Fitness and mating compatibility of Chrysodeixis includens (W.) (Lepidoptera: 2 Noctuidae) populations collected in different provinces and crops in Argentina

DAMI LC; HERRERO MI; CASMUZ AS; ALZOGARAY RA; GASTAMINZA GA

ANAIS DA ACADEMIA BRASILEIRA DE CIENCIAS.

ACAD BRASILEIRA DE CIENCIAS

Lugar: Rio de Janeiro; Año: 2021 vol. 93 p. 1 - 14

0001-3765

Chrysodeixis includens, is an important Plusiinae pest that feeds on soybean, beans, andcotton. This species has a genetic structure determined by molecular markers in populationcollected in soybean crop from Brazil and has developed resistance to insecticides. This hadled to an increased interest in the genetic diversity and structure of its populations inArgentina. This study aimed to characterize fitness parameters and mating compatibility ofgeographically distant C. includens populations and on different host plants in Argentina.Intra- and interpopulation crosses revealed that C. includens populations from the Tucumánand Santiago del Estero provinces did not present evidence of prezygotic and postzygoticincompatibilities, suggesting that both populations collected from soybean plants belongedto a single wide-ranging species. Prezygotic and postzygotic incompatibilities weredetected between populations collected from different crops (soybean and bean). Theseincompatibilities may be based on the different nutrients each plant species renders or thespecific pest control strategies, which may affect C. includens behavior. Further studies ofthe genetic structure of C. includens populations based on mating isolation on other crops,as well as of the impact of management strategies on the specie, will increaseunderstanding of the genetic structure revelated by the present study.