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您的检索式：作者名="Gregory M.Loeb"
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| 1 | A QTL associated with leaf trichome traits has a major influence on the abundance of the predatory mite Typhlodromus pyri in a hybrid grapevine population显示文摘The abundance of predatory phytoseiid mites,Typhlodromus pyri,important biological control agents of spider mite pests in numerous crops,is positively influenced by the density of leaf trichomes and tuft-form domatia in vein axils.Identification of the genetic regions controlling both trophic levels could facilitate the improvement of predatory mite habitat in breeding programs.The abundance of T.pyri and non-glandular trichomes was measured in a segregating F1 family derived from the cross of the complex Vitis hybrid,‘Horizon’,with Illinois 547-1(V.rupestris B38×V.cinerea B9),finding positive correlation among traits.High density genetic maps were used to localize one major quantitative trait locus(QTL)on chromosome 1 of Illinois 547-1 associated with both predatory mite abundance and leaf trichomes.This QTL explained 23%of the variation in phytoseiid abundance and similar amounts of variance in domatia rating(21%),domatia size(16%),leaf bristle density(37%in veins and 33%in blades),and leaf hair density(20%in veins and 15%in blades).Another nine QTL distributed among chromosomes 1,2,5,8,and 15 were associated solely with trichome density,and explained 7–17%of the phenotypic variation.Combined,our results provide evidence of the genetic architecture of non-glandular trichomes in Vitis,with a major locus influencing trichome densities,domatia size and predatory mite abundance.This information is relevant for breeding grapevines with a more favorable habitat for biological control agents. | Paola Barba Rebecca Loughner Karen Wentworth Jan Peter Nyrop Gregory M.Loeb Bruce I.Reisch | 2019 | Horticulture Research2019，6，1： | 1 |
| 2 | Behavioral evidence for contextual olfactory-mediated avoidance of the ubiquitous phytopathogen Botrytis cinerea by Drosophila suzukii显示文摘Herbivorous insects may benefit from avoiding the smell produced by phytopathogens infecting plant host tissue if the infected tissue reduces insect fitness.However,in many cases the same species of phytopathogen can also infect host plant tissues that do not directly affect herbivore fitness.Thus,insects may benefit from differentiating between pathogen odors emanating from food and nonfood tissues.This is based on the hypothesis that unecessarily staying attentive to pathogen odor from nonfood tissue may incur opportunity costs associated with not responding to other important survival functions.In this study adults of Drosophila suzukii Matsumura,an invasive larval frugivore,showed reduced attraction to the odor of raspberry fruit,a food tissue,when infected with Botrytis cinerea Pers.,a ubiquitous phytopathogen,in favor of odors of uninfected raspberry fruit.Moreover,D.suzukii oviposited fewer eggs on infected raspberry fruit relative to uninfected raspberry fruit.Larval survival and adult size after eclosion were significantly reduced when reared on B.cinerea-infected raspberry relative to uninfected fruit.Interestingly,when the behavioral choice experiment was repeated using Botrytis-infected vsuninfected strawberry leaves,a nonfood tissue,in combination with fresh raspberry fruit,odor from B.cinerea-infected leaves did not reduce D.suzukii attraction to raspberries rel-ative to raspberries with uninfected leaves.These behavioral results illustrate the important role context can play in odor-mediated interactions between insects,plants and microbes.We discuss implications of our findings for developing a repellent that can be useful for the management of D.suzukii. | Dong H.Cha Stephen P.Hesler Gabrielle Brind'Amour Karen S.Wentworth Sara Villani Kerik D.Cox Matthew T.Boucher Anna Wallingford Shinyoung K.Park Jan Nyrop Gregory M.Loeb | 2020 | Insect Science2020，27，4： | 0 |
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