Voothuluru Priyamvada, Meng Jianye, Khajuria Chitvan, Louis Joe, Zhu Lieceng, Starkey Sharon, Wilde Gerald E, Baker Cheryl A, Smith C Michael
Division of Plant Sciences, University of Missouri, Columbia, MO 65201, USA.
J Econ Entomol. 2006 Oct;99(5):1854-61. doi: 10.1603/0022-0493-99.5.1854.
The Russian wheat aphid, Diuraphis noxia (Kurdjumov) (Homoptera: Aphididae), is one of the most devastating insect pests of wheat (Triticum spp.) and barley (Hordeum spp.) in the world. Yield losses and control costs are valued at several hundred million dollars each year. The use of D. noxia-resistant cultivars is an ecologically, economically, and biologically sound method of managing this pest. Several D. noxia resistance (Dn) genes from wheat have been used to develop cultivars resistant to D. noxia. However, a new U.S. D. noxia biotype (biotype 2) in Colorado is virulent to all known Dn genes except the Dn7 gene from rye (Secale spp.). Hence, there is an immediate need to identify and characterize unique sources of D. noxia resistance to biotypes. In this article, we report resistance to D. noxia biotype 2, identified in a selection from wheat cereal introduction (CItr) 2401, that is controlled by two dominant genes. CItr2401 has a strong antibiosis effect that is exhibited as a reduced intrinsic rate of increase of D. noxia biotype 2. CItr2401 plants also exhibit tolerance to leaf rolling and chlorosis. No antixenosis was detected in CItr2401.
俄罗斯麦蚜，麦二叉蚜（库尔久莫夫）（同翅目：蚜科），是世界上对小麦（小麦属）和大麦（大麦属）危害最大的害虫之一。每年的产量损失和防治成本高达数亿美元。使用抗俄罗斯麦蚜的品种是一种在生态、经济和生物学上合理的害虫管理方法。从小麦中获得的几个抗俄罗斯麦蚜（Dn）基因已被用于培育抗俄罗斯麦蚜的品种。然而，美国科罗拉多州出现的一种新的俄罗斯麦蚜生物型（生物型2），对除黑麦（黑麦属）的Dn7基因外的所有已知Dn基因都具有毒性。因此，迫切需要鉴定和表征对生物型具有独特抗性的俄罗斯麦蚜来源。在本文中，我们报告了从小麦谷物引种（CItr）2401中筛选出的对俄罗斯麦蚜生物型2的抗性，该抗性由两个显性基因控制。CItr2401具有很强的抗生作用，表现为俄罗斯麦蚜生物型2的内禀增长率降低。CItr2401植株还表现出对卷叶和褪绿的耐受性。在CItr2401中未检测到拒避作用。
