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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: Resistance of common bean breeding lines to Phaeoisariopsis griseola isolates from Honduras

Authors
item Rodriguez, Iveth -
item Vargas, A. -
item Rosas, J. -
item Beaver, J. -
item Porch, Timothy

Submitted to: Bean Improvement Cooperative Annual Report
Publication Type: Research Notes
Publication Acceptance Date: January 28, 2014
Publication Date: April 1, 2014
Citation: Rodriguez, I.J., Vargas, A., Rosas, J.C., Beaver, J.S., Porch Clay, T.G. 2014. Resistance of common bean breeding lines to Phaeoisariopsis griseola isolates from Honduras. Bean Improvement Cooperative Annual Report. p. 215-216.

Interpretive Summary: Angular leaf spot (ALS) disease is currently one of the most important factors limiting bean productivity in Central America. The development of breeding lines which combine resistance to ALS and Bean Golden Yellow Mosaic Virus (BGYMV) and tolerance to drought are being developed by breeding programs in Central America. Results from screening for ALS resistance with three different ALS isolates are presented. Of 22 breeding lines evaluated, the breeding lines ALS 0531-97, ALS 0532-6, ALS 532-38 and ALS 546-97 were resistant to all three ALS isolates. These resistant lines can be used as varieties in bean production areas where these two diseases are simultaneously present, and can also be used as breeding parents.

Technical Abstract: Angular leaf spot (ALS) disease caused by Phaeoisariopsis griseola Sacc. Ferraris, is currently one of the most important factors limiting bean productivity in Central America. The development of breeding lines which combine resistance to ALS and Bean Golden Yellow Mosaic Virus (BGYMV) and tolerance to drought are being developed by breeding programs in Central America. Results from screening for ALS resistance with different ALS isolates of a group of advanced common bean breeding lines are presented. The P. griseola isolates used were characterized as pathotypes 31-63 (isolate Pg-ZII), 62-33 (isolate Pg-0) and 63-63 (isolate Pg-PRR), and can be considered as virulent. Of 22 breeding lines evaluated, the breeding lines ALS 0531-97, ALS 0532-6, ALS 532-38 and ALS 546-97 were resistant to all three pathotypes. These resistant lines can be used as cultivars in bean production areas where these two diseases are simultaneously present, and can also be used as breeding parents.

Last Modified: 10/20/2014
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