No apparent fitness costs associated with phytoene desaturase mutations conferred resistance to diflufenican and picolinafen in oriental mustard (Sisymbrium orientale L.)
| Autor: | Christopher Preston, Hue Thi Dang, Gurjeet Gill, Jenna Malone, Weihua Long |
|---|---|
| Rok vydání: | 2019 |
| Předmět: |
Niacinamide
0106 biological sciences 0301 basic medicine Phytoene desaturase Health Toxicology and Mutagenesis media_common.quotation_subject 01 natural sciences Competition (biology) 03 medical and health sciences Cleaved amplified polymorphic sequence Sisymbrium orientale Allele Gene Plant Proteins media_common Genetics biology Herbicides Point mutation food and beverages General Medicine biology.organism_classification Fecundity 010602 entomology 030104 developmental biology Mutation Oxidoreductases Agronomy and Crop Science Herbicide Resistance Mustard Plant |
| Zdroj: | Pesticide Biochemistry and Physiology. 155:51-57 |
| ISSN: | 0048-3575 |
| DOI: | 10.1016/j.pestbp.2019.01.005 |
| Popis: | Two mutations Leu498 and Glu425 in the PDS gene were identified as the main cause conferring resistance to diflufenican and picolinafen in two oriental mustard populations P3 and P40. As mutations are suspected to affect fitness, this study was designed to test this hypothesis using the F2 of two crosses P3.2 (P3♂ × S♀) and P40.5 (P40♂ × S♀) of oriental mustard. The F2 plants, which segregated for target-site point mutations of PDS gene (Leu498 and Glu425) grown in monoculture and under competition with wheat in pot-trials and evaluated for growth and fecundity. All F2 individuals were genotyped by using Cleaved Amplified Polymorphic Sequence (CAPS) technique. Regression analysis showed no fitness cost in the resistant plants because no significant difference was identified in seed and biomass production within RR, RS and SS individuals. The absence of measurable negative effects on fitness associated mutations suggests that the frequency of the PDS resistance alleles will not decline in the absence of selection pressure of PDS-inhibitors. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|
Full Text from ScienceDirect