Morphometric and molecular variation in the Nordic dogroses (Rosa Sect. Caninae, Rosaceae)
(1999)- Abstract
- In the present thesis, I investigate the hierarchical structure of morphometric and molecular diversity within and between the Nordic dogroses (Rosa Sect. Caninae, Rosaceae). I also investigate patterns of geographic differentiation and taxonomic relationships within the group. The dogroses are characterized by a unique genetic system, the so-called ”canina meiosis” that leads to an uneven allocation of maternal and paternal chromosomes to the progeny and results in a largely matroclinal mode of inheritance. The partitioning of morphometric and molecular diversity in the investigated taxa was similar to that found in selfing or apomictic species. However, because of the matroclinal effects of the canina meiosis, the partitioning of... (More)
- In the present thesis, I investigate the hierarchical structure of morphometric and molecular diversity within and between the Nordic dogroses (Rosa Sect. Caninae, Rosaceae). I also investigate patterns of geographic differentiation and taxonomic relationships within the group. The dogroses are characterized by a unique genetic system, the so-called ”canina meiosis” that leads to an uneven allocation of maternal and paternal chromosomes to the progeny and results in a largely matroclinal mode of inheritance. The partitioning of morphometric and molecular diversity in the investigated taxa was similar to that found in selfing or apomictic species. However, because of the matroclinal effects of the canina meiosis, the partitioning of morphometric and molecular diversity within the dogrose taxa cannot be simply interpreted in terms of different levels of selfing or apomixis. Most of the investigated Sect. Caninae taxa show a somewhat mosaic pattern of geographic differentiation between populations in both leaflet shape and reproductive characters. Two of the taxa (R. dumalis subsp. dumalis and R. rubiginosa) show weak geographic differentiation in one of the character sets: R. dumalis subsp. dumalis in leaflet shape and R. rubiginosa in reproductive characters. The Nordic dogroses can be divided into three distinct groups: the R. canina group, the R. rubiginosa group and the R. villosa group, on the basis of morphology and RAPD marker variation. Neither morphometric or molecular data support the present delimitation of subspecies within R. dumalis and the variation within R. dumalis might be better described at a lower rank than that of subspecies. Morphometric data support the current taxonomic separation between R. villosa subsp. mollis and R. sherardii and the varietal subdivision of R. sherardii. (Less)
Please use this url to cite or link to this publication:
https://lup.lub.lu.se/record/39970
- author
- Olsson, Åsa LU
- supervisor
- opponent
-
- Prof Nordal, Inger, Oslo university
- organization
- publishing date
- 1999
- type
- Thesis
- publication status
- published
- subject
- keywords
- Systematisk botanik, chemotaxonomy. Physiology of nonvascular plants, Genetic diversity, Geographic differentiation, Systematic botany, RAPDs, taxonomy, morphology, phytogeography, kemotaxonomi. Växters fysiologi (inte kärlväxter)., taxonomi, morfologi
- pages
- 149 pages
- publisher
- Department of Systematic Botany, Östra Vallgatan 14-20, 223 61 Lund, Sweden
- defense location
- Ö. Vallgatan 14, Lund
- defense date
- 1999-11-19 10:15:00
- external identifiers
-
- other:ISRN: LUNBDS/(NBBS-1028)/1-149/1999
- ISBN
- 91-628-3842-3
- language
- English
- LU publication?
- yes
- additional info
- The information about affiliations in this record was updated in December 2015. The record was previously connected to the following departments: Department of Ecology (Closed 2011) (011006010)
- id
- 29eed288-03d9-4dd1-a9fb-14629a4cac41 (old id 39970)
- date added to LUP
- 2016-04-04 11:00:04
- date last changed
- 2018-11-21 21:02:02
@phdthesis{29eed288-03d9-4dd1-a9fb-14629a4cac41,
abstract = {{In the present thesis, I investigate the hierarchical structure of morphometric and molecular diversity within and between the Nordic dogroses (Rosa Sect. Caninae, Rosaceae). I also investigate patterns of geographic differentiation and taxonomic relationships within the group. The dogroses are characterized by a unique genetic system, the so-called ”canina meiosis” that leads to an uneven allocation of maternal and paternal chromosomes to the progeny and results in a largely matroclinal mode of inheritance. The partitioning of morphometric and molecular diversity in the investigated taxa was similar to that found in selfing or apomictic species. However, because of the matroclinal effects of the canina meiosis, the partitioning of morphometric and molecular diversity within the dogrose taxa cannot be simply interpreted in terms of different levels of selfing or apomixis. Most of the investigated Sect. Caninae taxa show a somewhat mosaic pattern of geographic differentiation between populations in both leaflet shape and reproductive characters. Two of the taxa (R. dumalis subsp. dumalis and R. rubiginosa) show weak geographic differentiation in one of the character sets: R. dumalis subsp. dumalis in leaflet shape and R. rubiginosa in reproductive characters. The Nordic dogroses can be divided into three distinct groups: the R. canina group, the R. rubiginosa group and the R. villosa group, on the basis of morphology and RAPD marker variation. Neither morphometric or molecular data support the present delimitation of subspecies within R. dumalis and the variation within R. dumalis might be better described at a lower rank than that of subspecies. Morphometric data support the current taxonomic separation between R. villosa subsp. mollis and R. sherardii and the varietal subdivision of R. sherardii.}},
author = {{Olsson, Åsa}},
isbn = {{91-628-3842-3}},
keywords = {{Systematisk botanik; chemotaxonomy. Physiology of nonvascular plants; Genetic diversity; Geographic differentiation; Systematic botany; RAPDs; taxonomy; morphology; phytogeography; kemotaxonomi. Växters fysiologi (inte kärlväxter).; taxonomi; morfologi}},
language = {{eng}},
publisher = {{Department of Systematic Botany, Östra Vallgatan 14-20, 223 61 Lund, Sweden}},
school = {{Lund University}},
title = {{Morphometric and molecular variation in the Nordic dogroses (Rosa Sect. Caninae, Rosaceae)}},
year = {{1999}},
}