Crossing between nondiapausing and diapausing races of Sarcophaga peregrina |
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Authors: | H Kurahashi T Ohtaki |
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Institution: | (1) Department of Medical Entomology, National Institute of Health, 10-35, Kamiosaki, 2 Chome, Shinagawa-ku, 141 Tokyo, (Japan);(2) Present address: Department of Biology, Faculty of Science, Kanazawa University, 920 Kanazawa, Japan |
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Abstract: | Summary The temperate race (D) ofS. peregrina undergoes pupal diapause in response to certain environmental conditions of photoperiod (13L:11D–11L:13D) and temperature (under 20°C). The tropical race (ND) does not do so under the same circumstances. The tendency toward diapause was suppressed in 30–40% of the hybrids of crossings D×ND and ND×D even under such short day and low temperature conditions as 11L:13D–9L:15D, 20°C. For entering diapause, the hybrids require a shorter day length (13L:11D) than that of (D) parents (15L:9D).We thank Dr R. Kano and Dr S. Shinonaga, Tokyo Medical and Dental University, for supplying the New Guinean material. |
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