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United States Department of Agriculture

Agricultural Research Service

Research Project: Enhanced Disease and Abiotic Stress Resistance in Edible Legumes

Location: Vegetable and Forage Crops Production Research

Title: Identification of QTL for drought tolerance and characterization of extreme phenotypes in the Buster x Roza mapping population

Authors
item Trapp, Jennifer -
item Urrea, Carlos -
item Cregan, Perry
item Miklas, Phillip

Submitted to: Bean Improvement Cooperative Annual Report
Publication Type: Proceedings
Publication Acceptance Date: February 11, 2014
Publication Date: March 1, 2014
Citation: Trapp, J., Urrea, C., Cregan, P.B., Miklas, P.N. 2014. Identification of QTL for drought tolerance and characterization of extreme phenotypes in the Buster x Roza mapping population. Bean Improvement Cooperative Annual Report. 57: 87-88.

Interpretive Summary: Terminal and intermittent drought limits dry bean production worldwide.The Buster/Roza mapping population (140 F7:9 RILs) has been screened for drought tolerance across multiple years/locations. In 2011 and 2012 the RILs were tested for terminal drought response at two locations: Othello, WA and Scottsbluff, NE. The population segregated for yield response at both locations under low to moderate drought stress (data not shown). This population was sent to Dr. Perry Cregan, USDA-ARS, for genotyping (Illumina GoldenGate) and the resulting SNP data combined with 9 location-years of phenotypic data was used to search for QTL associated with drought and multiple stresses including drought. QTL have been identified for yield response under stress and further characterization of the differential response to drought among RILs representing phenotypic extremes has been initiated.

Technical Abstract: Terminal and intermittent drought limits dry bean production worldwide.The Buster/Roza mapping population (140 F7:9 RILs) has been screened for drought tolerance across multiple years/locations. In 2011 and 2012 the RILs were tested for terminal drought response at two locations: Othello, WA and Scottsbluff, NE. The population segregated for yield response at both locations under low to moderate drought stress (data not shown). This population was sent to Dr. Perry Cregan, USDA-ARS, for genotyping (Illumina GoldenGate) and the resulting SNP data combined with 9 location-years of phenotypic data was used to search for QTL associated with drought and multiple stresses including drought. QTL have been identified for yield response under stress and further characterization of the differential response to drought among RILs representing phenotypic extremes has been initiated.

Last Modified: 9/22/2014
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