Additive and non-additive genetic architecture of two different-sized populations of Scabiosa canescens
(2001) In Heredity 86(6). p.648-657- Abstract
- Future adaptation to changes in the environment depends on the existence of additive genetic variances within populations. Recently, considerable attention has also been given to the non-additive component, which plays an important role in inbreeding depression and bottleneck situations. In this study, I used data from a North Carolina II crossing experiment, analysed with restricted maximum-likelihood methods, to estimate the additive and dominance genetic (co)variances for eight quantitative characters in two different-sized populations of Scabiosa canescens, a rare and threatened plant in Sweden. There was no evidence for genetic erosion in the small Hallestad population (approximate to 25 individuals) relative to the large Ahus... (More)
- Future adaptation to changes in the environment depends on the existence of additive genetic variances within populations. Recently, considerable attention has also been given to the non-additive component, which plays an important role in inbreeding depression and bottleneck situations. In this study, I used data from a North Carolina II crossing experiment, analysed with restricted maximum-likelihood methods, to estimate the additive and dominance genetic (co)variances for eight quantitative characters in two different-sized populations of Scabiosa canescens, a rare and threatened plant in Sweden. There was no evidence for genetic erosion in the small Hallestad population (approximate to 25 individuals) relative to the large Ahus population (approximate to 5000 individuals). In fact, slightly higher heritabilities were found in the Hallestad population. The additive genetic variance was statistically significant for all traits in both populations, but only a few additive covariances reached significance. The Hallestad population also had higher mean levels and more traits with significant dominance variance than the Ahus population. The variance attributable to maternal effects was too low to be considered significant. There was only a weak correspondence between heritabilities for each trait in the present study and previous estimates based on open-pollinated families of the same populations, but the mean heritability (over characters) was consistent between the studies. (Less)
Please use this url to cite or link to this publication:
https://lup.lub.lu.se/record/152979
- author
- Waldmann, P
- publishing date
- 2001
- type
- Contribution to journal
- publication status
- published
- subject
- in
- Heredity
- volume
- 86
- issue
- 6
- pages
- 648 - 657
- publisher
- Macmillan
- external identifiers
-
- scopus:0034810543
- ISSN
- 1365-2540
- language
- English
- LU publication?
- no
- additional info
- The information about affiliations in this record was updated in December 2015. The record was previously connected to the following departments: Plant Ecology and Systematics (Closed 2011) (011004000)
- id
- a5e586de-e763-4688-9bfb-652c6db5f3fe (old id 152979)
- alternative location
- http://www.nature.com/hdy/journal/v86/n6/full/6888730a.html
- date added to LUP
- 2016-04-01 12:07:45
- date last changed
- 2022-01-26 23:14:03
@article{a5e586de-e763-4688-9bfb-652c6db5f3fe,
abstract = {{Future adaptation to changes in the environment depends on the existence of additive genetic variances within populations. Recently, considerable attention has also been given to the non-additive component, which plays an important role in inbreeding depression and bottleneck situations. In this study, I used data from a North Carolina II crossing experiment, analysed with restricted maximum-likelihood methods, to estimate the additive and dominance genetic (co)variances for eight quantitative characters in two different-sized populations of Scabiosa canescens, a rare and threatened plant in Sweden. There was no evidence for genetic erosion in the small Hallestad population (approximate to 25 individuals) relative to the large Ahus population (approximate to 5000 individuals). In fact, slightly higher heritabilities were found in the Hallestad population. The additive genetic variance was statistically significant for all traits in both populations, but only a few additive covariances reached significance. The Hallestad population also had higher mean levels and more traits with significant dominance variance than the Ahus population. The variance attributable to maternal effects was too low to be considered significant. There was only a weak correspondence between heritabilities for each trait in the present study and previous estimates based on open-pollinated families of the same populations, but the mean heritability (over characters) was consistent between the studies.}},
author = {{Waldmann, P}},
issn = {{1365-2540}},
language = {{eng}},
number = {{6}},
pages = {{648--657}},
publisher = {{Macmillan}},
series = {{Heredity}},
title = {{Additive and non-additive genetic architecture of two different-sized populations of Scabiosa canescens}},
url = {{http://www.nature.com/hdy/journal/v86/n6/full/6888730a.html}},
volume = {{86}},
year = {{2001}},
}