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United States Department of Agriculture

Agricultural Research Service

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Research Project: Development of Slow-Bolting Iceberg and Romaine Cultivars for Desert Production Areas

Location: Crop Improvement and Protection Research

Project Number: 2038-21220-005-16-R
Project Type: Reimbursable Cooperative Agreement

Start Date: Oct 1, 2013
End Date: Mar 11, 2015

Develop slow bolting (stem elongation that culminates with flowering) lettuce cultivars and identify quantitative trait loci (QTL) and QTL x environment interactions controlling the time to initiation of bolting. A long-term goal is to develop a comprehensive understanding of the genetic basis of bolting and the environmental dependence of bolting in lettuce.

Field, greenhouse, and growth chamber experiments in diverse environments will be used to assess segregation for days-to-flower and core-length in at least two recombinant inbred line (RIL) populations. Segregation data will be used with existing genetic maps for these RIL populations to detect QTL and QTL x environmental interactions. Segregation in new populations will be evaluated, and populations with interesting segregation will be genotyped with molecular markers for eventual QTL analysis.

Last Modified: 10/16/2017
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