ALBERT

All Library Books, journals and Electronic Records Telegrafenberg

X
feed icon rss

Your email was sent successfully. Check your inbox.

An error occurred while sending the email. Please try again.

Proceed reservation?

Export
Filter
  • Euryptera group  (1)
  • Flora of Scandinavia  (1)
  • 1
    Electronic Resource
    Electronic Resource
    Electrophoretic relationships and phylogeny of Nordic polyploids inDraba (Brassicaceae) (1992)
    Springer
    Plant systematics and evolution 182 (1992), S. 35-70 
    Details
    ISSN: 1615-6110
    Keywords: Brassicaceae ; Draba ; Draba alpina complex ; Draba crassifolia ; Enzyme electrophoresis ; allopolyploidy ; fixed heterozygosity ; inbreeding ; multiple origins ; polyphyly ; phylogeny ; phytogeography ; Flora of Scandinavia ; Svalbard
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract 104 populations of 15 Nordic species (2x–16x) of the taxonomically complex genusDraba were investigated using enzyme electrophoresis. The polyploids were genetic alloploids showing high levels of fixed heterozygosity and electrophoretic variation; the diploids were homozygous and genetically depauperate. Thus, the data suggest that alloploidy in arctic-alpineDraba serves as an escape from genetic depauperation caused by inbreeding at the diploid level. Although some populations probably have local alloploid origins, electrophoretic data indicate that several polyploids have migrated repeatedly into the Nordic area.Draba crassifolia (2n = 40) is probably octoploid based on x = 5. A hypothesis on the evolutionary history of the polyploids based on x = 8 is presented. Diploids contributing to numerous polyploid genomes and multiple origins of polyploids have seriously blurred taxonomic relationships. Relationships inferred from genetic data do not always correspond to those based on morphology; two morphologically very similar polyploids,D. alpina andD. oxycarpa, were, for example, genetically distant and probably represent independent lineages.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00941414
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 2
    Electronic Resource
    Electronic Resource
    An ITS-based phylogenetic analysis of theEuryptera species group inLomatium (Apiaceae) (1999)
    Springer
    Plant systematics and evolution 219 (1999), S. 65-78 
    Details
    ISSN: 1615-6110
    Keywords: Apiaceae ; Lomatium ; Euryptera group ; ITS sequences ; molecular systematics ; phylogenetic analysis ; parsimony ; maximum likelihood
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract Lomatium, the largest genus of Apiaceae in western North America, includes many narrow endemics whose relationships are uncertain. Although no infrageneric classification exists forLomatium, several informal groups have been recognized. TheEuryptera group comprises seven narrowly endemic species distributed primarily in California. We conducted parsimony and maximum likelihood (ML) analyses using sequences of the internal transcribed spacers (ITS) of the nuclear ribosomal DNA from species of theEuryptera group and several other species ofLomatium. When considered with distribution, morphological, and cpDNA data, the ITS analyses are consistent with the monophyly of theEuryptera group and suggests that speciation in this group has occurred through geographical divergence. Inferences from ITS data also identify putative progenitors of the polyploidEuryptera species.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01090300
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
Close ⊗
This website uses cookies and the analysis tool Matomo. More information can be found here...