Hybridization and introgression between Helicoverpa armigera and H. zea: an adaptational bridge

Autor(es)

Cordeiro, Erick M. G. ^[1] ; Pantoja-Gomez, Laura M. ^[1] ; de Paiva, Julia B. ^[1] ; Nascimento, Antonio R. B. ^{[1, 2, 3]} ; Omoto, Celso ^[1] ; Michel, Andrew P. ^{[2, 3]} ; Correa, Alberto S. ^[1]

Afiliação do(s) autor(es)

^[1] Univ Sao Paulo, Luiz de Queiroz Coll Agr, Dept Entomol & Acarol, BR-13418900 Sao Paulo - Brazil

^[2] Ohio State Univ, Ohio Agr Res & Dev Ctr, Dept Entomol, Thorne Hall, 680 Madison Ave, Wooster, OH 44691 - USA

^[3] Ohio State Univ, Ohio Agr Res & Dev Ctr, Ctr Appl Plant Sci, Thorne Hall, 1680 Madison Ave, Wooster, OH 44691 - USA

• Tipo de documento: Artigo Científico
• Fonte: BMC Evolutionary Biology; v. 20, n. 1 MAY 25 2020.
• Citações Web of Science: 0

Resumo

Background Invasion of organisms into new ecosystems is increasingly common, due to the global trade in commodities. One of the most complex post-invasion scenarios occurs when an invasive species is related to a native pest, and even more so when they can hybridize and produce fertile progeny. The global pest Helicoverpa armigera was first detected in Brazil in 2013 and generated a wave of speculations about the possibility of hybridization with the native sister taxon Helicoverpa zea. In the present study, we used genome-wide single nucleotide polymorphisms from field-collected individuals to estimate hybridization between H. armigera and H. zea in different Brazilian agricultural landscapes. Results The frequency of hybridization varied from 15 to 30% depending on the statistical analyses. These methods showed more congruence in estimating that hybrids contained approximately 10% mixed ancestry (i.e. introgression) from either species. Hybridization also varied considerably depending on the geographic locations where the sample was collected, forming a `mosaic' hybrid zone where introgression may be facilitated by environmental and landscape variables. Both landscape composition and bioclimatic variables indicated that maize and soybean cropland are the main factors responsible for high levels of introgression in agricultural landscapes. The impact of multiple H. armigera incursions is reflected in the structured and inbred pattern of genetic diversity. Conclusions Our data showed that the landscape composition and bioclimatic variables influence the introgression rate between H. armigera and H. zea in agricultural areas. Continuous monitoring of the hybridization process in the field is necessary, since agricultural expansion, climatic fluctuations, changing composition of crop species and varieties, and dynamic planting seasons are some factors in South America that could cause a sudden alteration in the introgression rate between Helicoverpa species. Introgression between invasive and native pests can dramatically impact the evolution of host ranges and resistance management. (AU)

• Processo FAPESP: 16/04159-2 - Um enfoque demográfico e adaptativo visando a construção de estratégias sustentáveis de manejo de pragas agrícolas para o agroecossistema brasileiro
• Beneficiário: Júlia Barbosa de Paiva
• Modalidade de apoio: Bolsas no Brasil - Programa Capacitação - Treinamento Técnico
• Processo FAPESP: 14/26212-7 - Exploração de técnicas de sequenciamento de nova geração (SNG) para a identificação de marcadores moleculares para o monitoramento da resistência de Spodoptera frugiperda (J.E. Smith) (Lepidoptera: Noctuidae) a inseticidas e proteínas Bt
• Beneficiário: Antonio Rogério Bezerra do Nascimento
• Modalidade de apoio: Bolsas no Brasil - Doutorado
• Processo FAPESP: 14/11495-3 - Um enfoque demográfico e adaptativo visando a construção de estratégias sustentáveis de manejo de pragas agrícolas para o agroecossistema brasileiro
• Beneficiário: Alberto Soares Corrêa
• Modalidade de apoio: Auxílio à Pesquisa - Jovens Pesquisadores
• Processo FAPESP: 17/02393-0 - Resistência de Euschistus heros (Hemiptera: Pentatomidae) a inseticidas: diversidade genética e detecção de marcadores moleculares associados a genes de resistência
• Beneficiário: Erick Mauricio Goes Cordeiro
• Modalidade de apoio: Bolsas no Brasil - Pós-Doutorado
• Processo FAPESP: 16/09159-0 - Mapa genético e QTLs associados a resistência de Spodoptera frugiperda (J. e. Smith) a inseticidas e toxinas Bt
• Beneficiário: Antonio Rogério Bezerra do Nascimento
• Modalidade de apoio: Bolsas no Exterior - Estágio de Pesquisa - Doutorado