Contributions to a chromosome atlas of the New Zealand flora — 36. Miscellaneous families

Section: Generalmentioning

confidence: 99%

“…So far chromosome counts have not been of much use as a taxonomic tool. The most usual number known for Pimelea in New Zealand is 2n = 36 (Dawson & Beuzenberg 2000). This number (or n = 18) has been obtained for P. prostrata subspp.…”

Section: Generalmentioning

confidence: 99%

GenusPimelea(Thymelaeaceae) in New Zealand 2. The endemicPimelea prostrataandPimelea urvillianaspecies complexes

Burrows

2009

“…There are two chromosome races in Hebe odora that Druce (1980Druce ( , 1993 and Eagle (1982) (Dawson & Beuzenberg 2000). We have found no consistent morphological differences between the two chromosome races, and continue to treat them as conspecific.…”

Section: Variation In Hebe Odoramentioning

confidence: 66%

“…The group of samples from North Island and northern South Island with similar flavonoid profiles (Fig. 3;MJB 461,460, 875, 1381MJB 461,460, 875, , 1501MJB 461,460, 875, , 1621 are from areas, given the distribution of known cytotypes (Dawson & Beuzenberg 2000), that are occupied by diploid plants. The other northern South Island sample (MJB 783), from Lake Tennyson, which has a distinctive flavonoid profile, is from the region (between Island Pass, Nelson, and Jacks Pass, north Canterbury) where the two cytotypes potentially overlap in distribution, and it could, therefore, be either diploid or tetraploid.…”

Section: Variation In Hebe Odoramentioning

confidence: 87%

Composition and taxonomic distribution of leaf flavonoids inHebeandLeonohebe(Plantaginaceae) in New Zealand — 1. “Buxifoliatae”, “Flagriformes”, andLeonohebe

Markham¹,

Mitchell²,

Bayly

et al. 2005

A taxonomic revision of Hebe and Leonohebe in New Zealand has involved studies of both plant morphology and flavonoid chemistry. This paper is the first in a series that summarises the composition and taxonomic distribution of leaf flavonoids in the two genera. It describes the flavonoid glycosides encountered in a survey of c. 700 samples (from throughout the two genera), and outlines the distribution of flavonoids in species of "Buxifoliatae" and "Flagriformes" (informal infrageneric groups of Hebe) and in Leonohebe. The structures of 83 of the most commonly occurring flavonoids are identified (or tentatively identified); also recorded are 32 unidentified or partly identified flavonoids that are generally less common. Twenty-eight of the flavonoid glycosides have not previously been reported in other plant genera. Most species, in each of "Buxifoliatae", "Flagriformes", and Leonohebe, can be distinguished by their flavonoid profiles, generally through possession of unique combinations of compounds.

“…Diploids and polyploids commonly show different distribution patterns (Stebbins 1971;Thompson & Lumaret 1992) although there are many examples, including at least a couple in New Zealand (Hebe diosmifolia, H. odora), where this is not the case (Murray 1976;Sieber & Murray 1980;Murray et al 1989;Dawson & Beuzenberg 2000). Although P. angulata is morphologically a very variable species showing considerable variation in the size of leaves, flowers and fruit (E. K. Cameron unpubl.…”

Section: Discussionmentioning

confidence: 99%

Polyploidy, hybridization and evolution inPratia(Campanulaceae)

Murray¹,

Datson²,

Lai³

et al. 2004

Evolution in the genus Pratia (Campanulaceae) has been studied using a variety of techniques. The distribution of chromosome races in P. angulata has been plotted and results suggest that although they generally occupy different geographic areas there are large areas of overlap. No consistent morphological differences were found between these chromosome races. The existence of hybrids between P. angulata and P. perpusilla with 1 1x and 13x chromosome numbers has been established using genomic in situ hybridization (GISH), and random amplified polymorphic DNA (RAPD) analysis suggests several independent origins for these hybrids. Artificial hybridization studies showed a high degree of compatibility in almost all the combinations that were attempted. DNA sequences derived from both the nuclear genome (internal transcribed spacer of the rDNA locus, ITS) and chloroplast genomes (trnL intron and trnL-trnF spacer) were used to construct phylogenies. Colensoaphysaloides has been shown to be distinct from the New Zealand species of Pratia and was used as an outgroup to root the phylogenetic trees. A significant finding is that P. macrodon is sister to the other New Zealand species. DNA B04008; Online publication date 9 December 2004 Received 18 March 2004; accepted 14 June 2004sequence data also confirm the hybrid origin of the 1 1x and 13x plants and show that P. perpusilla is the maternal parent of the 1 1x plants and P. angulata is the maternal parent of the 13x ones. The origin of the putative hybrid plants with the12x chromosome number remains to be elucidated.