ABSTRACT
Drosophila lacertosa is widely distributed from northern India to Far East of Russia throughout China. We have studied geographical distributions of three kinds of chromosomal karyotypes, type D (2n=10, 4 pairs of V-shaped metacentric chromosomes and a pair of micro-chromosomes), type L (2n=10, 5V with a pair of large-sized heterochromatic autosomes) and type M (2n=10, 5V with middle-sized ones). Type D was found exclusively in local populations of D. lacertosa distributed in Yun-Gui Plateau, southwestern China. Both type L and M have a wide range of distribution, and the former occurred in subtropical regions of China including Taiwan Island, whereas the latter in cool temperate regions of East Asia covering Far East of Russia, Korea and the Japan Islands. A strong premating isolation was detected between flies with type D and those with type L or M. These data demonstrate that genetic differentiation leading to cryptic speciation might have occurred in natural populations of Drosophila lacertosa.
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Acknowledgements
We are grateful to Dr. MJ Toda (Hokkaido University), Dr. QT Zeng (Hubei University), Dr. HW Chen (Tokyo Metropolitan University, TMU), Dr. JJ Gao (Kunming Institute of Zoology, KIZ), Mr. BC Wang (KIZ), Dr. JG Xiang-Yu (KIZ), Miss. C Tanaka (TMU), Mr. S Saito (TMU), Mr. A Nozawa (TMU) and Mr. H Ito (Hokkaido University of Education) for their help in field collection and stocks. We also thank Dr. XZ. Zheng (University of Pennsylvania Medical School) and Dr. XC Liang (KIZ) for invaluable discussion on the earlier version of the manuscript. The present work was supported by National Natural Science Foudation of China, (No. 39930100, 30024004), Chinese Academy of Science (No. KSCX2- 1-05) and Japan Society for the Promotion of Science (No. 12375002)
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HE, L., WATABE, H., ZHANG, Y. et al. Karyotype differentiation and reproductive isolation among natural populations of Drosophila lacertosa. Cell Res 13, 491–497 (2003). https://doi.org/10.1038/sj.cr.7290192
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DOI: https://doi.org/10.1038/sj.cr.7290192
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