Elucidation of Genetic Diversity of the Common Cutworm, <i>Spodoptera litura</i> (Lepidoptera: Noctuidae) between Indigenous Areas in Asia and the Islands of Japan

Nishimoto Naoko, Hatakeyama Yoshinori, Watanabe Mai, Takahashi Moe, Miyake Syouhei, Yamamoto Yuuichi, Shigano Tomoaki, Ohbayashi Satoshi, Iwano Hidetoshi

doi:10.1303/jjaez.2016.23

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日本および周辺諸国におけるハスモンヨトウ（チョウ目：ヤガ科）の地域的遺伝子差異の解明
ニホンオヨビシュウヘンショコクニオケルハスモンヨトウ(チョウモク:ヤガカ)ノチイキテキイデンシサイノカイメイ

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Abstract

The common cutworm, Spodoptera litura (Fabricius) has a low tolerance to cold; nevertheless, it migrates to Japan from warmer surroundings every year. To clarify the genetic diversity among divergent areas in Asia, phylogenetic relationships were examined by cytochrome oxidase I (COI) sequencing and genome profiling of extracted DNA from S. litura isolated from four Asian countries and eight domestic areas in Japan. Our results clearly showed genomic differences among individuals isolated from Southeast Asia, especially Thailand and Indonesia, compared with those from the domestic areas in Japan, suggesting that this species has formed indigenous populations among these areas. Moreover, evidence indicates that S. litura does not migrate to Japan directly from areas in Southeast Asia because many samples collected throughout Japan were the same strain, which indicated that the S. litura moths migrated from the Ogasawara islands. The individuals collected from China, Taiwan, and Okinawa shared the same cluster. These results certainly indicate that the adult moths of S. litura indigenous to Southern China and Taiwan migrate to Japan via Okinawa.

Journal

Japanese Journal of Applied Entomology and Zoology

Japanese Journal of Applied Entomology and Zoology 60 (1), 23-31, 2016

JAPANESE SOCIETY OF APPLIED ENTOMOLOGY AND ZOOLOGY

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