Demographics of glyphosate-resistant and susceptible Italian ryegrass populations from Paraná
Autor: | Patrícia Bortolanza Pereira, José Luis González-Andújar, Helis Marina Salomão, Katia Cristina Dalpiva Hartmann, Michelangelo Muzell Trezzi, Fortunato De Bortoli Pagnoncelli |
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Přispěvatelé: | Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (Brasil), Universidade Tecnológica Federal do Paraná, CSIC - Instituto de Agricultura Sostenible (IAS) |
Rok vydání: | 2021 |
Předmět: |
education.field_of_study
Seed production biology Resistance (ecology) Demographics Physiology Population Lolium multiflorum L Cohort Plant Science Lolium multiflorum biology.organism_classification Fecundity Biochemistry chemistry.chemical_compound Seedling emergence Agronomy chemistry Seedling Glyphosate Seedling Survival education Agronomy and Crop Science |
Zdroj: | Digital.CSIC. Repositorio Institucional del CSIC instname Advances in Weed Science, Volume: 39, Article number: e02100011, Published: 14 JUN 2021 |
Popis: | Italian ryegrass ( Lolium multiflorum L.) has become notorious due to glyphosate resistance evolution. To study the demography of susceptible and glyphosate-resistant Italian ryegrass populations, several experiments were conducted in the grower’s field to evaluate seedling emergence, survival and reproductive traits patterns in three cohorts, and the effect of density on seed production. Results showed that seedling emergence is fast, and under suitable environmental conditions, it can happen within 30-days. Lower plant survival was observed in the first two cohorts (2% and 3%, respectively) compared to the last (13%). A larger number of spikes (spk) per plant (pl) was observed in plants of the first two cohorts (50.34 and 47.02 spk pl-1, respectively) in comparison to the last one (26 spk pl-1); however, the third cohort presented a higher potential for flower (flwrs) production per spikelets (spklt) (13.5 flwrs spklt-1) in detriment to the first two (11.9 and 12.12 flwrs spklt-1). Fecundity was 20,300 and 13,830 seeds pl-1 for susceptible and glyphosate-resistant plants, respectively, and presented density-dependent regulation. A knowledge of Italian ryegrass’s demographic parameters provides valuable information for identifying particularly vulnerable life-history processes and developing population dynamics models that can contribute to designing more rational control strategies. The authors are grateful to the Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (Capes), Universidade Tecnológica Federal do Paraná (UTFPR) and Instituto de Agricultura Sostenible Consejo Superior de Investigaciones Científicas (IAS-CSIC) for the infrastructure and financial support. |
Databáze: | OpenAIRE |
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