Comparison of categories of resistance in wheat and barley genotypes against biotype 2 of the Russian wheat aphid, Diuraphis noxia (Kurdjumov) |
| |
Authors: | Said Ennahli Mustapha El Bouhssini Stefania Grando Radhika Anathakrishnan Terutaka Niide Laura Starkus Sharon Starkey C Michael Smith |
| |
Institution: | (1) Department of Horticulture and Crop Science, Ohio State University, OARDC-WOOSTER, Wooster, OH 44691, USA;(2) International Center for Agricultural Research in the Dry Areas, P.O. Box 5466, Aleppo, Syria;(3) Department of Entomology, Kansas State University, Manhattan, KS 66506-4004, USA |
| |
Abstract: | The Russian wheat aphid Diuraphis noxia (Kurdjumov) (Homoptera: Aphididae) is a global pest of wheat and barley. This arthropod is difficult to manage with pesticides
or biological control agents due to the aphid’s ability to seek shelter in rolled leaves and also to develop virulent biotypes.
During the past 20 years, the use of aphid-resistant cereal cultivars has proven to be an economically and ecologically beneficial
method of protecting crops from D. noxia damage. Our research reports the results of experiments to determine the categories of D. noxia biotype 2 resistance present in Cereal Introduction Triticeae (CItr) 2401, and a barley genotype (IBRWAGP4-7), compared to
control resistant and susceptible wheat and barley genotypes. CItr2401 and IBRWAGP4-7 exhibit no antixenosis, but both genotypes
demonstrated antibiosis to D. noxia in the form of reduced aphid populations. Reduced leaf dry weight change, a measure of plant tolerance of D. noxia feeding, was significantly less in CItr2401 and IBRWAGP4-7 plants than in plants of susceptible control varieties. However,
tolerance was negated when a tolerance index was calculated to correct for differences in aphid populations. Barley IBRWAGP4-7
is a new source of D. noxia biotype 2 resistance. D. noxia foliar leaf damage and population growth were significantly less on IBRWAGP4-7 plants than on plants of the susceptible barley
variety Morex. IBRWAGP4-7 plants were equal in resistance to plants of the resistant barley STARS 9301 and wheat genotype
CItr2401.
Handling editor: Heikki Hokkanen |
| |
Keywords: | Antibiosis Antixenosis Barley Diuraphis noxia Tolerance Wheat |
本文献已被 SpringerLink 等数据库收录! |
|