A necrotic strain of bean common mosaic virus found in southwestern Ontario

By:

Tu, J.C

Material type: Article

ArticleLanguage: English Description: 29:66-67Subject(s): LOC classification:

27736

In: Bean Improvement Cooperative. Annual Report (USA)Summary: Se realizaron expt. para determinar si en Ontario, Canada, existe una cepa necrotica de BCMV. Se colectaron hojas de plantas Sanilac con sintomas de mosaico y necrosis de las nervaduras y se inocularon en plantas Sanilac cultivadas en invernadero. Las reacciones a la enfermedad se observaron a los 10 dias de la inoculacion. Con base en las reacciones diferenciales de la planta hospedante, el nuevo aislamiento necrotico se determino como raza NL-8 de BCMV. Esta nueva cepa difiere de la NL-3, registrada en Michigan: causa necrosis de las nervaduras en las hojas inoculadas y necrosis severa del apice en los cv. de Ontario que tengan el gen I. Se necesita urgentemente un programa de mejoramiento para incorporar el gen bc2(2) al cv. con el gen I para mitigar la reaccion hipersensitiva causada por el gen resistente I. (CIAT)Summary: Expt. were conducted to determine whether a necrotic strain of BCMV exists in Ontario, Canada. Leaves of Sanilac plants showing mosaic and vein necrosis were collected and inoculated to greenhouse-grown Sanilac plants. Disease reactions were observed 10 days after inoculation. Based on the differential host reactions, the new necrotic isolate was determined to be race NL-8 of BCMV. This new strain differs from strain NL-3 reported in Michigan; it causes veinal necrosis on inoculated leaves and severe tip necrosis of Ontario cv. which carry the I gene. A breeding program to incorporate bc2(2) gene into the cv. with the I gene is urgently needed to alleviate the hypersensitive reaction caused by the resistant I gene. (CIAT)

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Holdings
Item type	Current library	Collection	Call number	Copy number	Status	Date due	Barcode	Item holds
Journal Article	CIAT Library Document collection CINFOS	Document Collection CINFOS	27736 (Browse shelf(Opens below))	c.1	Short Loan		100062677

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Se realizaron expt. para determinar si en Ontario, Canada, existe una cepa necrotica de BCMV. Se colectaron hojas de plantas Sanilac con sintomas de mosaico y necrosis de las nervaduras y se inocularon en plantas Sanilac cultivadas en invernadero. Las reacciones a la enfermedad se observaron a los 10 dias de la inoculacion. Con base en las reacciones diferenciales de la planta hospedante, el nuevo aislamiento necrotico se determino como raza NL-8 de BCMV. Esta nueva cepa difiere de la NL-3, registrada en Michigan: causa necrosis de las nervaduras en las hojas inoculadas y necrosis severa del apice en los cv. de Ontario que tengan el gen I. Se necesita urgentemente un programa de mejoramiento para incorporar el gen bc2(2) al cv. con el gen I para mitigar la reaccion hipersensitiva causada por el gen resistente I. (CIAT) spa

Expt. were conducted to determine whether a necrotic strain of BCMV exists in Ontario, Canada. Leaves of Sanilac plants showing mosaic and vein necrosis were collected and inoculated to greenhouse-grown Sanilac plants. Disease reactions were observed 10 days after inoculation. Based on the differential host reactions, the new necrotic isolate was determined to be race NL-8 of BCMV. This new strain differs from strain NL-3 reported in Michigan; it causes veinal necrosis on inoculated leaves and severe tip necrosis of Ontario cv. which carry the I gene. A breeding program to incorporate bc2(2) gene into the cv. with the I gene is urgently needed to alleviate the hypersensitive reaction caused by the resistant I gene. (CIAT) eng