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Article
Open AccessQuantitative trait locus for resistance to the aphid Rhopalosiphum padi L. in barley (Hordeum vulgare L.) is not linked with a genomic region for gramine concentration
Gramine is an indole alkaloid found in certain grass species. Results of previous studies have diverged as to whether this compound might cause resistance to aphids or not. In a breeding program aiming to intr...
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Article
Open AccessIntrogression of resistance to Rhopalosiphum padi L. from wild barley into cultivated barley facilitated by doubled haploid and molecular marker techniques
Long-term pre-breeding using Hordeum vulgare ssp. spontaneum as a donor of bird cherry-oat aphid resistance has resulted in agronomically improved resistance sources of barley along with easy-to-use molecular mar...
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Article
Open AccessA systematic review of rye (Secale cereale L.) as a source of resistance to pathogens and pests in wheat (Triticum aestivum L.)
Wheat is globally one of the most important crops. With the current human population growth rate, there is an increasing need to raise wheat productivity by means of plant breeding, along with development of m...
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Article
The constitutive expression and induction of three β-1,3-glucanases by bird cherry-oat aphid in relation to aphid resistance in 15 barley breeding lines
In this study, 15 closely related barley genotypes were analyzed for the abundance of three β-1,3-glucanase transcripts immediately before and during infestation by the bird cherry-oat aphid (Rhopalosiphum padi L...
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Article
Transcript abundance of resistance- and susceptibility-related genes in a barley breeding pedigree with partial resistance to the bird cherry-oat aphid (Rhopalosiphum padi L.)
Aphids such as the bird cherry-oat aphid (Rhopalosiphum padi L.) are serious pests in agriculture worldwide. Partially resistant barley genotypes have been produced in a breeding program for resistance to R. padi
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Article
Resistance to multiple cereal aphids in wheat–alien substitution and translocation lines
Rhopalosiphum padi, Schizaphis graminum, and Sitobion avenae are three of the most destructive aphid species of wheat (Triticum aestivum L.). They can significantly reduce wheat yields directly b...
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Article
Plant volatile-induced aphid resistance in barley cultivars is related to cultivar age
Recent studies have shown that volatile chemical interaction between certain barley (Hordeum vulgare) cultivars can cause reduced host plant acceptance by the aphid Rhopalosiphum padi, and that certain cultivars ...
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Chapter
Volatile Interactions Between Undamaged Plants: Effects and Potential for Breeding Resistance to Aphids
Various theories about why vegetational diversity may affect herbivore abundance have been put forward over the years. In this chapter, we discuss one possible mechanism that has not been widely studied, invol...
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Article
Impact of herbivory and pollination on performance and competitive ability of oilseed rape transformed for pollen beetle resistance
Competitive ability of transgenic oilseed rape transformed with a pea lectin gene was estimated by comparisons of its performance when grown in a mixture with its non-transgenic counterpart and when grown sing...
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Article
Microarray analysis of the interaction between the aphid Rhopalosiphum padi and host plants reveals both differences and similarities between susceptible and partially resistant barley lines
The bird cherry-oat aphid (Rhopalosiphum padi L.) is an important pest on cereals causing plant growth reduction without specific leaf symptoms. Breeding of barley (Hordeum vulgare L.) for R. padi resistance show...
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Article
Pea Lectin Expressed Transgenically in Oilseed Rape Reduces Growth Rate of Pollen Beetle Larvae
In several studies plant lectins have shown promise as transgenic resistance factors against various insect pests. We have here shown that pea seed lectin is a potential candidate for use against pollen beetle...
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Article
Does Indole Alkaloid Gramine Confer Resistance in Barley to Aphid Rhopalosiphum Padi?
Accessions of cultivated barley (Hordeum vulgare ssp. vulgare) and its wild progenitor Hordeum vulgare ssp. spontaneum (H. ssp. spont.) were screened for gramine content at the seedling stage. H. ssp. spont. gene...
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Article
Growth, herbivory and disease in relation to gender in Salix viminalis L.
Many species of dioecious plants show sex-related differences in growth rate and rates of attack by various herbivores and diseases. The common pattern is for males to grow faster than females and to be less ...
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Chapter
Insect Resistance with Special Reference to Mustard Aphid
Cruciferous oilseeds are attacked by a large number of insect pests (Lamb 1989). Blossom beetles, Meligethes spp., and other species of Coleoptera like Psylliodes chrysocephala and Ceutorhynchus spp. are severe p...
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Chapter and Conference Paper
Selection for resistance to insects causing ramification in Salix viminalis plantations
During the mid 1980ies a breeding program was started in Sweden to improve yield, resistance to pests and diseases, and frost tolerance in a new type of crop, Salix viminalis L. grown to produce biomass for fuel....
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Article
Effects of plant odor on oviposition by the black swallowtail butterfly,Papilio polyxenes (Lepidoptera: Papilionidae)
Black swallowtail females laid more eggs on plant models treated with contact stimulants and volatiles from carrot leaves than on models treated only with contact stimulants. The volatiles enhanced landing rat.....
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Article
Toxicities of host secondary compounds to eggs of theBrassica specialistDasineura brassicae
The toxicities of selected host secondary plant substances to eggs of theBrassica specialistDasineura brassicae were estimated in a laboratory test. Isothiocyanates (ITCs) and 1-cyano-2-phenylethane, autolysis pr...
