NDLI: Level and genetic variability of resistance to the colorado potato beetle (leptinotarsa decemlineata (say)) in wild solarium species

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Level and genetic variability of resistance to the colorado potato beetle (leptinotarsa decemlineata (say)) in wild solarium species

Content Provider	Springer Nature Link
Author	Pelletier, Yvan
Copyright Year	2007
Abstract	Crop resistance to insects is a preferred approach of the agriculture industry and could play an important role in the development of an integrated pest management strategy, having a reduced environmental footprint. The resistance to the Colorado potato beetle for six accessions of wild Solanum species [S. acroglossum (PI 498204), 5. chomatophilum (PI 310991 and PI 365325), S. paucissectum (PI 365340), S. piurae (PI 473501), and 5. tarnii (PI 498044)] was evaluated using a field test. The population density of the Colorado potato beetle was lower on the Solanum accessions compared to potato, and highest on S. piurae where defoliation reached 20%, compared to less than 10% with the other Solanum species and 80% with potato. Factor analysis was used to extract information from the field data on the mode of resistance and the genetic variability within accessions. All accessions had a low score for the “colonisation” factor, an indication of the presence of a factor deterring the adults and interfering with colonisation. The score for the “large larvae” factor was also low and could be due to the presence of factors reducing the development of the larvae. The analysis of the genotypic variance for each accession indicated the absence of variability for resistance to the Colorado potato beetle within an accession. This study provided the first information on the level of resistance to the Colorado potato beetle for three of the wild Solanum accessions studied. It demonstrated that all the accessions except S. piurae (PI 473501) were highly resistant to the Colorado potato beetle. It provided some indication that the mode of resistance involves interference with colonisation of the plant by adults. Finally, it demonstrated the general lack of genetic variability within accessions for resistance to the Colorado potato beetle.La resistencia del cultivo a los insectos es el enfoque preferido por la industria agrícola y podría jugar un rol importante en el desarrollo de una estrategia de manejo integrado de plagas que tenga una reducida influencia sobre el medio ambiente Se evaluó la resistencia al escarabajo de Colorado de la papa de seis accesiones silvestres de Solanum [S. acroglossum (PI 498204), S. chomatophilum (PI 310991 y PI 365325), 5. paucissectum (PI 365340), S. piurae (PI 473501) y 5. tarnii (PI 498044)]. La densidad pobla-cional del escarabajo de Colorado de la papa fue más baja sobre accesiones de Solanum en comparación con papa y más alta sobre 5. piurae, donde la defoliaciön alcanzö el 20% comparada con menos del 10% en otras especies de Solanum y 80% en papa. Se utilizö el análisis factorial para extraer informaciön de campo sobre la forma de resistencia y variabilidad genética entre accesiones. Todas las accesiones alcanzaron un puntaje bajo para el factor de “colonizacion,” indicaciön de la presencia de un factor de impedimento para adultos e interferencia con la colonizaciön. El puntaje para el factor “larva grande”, tambien fue bajo y puede ser debido a la presencia de factores que reducen el desarrollo de las larvas. El análisis de variaciön genotípica para cada accesiön indicö la ausencia de resistencia al escarabajo dentro de una misma accesiön. Este estudio proporcionö la primera informaciön sobre el nivel de resistencia al escarabajo de Colorado de la papa para tres de las accesiones silvestres de Solanum estudiadas. Demoströ que todas las accesiones, con excepciön de S. piurae (PI 473501) fueron altamente resistentes al escarabajo. También proporcionö cierta indicaciön del modo de resistencia que involucra interferencia con la colonizatiön de la planta por adultos. Finalmente demostro la ausencia de variabilidad genética dentro de las accesiones para resistencia al escarabajo de Colorado de la papa.
Starting Page	143
Ending Page	148
Page Count	6
File Format	PDF
ISSN	1099209X
Journal	American Potato Journal
Volume Number	84
Issue Number	2
e-ISSN	18749380
Language	English
Publisher	Springer-Verlag
Publisher Date	2007-01-01
Publisher Institution	Potato Association of America
Publisher Place	New York
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Plant Sciences Agriculture Plant Genetics & Genomics Plant Breeding/Biotechnology Plant Pathology
Content Type	Text
Resource Type	Article
Subject	Plant Science Agronomy and Crop Science

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