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United States Department of Agriculture

Agricultural Research Service

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Research Project: Next-Generation Lettuce Breeding: Genes to Growers

Location: Crop Improvement and Protection Research

Project Number: 2038-21220-005-02
Project Type: Reimbursable

Start Date: Sep 01, 2010
End Date: Aug 31, 2015

Objective:
To determine the inheritance of field resistance to downy mildew, tipburn resistance, sclerotinia resistance, and shelf-life in multiple genetic mapping populations. To identify sources of physiological resistance to sclerotinia. To develop genetically improved lines of lettuce for downy mildew resistance, sclerotinia resistance, tipburn resistance, and shelf-life.

Approach:
The research to be conducted involves developing and analyzing multiple recombinant inbred line populations (RILs) to identify genes and QTL for field resistance to downy mildew, scelertinia resistance, tip burn resistance and extended shelf-life. The RILS wil be evaluated in field and greenhouse experiments, genotyped with molecular marker, analyzed to determine the inheritance traits, and markers suitable for markers assisted selection will also be developed. There is also research to develop improved in vitro and greenhouse methods for sclerotinia resistance.

Last Modified: 11/27/2014
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