Mechanism of feeding deterrence of barley seedlings against the migratory locust

迁徙蝗以多种禾本科植物为食，大麦除外。大麦取食抑制相关基因对培育新型抗性作物具有重要意义。研究了大麦品种贝齐斯（Betzes）、小麦品种中国春（CS）和6个大麦染色体二体附加系（2H-7H）对迁徙蚁运动活性、摄食行为、存活和发育的影响。与小麦和2H-7H一起饲养的若虫运动活性相似，而与小麦和2H-7H一起饲养的若虫运动活性普遍较高。摄食试验表明，与抑制迁徙l.a摄食相关的大麦基因位于大麦染色体5H和6H上，与植物适口性相关的基因位于染色体2H、5H和6H上。饲养实验表明，大麦基因在5H和2H染色体上分别对蝗虫若虫的生存和生长产生负向影响，且这种影响是相依赖性的。研究结果发表在Suematsu et al.（2013）。

Locusta migratoria feeds on various Poaceae but barley. Barley genes related to feeding deterrence are useful for developing novel resistant crops. We investigated the effects of barley cultivar Betzes, wheat cultivar Chinese Spring (CS), and six barley chromosome disomic addition lines of wheat (2H-7H) on locomotor activity, feeding behavior, survival and development of L. migratoria. Locomotor activity was similar in nymphs kept with wheat and 2H-7H in an actograph, whereas it was generally high in those kept with barely. Feeding tests suggested that barley genes related to inhibition of feeding by L. migratoria are located on barley chromosomes 5H and 6H and those related to the palatability of plants on chromosomes 2H, 5H and 6H. Rearing experiments suggested the presence of barley genes negatively affecting the survival and growth of locust nymphs on chromosomes 5H and 2H, respectively, and the effects are phase-dependent. The results were published in Suematsu et al. (2013).