Strains of Soybean Mosaic Virus: Aphid Transmission, Host Passage Effects, and Use in Evaluation of Genetic Resistance in Soybeans
Cho, Eui Kyoo
This item is only available for download by members of the University of Illinois community. Students, faculty, and staff at the U of I may log in with your NetID and password to view the item. If you are trying to access an Illinois-restricted dissertation or thesis, you can request a copy through your library's Inter-Library Loan office or purchase a copy directly from ProQuest.
Permalink
https://hdl.handle.net/2142/67454
Description
Title
Strains of Soybean Mosaic Virus: Aphid Transmission, Host Passage Effects, and Use in Evaluation of Genetic Resistance in Soybeans
Author(s)
Cho, Eui Kyoo
Issue Date
1981
Department of Study
Plant Pathology
Discipline
Plant Pathology
Degree Granting Institution
University of Illinois at Urbana-Champaign
Degree Name
Ph.D.
Degree Level
Dissertation
Keyword(s)
Agriculture, Plant Pathology
Language
eng
Abstract
Seven soybean mosaic virus (SMV) strains proved to be aphid transmissible, however, one isolate of strain G5 lost its aphid transmissibility after about 30 successive passages by sap inoculation through a susceptible soybean cultivar Rampage during 20 months. The aphid nontransmissible strain G5 (designated NG5) was used to study the mechanism of aphid nontransmissibility.
NG5 was not transmitted from sequential acquisition access experiments when SMV strains G3 or G4 or potato virus Y (PVY) was used as a possible helper source. NG5 was transmitted, however, from plants doubly infected with SMV strain G3 or G4 and NG5.
Five aphid species Aphis citricola, A. craccivora, Myzus persicae, Rhopalosiphum maidis, and R. padi were able to transmit a single isolate representing each of the seven SMV strains except that the isolate of strain G3 was not transmitted or was very inefficiently transmitted by R. maidis and R. padi. Field spread of four selected SMV strains G2, G3, G6 and G7 was studied, and the spread of the G6 was significantly greater than that of the others.
Forty six soybean entries reported to be resistant to SMV were evaluated for reactions to seven SMV strains. Among them, six soybean lines were found to be resistant to all seven SMV strains used. Reaction types for the other entries were similar to one of the five soybean differentials (Suweon 97, Buffalo, Kwanggyo, Davis, and Ogden).
Variability in virulence of SMV strains has been observed in greenhouse studies during maintenance of the virus by sap inoculations. My results show that pathogenic variants of SMV strains can be obtained by host passage effects.
Use this login method if you
don't
have an
@illinois.edu
email address.
(Oops, I do have one)
IDEALS migrated to a new platform on June 23, 2022. If you created
your account prior to this date, you will have to reset your password
using the forgot-password link below.
