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VARIABILITY AMONG APHID CLONES OF RHOPALOSIPHUM PADI L. AND SITOBION AVENAE FABR. (HOMOPTERA: APHIDIDAE) IN TRANSMISSION OF THREE PAV ISOLATES OF BARLEY YELLOW DWARF VIRUSES

Published online by Cambridge University Press:  31 May 2012

Jing-Quan Guo ,
Jean-Pierre Moreau  and
Hervé Lapierre
Jing-Quan Guo
Affiliation:
Station de Zoologie, INRA, Centre de Versailles, Route de St-Cyr, 78026 Versailles cédex, France
Jean-Pierre Moreau
Affiliation:
Station de Zoologie, INRA, Centre de Versailles, Route de St-Cyr, 78026 Versailles cédex, France
Hervé Lapierre
Affiliation:
Station de Pathologie Végétale, INRA, Centre de Versailles, Route de St-Cyr, 78026 Versailles cédex, France
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Abstract

Variability in vectoring efficiency among six clones of Rhopalosiphum padi L. and five clones of Sitobion avenae Fabr. in transmission of three French PAV isolates (PAV-RG, PAV-2t, and PAV-13t) of barley yellow dwarf viruses (BYDVs) on seedlings of barley (Hordeum vulgare L.) cv. Plaisant was determined. All the clones could transmit these three isolates, but their vectoring efficiency was significantly different: 91% and 56% transmission efficiencies were obtained from the most efficient clones (Rp-M and Sa-R1) but only 21% and 9% from the least efficient clones (Rp-R26 and Sa-V) with 5-day acquisition and inoculation access periods (AAP, IAP). A significant difference in overall transmission between apterous adults and winged aphids of the tested clones was also found. In most cases, apterous adults were more efficient than were winged aphids. The overall transmission efficiency of apterous adults was 1.5 and 1.7 times that of winged ones for R. padi and S. avenae, respectively. The transmissibility of PAV-RG and PAV-2t isolates was similar within each of the tested aphid clones, but that of the PAV-13t isolate differed, particularly for the poorly efficient vector clones of S. avenae. Temperature could significantly influence the vectoring efficiency of the tested clones of R. padi, but the influence was greater on Rp-R26. High temperature (25 °C) facilitated more transmission than did low temperature (14 °C), and high temperature for AAP played a more important role than it did for IAP.

Résumé

La variabilité de la capacité vectrice de deux espèces de pucerons, en utilisant six clones de Rhopalosiphum padi L. et cinq clones de Sitobion avenae Fabr. collectés dans diverses localités françaises, a été démontrée par des essais de transmission en conditions contrôlées de trois isolats du PAV (PAV-RG, PAV-2t et PAV-13t) de la jaunisse nanisante de l’orge à des plantules d’Hordeum vulgare L. cultivar Plaisant. Tous les clones ont pu transmettre ces isolats, mais avec des capacités vectrices significativement différentes. Avec les clones les plus performants, Rp-M et Sa-R1, on a obtenu 91% et 56% d’efficacité de transmission des trois isolats. A l’opposé, les clones les moins efficaces, Rp-R26 et Sa-V, n’ont transmis qu’à 21% et 9% respectivement. On a constaté, entre adultes ailés et aptères, des différences significatives de transmission des isolats. Dans la plupart des cas, les aptères se sont montrés plus efficaces que les ailés. Globalement, et pour les espèces de R. padi et S. avenae respectivement, le taux de transmission par les aptères a été de 1.5 et 1.7 fois supérieur à celui des ailés. La transmissibilité des isolats PAV-RG et PAV-2t a été semblable avec chacun des clones testés, mais l’isolt’ PAV-13t a été parfois moins transmis, surtout par les clones moins efficaces de S. avenae. La température a joué un rôle significatif dans la capacité vectrice des clones Rp-M et Rp-R26 de R. padi, mais sont influence s’est montrée encore plus nette pour le clone Rp-R26. Une température de 25 °C a conduit à un taux de transmission plus important qu’à 14 °C. Cet effet a été plus net sur la période d’acquisition que sur la période d’inoculation.

Type
Articles
Information
The Canadian Entomologist , Volume 128 , Issue 2 , April 1996 , pp. 209 - 217
Copyright
Copyright © Entomological Society of Canada 1996

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