Agricultural and Forest Entomology (2021) 23, 250-260

Clérison R. Perini, Verónica I. Sosa, Vicente E. Koda, Horacio Silva, Andrés A. Risso, Wanessa N.F. Vasconcelos, Carolina F. Gonçalves, Gustavo A. Ugalde, Dayanna N. Machado, Caroline B. Bevilacqua, Daniel M.P. Ardisson-Araújo, Kevin Maebe, Guy Smagghe, Ivair Valmorbida and Jerson C. Guedes (2021)
Genetic structure of two Plusiinae species suggests recent expansion of Chrysodeixis includens in the American continent
Agricultural and Forest Entomology 23 (3), 250-260
Abstract: - The Plusiinae subfamily has many polyphagous species, many of which occur in South America. Chrysodeixis includens and Rachiplusia nu are two representatives that mainly occurs in soybeans, cotton, common beans, sunflower and alfalfa.
- A population genetic study of C. includens and R. nu collected in the Southern Cone of America was performed using a partial COI gene sequencing data and compared with specimens from other American countries.
- Six haplotypes were identified in C. includens populations of Brazil, Argentina, Paraguay and Uruguay, organized within a star-like haplotype network, with the most common haplotype identified as Chin_MC.
- R. nu populations are more diverse and stable in comparison to C. includens. Populations from Argentina and Uruguay had the highest haplotype diversity, sharing five haplotypes and putatively indicating haplotype exchange.
- Demographic change analysis suggested a recent population expansion of C. includens over the American continent.
- Some C. includens haplotypes were country-specific, suggesting population expansion in the countries where specimens were collected.
(The abstract is excluded from the Creative Commons licence and has been copied with permission by the publisher.)
Link to article at publishers website
Database assignments for author(s): Guy Smagghe

Research topic(s) for pests/diseases/weeds:
population dynamics/ epidemiology
molecular biology - genes

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Pest and/or beneficial records:

Beneficial	Pest/Disease/Weed	Crop/Product	Country	Quarant.
	Chrysodeixis includens		Argentina
	Chrysodeixis includens		Paraguay
	Chrysodeixis includens		Uruguay
	Chrysodeixis includens	Soybean (Glycine max)	Brazil (south)
	Rachiplusia nu		Uruguay
	Rachiplusia nu	Soybean (Glycine max)	Argentina