The Library
Evolved polygenic herbicide resistance in Lolium rigidum by low-dose herbicide selection within standing genetic variation
Tools
Tools
Tools
Busi, R. (Roberto), Neve, Paul and Powles, Stephen B. (2013) Evolved polygenic herbicide resistance in Lolium rigidum by low-dose herbicide selection within standing genetic variation. Evolutionary Applications, Volume 6 (Number 2). pp. 231-242. doi:10.1111/j.1752-4571.2012.00282.x ISSN 1752-4571.
|
Text
WRAP_Neve_eva282.pdf - Published Version Available under License Creative Commons Attribution Non-commercial. Download (670Kb) | Preview |
Official URL: http://dx.doi.org/10.1111/j.1752-4571.2012.00282.x
Abstract
The interaction between environment and genetic traits under selection is the basis of evolution. In this study, we have investigated the genetic basis of herbicide resistance in a highly characterized initially herbicide-susceptible Lolium rigidum population recurrently selected with low (below recommended label) doses of the herbicide diclofop-methyl. We report the variability in herbicide resistance levels observed in F1 families and the segregation of resistance observed in F2 and back-cross (BC) families. The selected herbicide resistance phenotypic trait(s) appear to be under complex polygenic control. The estimation of the effective minimum number of genes (NE), depending on the herbicide dose used, reveals at least three resistance genes had been enriched. A joint scaling test indicates that an additive-dominance model best explains gene interactions in parental, F1, F2 and BC families. The Mendelian study of six F2 and two BC segregating families confirmed involvement of more than one resistance gene. Cross-pollinated L. rigidum under selection at low herbicide dose can rapidly evolve polygenic broad-spectrum herbicide resistance by quantitative accumulation of additive genes of small effect. This can be minimized by using herbicides at the recommended dose which causes high mortality acting outside the normal range of phenotypic variation for herbicide susceptibility.
| Item Type: | Journal Article | ||||
|---|---|---|---|---|---|
| Subjects: | Q Science > QH Natural history > QH301 Biology Q Science > QH Natural history > QH426 Genetics Q Science > QK Botany |
||||
| Divisions: | Faculty of Science, Engineering and Medicine > Science > Life Sciences (2010- ) | ||||
| Library of Congress Subject Headings (LCSH): | Herbicide resistance, Plants -- Effect of herbicides on, Plant varieties, Plants -- Evolution, Plants -- Phylogeny, Ryegrasses | ||||
| Journal or Publication Title: | Evolutionary Applications | ||||
| Publisher: | Blackwell Publishing | ||||
| ISSN: | 1752-4571 | ||||
| Official Date: | February 2013 | ||||
| Dates: |
|
||||
| Volume: | Volume 6 | ||||
| Number: | Number 2 | ||||
| Page Range: | pp. 231-242 | ||||
| DOI: | 10.1111/j.1752-4571.2012.00282.x | ||||
| Status: | Peer Reviewed | ||||
| Publication Status: | Published | ||||
| Access rights to Published version: | Open Access (Creative Commons) | ||||
| Date of first compliant deposit: | 24 December 2015 | ||||
| Date of first compliant Open Access: | 24 December 2015 | ||||
| Funder: | Grains Research and Development Corporation (GRDC), Rural Industries Research and Development Corporation (RIRDC) |
Request changes or add full text files to a record
Repository staff actions (login required)
 |
View Item |
Downloads
Downloads per month over past year
