Effect of barley chromosome addition on the susceptibility of wheat to feeding by a gall-inducing leafhopper |
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Authors: | Shun Kumashiro Keiichiro Matsukura Kanako Kawaura Masaya Matsumura Yasunari Ogihara Makoto Tokuda |
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Institution: | (1) Graduate School of Bioresource and Bioenvironmental Sciences, Kyushu University, Fukuoka 812-8581, Japan;(2) Research Team for Insect and Nematode Management, National Agricultural Research Center for Kyushu Okinawa Region, Koshi Kumamoto, 861-1192, Japan;(3) Kihara Institute for Biological Research, Yokohama City University, Yokohama 244-0813, Japan;(4) Center for Research and Advancement in Higher Education, Kyushu University, Fukuoka 819-0395, Japan;(5) Present address: Laboratory of System Ecology, Faculty of Agriculture, Saga University, Saga 840-8502, Japan; |
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Abstract: | The maize orange leafhopper Cicadulina bipunctata is distributed widely in tropical and subtropical regions of the Old World and feeds on various Poaceae. The leafhopper is
recognized as an important pest of maize in several countries. Adults as well as nymphs of C. bipunctata induce growth stunting and galls characterized by the severe swelling of leaf veins on many cereal crops including wheat,
rice, and maize, but do not on barley. To clarify the mechanism of growth stunting and gall induction by C. bipunctata, we used six barley chromosome disomic addition lines of wheat (2H–7H) and investigated the effect of barley (cv. Betzes)
chromosome addition on the susceptibility of wheat (cv. Chinese Spring) to feeding by the leafhopper. Feeding by C. bipunctata significantly stunted the growth in 2H, 3H, 4H, and 5H, but did not in 6H and 7H. The degree of gall induction was significantly
weaker and severer in 3H and 5H than in Chinese Spring, respectively. These results suggest that barley genes resistant to
growth stunting and gall induction exist in 6H and 7H, and 3H, respectively. 5H is considered to be useful for future assays
investigating the mechanism of gall induction by this leafhopper because of the high susceptibility to the feeding by C. bipunctata. Significant correlation between the degrees of growth stunting and gall induction was not detected in the six chromosome
addition lines and Chinese spring. This implies that these two symptoms are independent phenomena although both are initiated
by the feeding of C. bipunctata. |
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