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ARS Home » Southeast Area » Mayaguez, Puerto Rico » Tropical Crops and Germplasm Research » Research » Publications at this Location » Publication #313320

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

Location: Tropical Crops and Germplasm Research

Title: Advances in the Breeding and Genetics of Heat Tolerance to Alleviate the Effects of Climate Change, with a Focus on Common Bean

Author
item Porch, Timothy - Tim
item Linares Ramirez, Angela
item Rosas, Juan Carlos - Escuela Agricola Panamericana
item Santana, Damaris - University Of Puerto Rico
item Hart, John
item Griffiths, Phillip - Cornell University - New York
item Beaver, James - Agricultural Experiment Station, Puerto Rico

Submitted to: Plant and Animal Genome Conference
Publication Type: Abstract Only
Publication Acceptance Date: 11/1/2014
Publication Date: N/A
Citation: N/A

Interpretive Summary:

Technical Abstract: Crop plants are broadly sensitive to high ambient temperatures during reproductive development while breeding efforts are helping to alleviate the impact of heat stress. Common bean, Phaseolus vulgaris L., is sensitive to moderately high ambient temperature, where temperatures greater than 25C have adverse effects on reproductive development. Some marginal production areas have already reached these temperatures, while climate change will increase the proportion of the production area under heat stress. Simulations indicate that in some common bean producing countries, increasing temperatures will reduce seed yield by 2030. Field experiments under high ambient temperatures are effective for selection of heat tolerance, and reveal sensitivity to heat during male reproductive development, including the response of pollen shed and pollen viability. The progress in elucidating the genetics of response to high ambient temperature stress using genotyping-by-sequencing and association mapping analysis will be presented. Significant advances in developing heat tolerant dry bean and snap bean cultivars have been achieved, contributing to the increase in common bean yields in regions such as Central America. Potential limits to the physiological heat tolerance in common bean may necessitate the introgression of tolerance from, or the production of alternative legume species, such as tepary bean (Phaseolus acutifolius), in areas of excessive heat stress.