Inheritance of glyphosate resistance in rigid ryegrass (Lolium rigidum) from California
| Autor: | Donald Penner, Suleiman S. Bughrara, Marulak Simarmata |
|---|---|
| Rok vydání: | 2005 |
| Předmět: |
0106 biological sciences
education.field_of_study Resistance (ecology) ved/biology Lolium rigidum Population ved/biology.organism_classification_rank.species food and beverages Recurrent selection 04 agricultural and veterinary sciences Plant Science Biology 01 natural sciences First generation 010602 entomology chemistry.chemical_compound Agronomy chemistry Glyphosate 040103 agronomy & agriculture 0401 agriculture forestry and fisheries education Agronomy and Crop Science |
| Zdroj: | Weed Science. 53:615-619 |
| ISSN: | 1550-2759 0043-1745 |
| Popis: | Glyphosate resistance was found in a rigid ryegrass population in northern California. A sample of the resistant plants were collected and grown under greenhouse conditions. The objective of this study was to evaluate glyphosate resistance in the progeny of the collected plants by recurrent selection, obtain the homozygous resistant and sensitive lines to establish dose-response curves, and to determine the inheritance of glyphosate resistance in rigid ryegrass. Diverse levels of resistance were observed in the first generation with survival of 89, 59, 45, and 9% from glyphosate at 1x, 2x, 4x, and 8x respectively, where x = 1.12 kg ha−1isopropylamine salt of glyphosate. Clones of plants that died from 1x were allowed to produce seed and were further subjected to recurrent selection to generate the most sensitive plants (S lines), which died from 0.125x glyphosate. The most resistant plants (R lines) were generated from the survivors receiving 8x glyphosate. The ratio between I50rates for the glyphosate resistant and the glyphosate sensitive plants was > 100-fold. The R and S lines were crossed reciprocally and F1progeny of both (R × S) and (S × R) showed intermediate resistance. These survived up to 2x glyphosate. The F2progeny were generated by intercrossing of F1plants. The ratio of sensitive, intermediate, and resistant plants in the F2population before the treatment of glyphosate at 0.125x followed by 8x was 1 : 16, 14 : 16, and 1 : 16 respectively, which corresponded to the Mendelian segregation ratio of two genes. The results indicated that the inheritance of glyphosate resistance in rigid ryegrass from California appeared to be nuclear, incompletely dominant, multigenic, and pollen-transmitted with no indication of maternal inheritance. |
| Databáze: | OpenAIRE |
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