| Interpretation of the biological species concept from interspecific hybridization of two Helicoverpa species |
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| 作者姓名： | WANG ChenZhu |
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| 作者单位： | WANG ChenZhu State Key Laboratory of Integrated Management of Pest Insects and Rodents，Institute of Zoology，Chinese Academy of Sciences，Beijing 100080，China |
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| 基金项目： | Supported by the National Natural Science Foundation of China （Grant No. 30330100） and the CAS Innovative Research International Partnership Project （Grant No. CXTDS2005-4）. I thank my colleagues and graduate students in my group, Prof. Zhao ChengHua, Yah YunHua, Wang HongLei, Zhao XinCheng, Tang QingBo, Dong JunFeng, Ming QingLei, and visiting Prof. Joop J. A. van Loon from Wageningen University of the Netherlands for their contributions to the researches. |
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| 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.
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| 关 键 词： | 生物学种 生物进化 杂交 再生机制 |
| 收稿时间： | 5 July 2006 |
| 修稿时间： | 2006-07-052006-09-21 |
Interpretation of the biological species concept from interspecific hybridization of two Helicoverpa species |
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| WANG ChenZhu.Interpretation of the biological species concept from interspecific hybridization of two Helicoverpa species[J].Chinese Science Bulletin,2007,52(2):284-286. |
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| Authors: | ChenZhu Wang |
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| Institution: | (1) State Key Laboratory of Integrated Management of Pest Insects and Rodents, Institute of Zoology, Chinese Academy of Sciences, Beijing, 100080, China |
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| Abstract: | 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. |
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| Keywords: | biological species concept reproductive isolation interspecific hybridization Helicoverpa armigera Helicoverpa assulta |
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