Reproductive isolation between two populations of Diatraea saccharalis (F.) (Lepidoptera: Crambidae) from different host plant species and regions in Argentina.
The sugarcane borer, Diatraea saccharalis (F.), has a widespread distribution throughout the Western Hemisphere and is a pest of many crop plants including sugarcane, corn, sorghum and rice. The use of Bacillus thuringiensis (Bt) corn has been the primary tool for managing this species in corn fields. Sugarcane borer control has been recently threatened by observations of susceptibility and/or resistance to certain varieties of Bt corn and the protein used in many newer varieties. This has led to increased interest in understanding sugarcane borer genetic diversity and gene flow within and among its populations and the consequent exchange of alleles between geographically distant populations. The objective of this study was to examine reproductive compatibility between host-associated geographic populations of D. saccharalis in Argentina and to determine whether this pest represents a complex of host-associated cryptic species rather than a wide ranging generalist species. Intra and inter-population crosses revealed that D. saccharalis populations from the northwestern and Pampas regions presented evidence of prezygotic and postzygotic incompatibility. Such a result is likely to be the product of an interruption of gene flow produced by either geographic or host plant associated isolation, suggesting that Tucumán (northwestern) and Buenos Aires (Pampas) populations of D. saccharalis are a distinct genotype and possibly an incipient species.
Estación Experimental Agroindustrial Obispo Colombres (EEAOC) - Consejo Nacional de Investigaciones Científicas y Técnicas (CONICET),Instituto de Tecnología Agroindustrial del Noroeste Argentino (ITANOA),Av. William Cross 3150. C.P. T4101XAC,Las Talitas,Tucumán,Argentina.
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Fogliata
Estación Experimental Agroindustrial Obispo Colombres (EEAOC) - Consejo Nacional de Investigaciones Científicas y Técnicas (CONICET),Instituto de Tecnología Agroindustrial del Noroeste Argentino (ITANOA),Av. William Cross 3150. C.P. T4101XAC,Las Talitas,Tucumán,Argentina.
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A
Vera
Estación Experimental Agroindustrial Obispo Colombres (EEAOC) - Consejo Nacional de Investigaciones Científicas y Técnicas (CONICET),Instituto de Tecnología Agroindustrial del Noroeste Argentino (ITANOA),Av. William Cross 3150. C.P. T4101XAC,Las Talitas,Tucumán,Argentina.
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Gastaminza
Estación Experimental Agroindustrial Obispo Colombres (EEAOC) - Consejo Nacional de Investigaciones Científicas y Técnicas (CONICET),Instituto de Tecnología Agroindustrial del Noroeste Argentino (ITANOA),Av. William Cross 3150. C.P. T4101XAC,Las Talitas,Tucumán,Argentina.
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MI
Cuenya
Agência Paulista de Tecnologia dos Agronegócios,Piracicaba,SP,Brazil.
M I
MI
Zucchi
Estación Experimental Agroindustrial Obispo Colombres (EEAOC) - Consejo Nacional de Investigaciones Científicas y Técnicas (CONICET),Instituto de Tecnología Agroindustrial del Noroeste Argentino (ITANOA),Av. William Cross 3150. C.P. T4101XAC,Las Talitas,Tucumán,Argentina.
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Willink
Estación Experimental Agroindustrial Obispo Colombres (EEAOC) - Consejo Nacional de Investigaciones Científicas y Técnicas (CONICET),Instituto de Tecnología Agroindustrial del Noroeste Argentino (ITANOA),Av. William Cross 3150. C.P. T4101XAC,Las Talitas,Tucumán,Argentina.
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AP
Castagnaro
Estación Experimental Agroindustrial Obispo Colombres (EEAOC) - Consejo Nacional de Investigaciones Científicas y Técnicas (CONICET),Instituto de Tecnología Agroindustrial del Noroeste Argentino (ITANOA),Av. William Cross 3150. C.P. T4101XAC,Las Talitas,Tucumán,Argentina.
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Murúa
D000818:Animals; D001118:Argentina; D001413:Bacillus thuringiensis; D005260:Female; D060434:Herbivory; D058507:Host Specificity; D008297:Male; D009036:Moths / Q000502:physiology*; D010571:Pest Control / Q000379:methods; D012098:Reproduction; D012934:Social Isolation
cryptic species; fitness; insect resistance management; reproductive compatibility; sugarcane borer