum rugosum were included in the NIGRA lineage of subtribe Brassicinae. Key words: Brassicinae, Raphaninae, Cakilinae, chloroplast DNA restriction site variation, molecular systematics.

Chloroplast DNA restriction site variation and phylogeny of the Berberidaceae

1998 ◽  
Vol 85 (12) ◽  
pp. 1766-1778 ◽  
Author(s):  
Young-Dong Kim ◽  
Robert K. Jansen
Keyword(s):  
Chloroplast Dna ◽  
Restriction Site ◽  
Restriction Site Variation ◽  
Site Variation ◽  
Dna Restriction

Implications of Chloroplast DNA Restriction Site Variation for Systematics of Acacia (Fabaceae: Mimosoideae)

2000 ◽  
Vol 25 (4) ◽  
pp. 618 ◽  
Author(s):  
H. David Clarke ◽  
Stephen R. Downie ◽  
David S. Seigler
Keyword(s):  
Chloroplast Dna ◽  
Restriction Site ◽  
Restriction Site Variation ◽  
Site Variation ◽  
Dna Restriction
Sign in / Sign up

Export Citation Format

Share Document