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Comparison of genetic (co)variance matrices within and between Scabiosa canescens and S-columbaria

Waldmann, P and Andersson, Stefan LU (2000) In Journal of Evolutionary Biology 13(5). p.826-835
Abstract
In the current study, we used bootstrap analyses and the common principal component (CPC) method of Flury (1988) to estimate and compare the G-matrix of Scabiosa columbaria and S. canescens populations. We found three major patterns in the G-matrices: (i) the magnitude of the (co)variances was more variable among characters than among populations, (ii) different populations showed high (co)variance for different characters, and (iii) there was a tendency for S. canescens to have higher genetic (co)variances than S. columbaria. The hypothesis of equal G-matrices was rejected in all comparisons and there was no evidence that the matrices differed by a proportional constant in any of the analyses. The two 'species matrices' were found to be... (More)
In the current study, we used bootstrap analyses and the common principal component (CPC) method of Flury (1988) to estimate and compare the G-matrix of Scabiosa columbaria and S. canescens populations. We found three major patterns in the G-matrices: (i) the magnitude of the (co)variances was more variable among characters than among populations, (ii) different populations showed high (co)variance for different characters, and (iii) there was a tendency for S. canescens to have higher genetic (co)variances than S. columbaria. The hypothesis of equal G-matrices was rejected in all comparisons and there was no evidence that the matrices differed by a proportional constant in any of the analyses. The two 'species matrices' were found to be unrelated, both for raw data and data standardized over populations, and there was significant between-population variation in the G-matrix in both species. Populations of S. canescens showed conservation of structure (principal components) in their G-matrices, contrasting with the lack of common structure among the S. columbaria matrices. Given these observations and the results from previous studies, we propose that selection may be responsible for some of the variation between the G-matrices, at least in S. columbaria and at the between-species level. (Less)
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author
organization
publishing date
type
Contribution to journal
publication status
published
subject
in
Journal of Evolutionary Biology
volume
13
issue
5
pages
826 - 835
publisher
John Wiley & Sons
external identifiers
  • scopus:0033800138
ISSN
1420-9101
DOI
10.1046/j.1420-9101.2000.00214.x
language
English
LU publication?
yes
id
fd8e8af7-ed6f-4ad1-9f41-ffbcda9589a7 (old id 147322)
date added to LUP
2007-07-23 13:37:11
date last changed
2017-01-01 04:30:53
@article{fd8e8af7-ed6f-4ad1-9f41-ffbcda9589a7,
  abstract     = {In the current study, we used bootstrap analyses and the common principal component (CPC) method of Flury (1988) to estimate and compare the G-matrix of Scabiosa columbaria and S. canescens populations. We found three major patterns in the G-matrices: (i) the magnitude of the (co)variances was more variable among characters than among populations, (ii) different populations showed high (co)variance for different characters, and (iii) there was a tendency for S. canescens to have higher genetic (co)variances than S. columbaria. The hypothesis of equal G-matrices was rejected in all comparisons and there was no evidence that the matrices differed by a proportional constant in any of the analyses. The two 'species matrices' were found to be unrelated, both for raw data and data standardized over populations, and there was significant between-population variation in the G-matrix in both species. Populations of S. canescens showed conservation of structure (principal components) in their G-matrices, contrasting with the lack of common structure among the S. columbaria matrices. Given these observations and the results from previous studies, we propose that selection may be responsible for some of the variation between the G-matrices, at least in S. columbaria and at the between-species level.},
  author       = {Waldmann, P and Andersson, Stefan},
  issn         = {1420-9101},
  language     = {eng},
  number       = {5},
  pages        = {826--835},
  publisher    = {John Wiley & Sons},
  series       = {Journal of Evolutionary Biology},
  title        = {Comparison of genetic (co)variance matrices within and between Scabiosa canescens and S-columbaria},
  url          = {http://dx.doi.org/10.1046/j.1420-9101.2000.00214.x},
  volume       = {13},
  year         = {2000},
}