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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: 5305-21220-005-16
Project Type: Reimbursable

Start Date: Oct 01, 2013
End Date: Aug 27, 2015

Objective:
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.

Approach:
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: 10/1/2014
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