Phylogeography of silver‐studded blue, Plebejus subsolanus (Lepidoptera: Lycaenidae), in the central mountainous regions of Japan,Entomological Science

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Phylogeography of silver‐studded blue, Plebejus subsolanus (Lepidoptera: Lycaenidae), in the central mountainous regions of Japan
Entomological Science ( IF 0.9 ) Pub Date : 2020-04-29 , DOI: 10.1111/ens.12416
Shouhei Ueda _{1,

2,

3} , Takatoshi Nakatani ₄ , Masashi Fukumoto ₅ , Kiyoshi Maruyama ₅ , Tateo Itoh ₁ , Shin‐ichi Usami ₃

Affiliation

The silver‐studded blue, Plebejus subsolanus, is widely distributed in the Russian Altai mountains, northeastern China, the Korean Peninsula, and the Japanese archipelago. In Japan, the species is distributed across wide elevation ranges from the lowlands of Hokkaido to the subalpine zone of Honshu. Current subspecies classification in Japan is as follows: ssp. iburiensis, occurring in lowland grasslands in Hokkaido; ssp. yaginus in lower mountain grasslands in Honshu; and ssp. yarigadakeanus in higher mountain grasslands in Honshu. The habitat of this species has been markedly reduced due to recent habitat destruction and land‐use changes. Here, we undertook phylogeographic analyses of two subspecies, ssp. yaginus and yarigadakeanus in the central mountainous regions of Japan, based on two mitochondrial gene sequences, in order to collect information for establishing effective conservation strategies. From 57 samples from the four mountain ranges, we obtained a haplotype network comprised of 12 haplotypes. Because of the haplotype network topology, the geographic distribution of haplotypes and the correspondence of haplotype divergence to subspecies taxonomy, we provisionally divided the haplotypes into three haplogroups: YR1 and YR2, which comprised ssp. yarigadakeanus, and YG, which comprised ssp. yaginus. Mitochondrial DNA genetic differentiation generally agreed with morphological subspecies classification. The haplotype network suggested that ssp. yarigadakeanus populations had multiple origins, and the subspecies character of “bright blue of the male's wings” was assumed to have evolved independently in each subalpine meadow. We found that P. subsolanus was genetically differentiated depending upon the elevation at each mountain region, suggesting that each haplogroup should be a conservation unit.

更新日期：2020-04-29

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