Differences in leafminer (Phyllonorycter, Gracillariidae, Lepidoptera) and aphid (Tuberculatus, Aphididae, Hemiptera) composition among Quercusdentata, Q. crispula, Q. serrata, and their hybrids |
| |
| Authors: | Yoshihiro Hata Takuto Hashiba Takashi Nakamura Masashi Kitamura Takahide A Ishida Shin-ichi Akimoto Hiroaki Sato and Masahito T Kimura |
| |
| Institution: | (1) Graduate School of Environmental Earth Science, Hokkaido University, Sapporo Hokkaido, 060-0810, Japan;(2) Graduate School of Agriculture, Hokkaido University, Sapporo Hokkaido, 060-8589, Japan;(3) Faculty of Science, Nara Woman’s University, Nara 630-8506, Japan;(4) Present address: Ume? Plant Science Centre, Department of Forest Genetics and Plant Physiology, Swedish University of Agricultural Sciences, 901-83 Ume?, Sweden; |
| |
| Abstract: | Leafminer (Phyllonorycter, Gracillariidae, Lepidoptera) and aphid (Tuberculatus, Aphididae, Hemiptera) composition were studied in three deciduous oak species, Quercus dentata, Q. crispula, and Q. serrata, and their hybrids in Tomakomai Experimental Forest of Hokkaido University, Hokkaido, northern Japan. Identification of trees
in this forest was done mainly on the basis of discriminant analysis on leaf morphology with reference to trees in pure Q. dentata and Q. crispula stands and a Q. serrata stand mixed with Q. crispula. The results suggested that hybridization occurred in all combinations (i.e. Q. dentata–Q. crispula, Q. crispula–Q. serrata, and Q. serrata–Q. dentata) and the frequency of hybrids was approximately 10%. The composition of Phyllonorycter and Tuberculatus species differed between Q. dentata and Q. crispula or Q. serrata, but did not differ between Q. crispula and Q. serrata. Thus, Q. dentata could differ from Q. crispula and Q. serrata in chemical properties that determine herbivore host selection, survival, and performance, possibly reflecting eco-physiological
differences or phylogenetic distances. The study insects were divided into three groups: species specialized to Q. dentata (three Phyllonorycter and one Tuberculatus species), those to Q. crispula and Q. serrata (six Phyllonorycter and two Tuberculatus species), and a species collected at least from Q. dentata and Q. crispula (one Tuberculatus species). Putative hybrid trees of Q. dentata and Q. crispula harbored both Q. dentata-specific and Q. crispula-specific insects. |
| |
| Keywords: | |
| 本文献已被 SpringerLink 等数据库收录！ |
|
