Interpretation of the biological species concept from interspecific hybridization of two Helicoverpa species  

作　　者：WANG ChenZhu 

机构地区：[1]State Key Laboratory of Integrated Management of Pest Insects and Rodents, Institute of Zoology, Chinese Academy of Sciences, Beijing 100080, China

出　　处：《Chinese Science Bulletin》2007年第2期284-286,共3页

基　　金：the National Natural Science Foundation of China (Grant No. 30330100);the CAS Innovative Research International Partnership Project (Grant No. CXTDS2005-4)

摘　　要：The biological species concept defines species in terms of interbreeding. Interbreeding between spe-cies is prevented by reproductive isolation mechanisms. Based on our results of interspecific hybridi-zation between Helicoverpa armigera and Helicoverpa assulta, reproductive isolation mechanisms of the two species are analyzed. A combination of prezygotic factors (absent sex attraction and physical incompatibility of the genitalia) and postzygotic factors (female absence and partial sterility in F1 hy-brids) causes reproductive isolation of the two species. In addition, the role of interspecific hybridiza-tion in speciation is discussed.The biological species concept defines species in terms of interbreeding. Interbreeding between species is prevented by reproductive isolation mechanisms. Based on our results of interspecific hybridization between Helicoverpa armigera and Helicoverpa assulta, reproductive isolation mechanisms of the two species are analyzed. A combination of prezygotic factors （absent sex attraction and physical incompatibility of the genitalia） and postzygotic factors （female absence and partial sterility in F1 hybrids） causes reproductive isolation of the two species. In addition, the role of interspecific hybridization in speciation is discussed.

关 键 词：生物学种 生物进化 杂交 再生机制 

分 类 号：Q111.21[生物学—普通生物学]