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Morphometric diversity and geographic differentiation in six dogrose taxa (Rosa Sect. Caninae, Rosaceae) from the Nordic countries

Olsson, A and Prentice, Honor C LU (2001) In Nordic Journal of Botany 21(3). p.225-241
Abstract
The dogroses (Rosa Sect. Caninae) are characterized by a unique meiosis - the canina meiosis - that results in restricted recombination. In the present study, we investigate population differentiation and morphometric diversity within six taxa, of Nordic dogroses, with the help of automated image analysis of leaflet shape and manually-measured reproductive characters. The total morphometric diversity in each character type was partitioned into its hierarchical components. The within-taxon structure of diversity in leaflet shape is similar (in both rank and magnitude) to the within-taxon structure of reproductive character diversity in all the taxa, with the between-population component of diversity accounting for the majority of the total... (More)
The dogroses (Rosa Sect. Caninae) are characterized by a unique meiosis - the canina meiosis - that results in restricted recombination. In the present study, we investigate population differentiation and morphometric diversity within six taxa, of Nordic dogroses, with the help of automated image analysis of leaflet shape and manually-measured reproductive characters. The total morphometric diversity in each character type was partitioned into its hierarchical components. The within-taxon structure of diversity in leaflet shape is similar (in both rank and magnitude) to the within-taxon structure of reproductive character diversity in all the taxa, with the between-population component of diversity accounting for the majority of the total diversity. The within-taxon structuring of diversity in the dogroses is comparable to that found in selfers and in species characterized by restricted recombination (such as permanent translocation heterozygotes). The relatively high within- and between-family components of diversity in R. dumalis subsp. dumalis may be a reflection of a heterogeneous genome and/or of a higher degree of outcrossing than in the other dogrose taxa. Rosa rubiginosa is characterized by low overall levels of intraspecific variation. There is weak geographic differentiation between populations of R. dumalis subsp. dumalis (in leaflet shape) and R. rubiginosa (in reproductive characters). The study provides no support for the division of R. dumalis into subsp. dumalis and subsp. coriifolia but, in contrast, shows a clear separation between varieties umbelliflora and venusta within R. sherardii. (Less)
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author
organization
publishing date
type
Contribution to journal
publication status
published
subject
in
Nordic Journal of Botany
volume
21
issue
3
pages
225 - 241
publisher
Board of the Nordic Journal of Botany
external identifiers
  • scopus:0035696570
ISSN
0107-055X
language
English
LU publication?
yes
id
85955e3b-3967-4714-a436-eaa83bad21f9 (old id 147213)
date added to LUP
2007-07-02 12:58:21
date last changed
2018-01-07 05:32:33
@article{85955e3b-3967-4714-a436-eaa83bad21f9,
  abstract     = {The dogroses (Rosa Sect. Caninae) are characterized by a unique meiosis - the canina meiosis - that results in restricted recombination. In the present study, we investigate population differentiation and morphometric diversity within six taxa, of Nordic dogroses, with the help of automated image analysis of leaflet shape and manually-measured reproductive characters. The total morphometric diversity in each character type was partitioned into its hierarchical components. The within-taxon structure of diversity in leaflet shape is similar (in both rank and magnitude) to the within-taxon structure of reproductive character diversity in all the taxa, with the between-population component of diversity accounting for the majority of the total diversity. The within-taxon structuring of diversity in the dogroses is comparable to that found in selfers and in species characterized by restricted recombination (such as permanent translocation heterozygotes). The relatively high within- and between-family components of diversity in R. dumalis subsp. dumalis may be a reflection of a heterogeneous genome and/or of a higher degree of outcrossing than in the other dogrose taxa. Rosa rubiginosa is characterized by low overall levels of intraspecific variation. There is weak geographic differentiation between populations of R. dumalis subsp. dumalis (in leaflet shape) and R. rubiginosa (in reproductive characters). The study provides no support for the division of R. dumalis into subsp. dumalis and subsp. coriifolia but, in contrast, shows a clear separation between varieties umbelliflora and venusta within R. sherardii.},
  author       = {Olsson, A and Prentice, Honor C},
  issn         = {0107-055X},
  language     = {eng},
  number       = {3},
  pages        = {225--241},
  publisher    = {Board of the Nordic Journal of Botany},
  series       = {Nordic Journal of Botany},
  title        = {Morphometric diversity and geographic differentiation in six dogrose taxa (Rosa Sect. Caninae, Rosaceae) from the Nordic countries},
  volume       = {21},
  year         = {2001},
}