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Introgression between divergent corn borer species in a region of sympatry: Implications on the evolution and adaptation of pest arthropods

文献类型： 外文期刊

作者： Wang, Yangzhou 2 ; Kim, Kyung Seok 3 ; Guo, Wenchao 4 ; Li, Qiyun 2 ; Zhang, Yunyue 2 ; Wang, Zhenying 1 ; Coates, Bra 1 ;

作者机构： 1.Chinese Acad Agr Sci, Inst Plant Protect, State Key Lab Biol Plant Dis & Insect Pests, Beijing, Peoples R China

2.Jilin Acad Agr Sci, Changchun, Jilin, Peoples R China

3.Iowa State Univ, Dept Nat Resource Ecol & Management, Ames, IA USA

4.Xinjiang Acad Agr Sci, Res Inst Plant Protect, Urumqi, Peoples R China

5.Iowa State Univ, USDA, ARS, Corn Insects & Crop Genet Res Unit, Ames, IA USA

关键词： gene flow;secondary contact;species divergence

期刊名称：MOLECULAR ECOLOGY （ 影响因子：6.185； 五年影响因子：6.801 ）

ISSN：

年卷期：

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收录情况： SCI

摘要： The Asian corn borer, Ostrinia furnacalis, and European corn borer, O. nubilalis (Lepidoptera: Crambidae), cause damage to cultivated maize in spatially distinct geographies and have evolved divergent hydrocarbons as the basis of sexual communication. The Yili area of Xinjiang Uyghur Autonomous Region in China represents the only known region where O. furnacalis has invaded a native O. nubilalis range, and these two corn borer species have made secondary contact. Genetic differentiation was estimated between Ostrinia larvae collected from maize plants at 11 locations in Xinjiang and genotyped using high-throughput SNP and microsatellite markers. Maternal lineages were assessed by direct sequencing of mitochondrial cytochrome c oxidase subunit I and II haplotypes, and a high degree of genotypic diversity was demonstrated between lineages based on SNP genotypes. Furthermore, historical introgression was predicted among SNP genotypes only at sympatric locations in the Yili area, whereas in Xinjiang populations only O. furnacalis haplotypes were detected and no analogous introgressed genotypes were predicted. Our detection of putative hybrids and historical evidence of introgression defines Yili area as a hybrid zone between the species in normal ecological interactions and furthermore, might indicate that adaptive traits could spread even between seemingly divergent species through horizontal transmission. Results of this study indicate there may be a continuum in the degree of reproductive isolation between Ostrinia species and that the elegance of distinct and complete speciation based on modifications to the pheromone communication might need to be reconsidered.

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