NDLI: Genetic Resistances to Potato Leafroll Virus, Potato Virus Y, and Green Peach Aphid in Progeny ofSolanum etuberosum

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Genetic Resistances to Potato Leafroll Virus, Potato Virus Y, and Green Peach Aphid in Progeny ofSolanum etuberosum

Content Provider	Springer Nature Link
Author	vy, R. G. Nasruddin, A. Ragsdale, D. W. Radcliffe, E. B.
Copyright Year	2002
Abstract	Increasing prevalence of potato leafroll virus (PLRV) and potato virus Y (PVY) has been reported in seed and commercial potato production, resulting in the rejection of potatoes for certification and processing. Host plant resistance to PLRV and PVY and their primary vector, green peach aphid,Myzus persicae, could limit the spread of these viruses. Host plant resistance to PLRV, PVY, and green peach aphid has been identified in non-tuber-bearingSolanum etuberosum (PI 245939) and in its backcross 2 (BC$_{2}$) progeny. Resistance to green peach aphid involved a reduction in fecundity and adult aphid size. In addition, one BC$_{2}$ individual was identified as possessing a genetic factor that was detrimental to nymph survival. PVY resistance was identified in all five BC$_{2}$ progenies evaluated in a field screening under intense virus pressure. PLRV resistance was identified in two of the five BC$_{2}$ progeny. This resistance was stable in field and cage evaluations with large populations of viruliferous aphids. Based on the segregation of virus resistances in the BC$_{2}$ , PVY and PLRV resistances appear to result from the action of independent genetic mechanisms that reduce the levels of primary and secondary virus infection. Two BC$_{2}$ individuals, Etb 6-21-3 and Etb 6-21-5 were identified as having multiple resistances to PLRV, PVY, and green peach aphid derived fromS. etuberosum. This germplasm could prove useful to potato breeders in the development of virus-resistant cultivars.EI incremento en la prevalencia del virus del enrollamiento de la hoja de papa (PLRV) y del virus Y de la papa (PVY) ha sido reportado tanto en las semillas como en la producción comercial de papa, lo que conlleva al rechazo de las mismas durante las fases de certificación y procesamiento. La resistencia de la planta hospedante al PLRV y al PVY y su principal vector, el pulgón verde,Myzus persicae, podría limitar el esparcimiento de esos virus. Se ha identificado resistencia de la planta hospedante al PLRV, al PVY y al pulgón verde enSolanum etuberosum (PI 245939) no tuberizados y en su progenie 2 (BC$_{2}$) de retrocruzamiento. La resistencia al pulgón verde implicó una reducción en la fecundidad y tamaño del pulgón adulto. Adicionalmente, se identificó un BC$_{2}$ individual que posee un factor genético perjudicial para la sobrevivencia de las ninfas. La resistencia al PVY se identificó en las cinco progenies BC$_{2}$ evaluadas en un campo de prueba bajo intensa presión del virus. Se identificó resistencia al PLRV en dos de las cinco progenies BC$_{2}$. Esta resistencia fue estable en el campo y en evaluaciones en jaula con una alta población de pulgones virulentos. Basados en la segregación de resistencia a virus del BC$_{2}$, las resistencias al PVY y al PLRV parecen ser resultado de la acción de mecanismos genéticos independientes que reducen los niveles primarios y secundarios de la infección viral. Se identificaron dos BC$_{2}$ individuales, Etb 6-21-3 y Etb 6-21-5, con resistencia múltiple al PLRV, PVY y pulgón verde derivada deS. etuberosum. Este germoplasma podría ser útil para los mejoradores que desarrollan cultivares resistentes al virus.
Starting Page	9
Ending Page	18
Page Count	10
File Format	PDF
ISSN	1099209X
Journal	American Potato Journal
Volume Number	79
Issue Number	1
e-ISSN	18749380
Language	English
Publisher	Springer-Verlag
Publisher Date	2002-01-01
Publisher Institution	Potato Association of America
Publisher Place	New York
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Life Sciences Plant Sciences Animal Genetics and Genomics Agriculture Plant Physiology Plant Pathology
Content Type	Text
Resource Type	Article
Subject	Plant Science Agronomy and Crop Science

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