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ARS Home » Southeast Area » Mayaguez, Puerto Rico » Tropical Crops and Germplasm Research » Research » Publications at this Location » Publication #349499

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

Location: Tropical Crops and Germplasm Research

Title: Identification of resistance sources of common bean (Phaseolus vulgaris L.) to angular leaf spot (Pseudocercospora griseola)”

Author
item RODRIGUEZ, DIEGO - National Institute For Agricultural Research (INIAP)
item BEAVER, JAMES - University Of Puerto Rico
item ESTEVEZ DE JENSEN, CONSUELO - University Of Puerto Rico
item Porch, Timothy - Tim

Submitted to: Revista Facultad Nacional de Agronomia Medellin
Publication Type: Peer Reviewed Journal
Publication Acceptance Date: 3/8/2019
Publication Date: 5/1/2019
Citation: Rodriguez, D., Beaver, J., Estevez De Jensen, C., Porch, T.G. 2019. Identification of resistance sources of common bean (Phaseolus vulgaris L.) to angular leaf spot (Pseudocercospora griseola)”. Revista Facultad Nacional de Agronomia Medellin. 72(2):8785-8791.

Interpretive Summary: Common bean is the most important edible grain legume in the world and is an important source of income for farmers and food for millions of families. Angular leaf spot (ALS), caused by the fungus, is one of the most important diseases in the production of common bean with the potential to cause significant seed yield losses. An effective and environmentally friendly alternative to control this disease is the use of improved varieties that combine resistance genes of Andean and Mesoamerican origin. In this study, the response of 181 bean genotypes to two angular spot isolates was evaluated. A total of 16 lines were identified to have resistance to both races. The resistant lines include the Andean breeding lines CAL 143, AND 277 and the Mesoamerican cultivar ‘Ouro Negro’ that possess respectively the resistance genes Phg-5, Phg-1, Phg-3. The results of this study improve the understanding of and adds sources of resistance to angular leaf spot.

Technical Abstract: Common bean (Phaseolus vulgaris L.) is the most important edible grain legume in the world and is an important source of income for farmers and food for millions of families. Angular leaf spot (ALS), caused by the fungus Pseudocercospora griseola (Sacc.) Ferraris, is one of the most important diseases in the production of common bean with the potential to cause significant seed yield losses. An effective and environmentally friendly alternative to control this disease is the use of improved varieties that combine resistance genes of Andean and Mesoamerican origin. In this study, the response of 181 bean genotypes to two angular spot isolates (races 61:11 and 63:51) was evaluated. A total of 16 lines were identified to have resistance to both races. The resistant lines include the Andean breeding lines CAL 143, AND 277 and the Mesoamerican cultivar ‘Ouro Negro’ that possess respectively the resistance genes Phg-5, Phg-1, Phg-3. The results of this study improve the understanding of and adds sources of resistance to angular leaf spot.