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United States Department of Agriculture

Agricultural Research Service

Research Project: Genetic Enhancement of Common Bean Using Exotic Germplasm for Biotic and Abiotic Stress Tolerance

Location: Tropical Crops and Germplasm Research

Title: Evaluation of the tepary bean (Phaseolus acutifolius) CIAT germplasm collection for response to common bacterial blight and bean common mosaic necrosis virus

Authors
item Vargas, A. -
item Porch, Timothy
item Beaver, J.S. -

Submitted to: Bean Improvement Cooperative Annual Report
Publication Type: Research Notes
Publication Acceptance Date: January 10, 2014
Publication Date: April 1, 2014
Citation: Vargas, A., Porch Clay, T.G., Beaver, J. 2014. Evaluation of the tepary bean (Phaseolus acutifolius) CIAT germplasm collection for response to common bacterial blight and bean common mosaic necrosis virus. Bean Improvement Cooperative Annual Report. p. 181-182.

Interpretive Summary: Viruses and common bacterial blight (CBB) cause production losses in common and tepary beans. Developing resistance to viruses, specifically BCMV, BCMNV and BGYMV, will be critical for expanding tepary bean production. This study evaluated the response of 207 accessions of tepary bean from the CIAT tepary collection to BCMNV and to common bacterial blight. Resistance to BCMNV was identified in a few accessions. A large range of response to CBB was found, with the collection skewed for resistance. BCMV and CBB resistance is being incorporated in tepary breeding lines to improve production of this orphan crop.

Technical Abstract: Aphid-transmitted Bean Common Mosaic Necrosis Virus (BCMNV) and Bean Common Mosaic Virus (BCMV) are potyvirus that cause production losses in common and tepary beans. Developing resistance to viruses, specifically BCMV, BCMNV and BGYMV, will be critical for expanding tepary bean production. This study evaluated the response of 207 accessions of tepary bean from the CIAT tepary collection to BCMNV and to common bacterial blight (CBB), caused by Xanthomonas axonopodis pv. phaseoli (Xap). Veinal necrosis and local pinpoint necrotic lesions were identified as a response to BCMNV. A large range of response to CBB was found, with the collection skewed for resistance. Populations have been generated for the study of the genetics of BCMV and CBB response in tepary bean. BCMV and CBB resistance is also being incorporated in breeding lines.

Last Modified: 11/28/2014
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