Page Banner

United States Department of Agriculture

Agricultural Research Service

Research Project: IDENTIFYING QTL FOR CHILLING REQUIREMENT, COLD TOLERANCE, AND FRUIT QUALITY TRAITS IN TETRAPLOID HIGHBUSH BLUEBERRY, VACCINIUM CORYMBOSUM

Location: Genetic Improvement of Fruits and Vegetables

2009 Annual Report


1a.Objectives (from AD-416)
The overall research goal is to identify QTL associated with chilling requirement, cold tolerance, and various fruit quality traits in the tetraploid highbush blueberry (V. corymbosum) mapping population developed by Michigan State University.


1b.Approach (from AD-416)
A tetraploid highbush blueberry (V. corymbosum) mapping population, derived from a cross between the northern highbush cultivar ‘Draper’ and the southern highbush cultivar ‘Jewel’, will be used for identifying QTL associated with chilling requirement, cold tolerance, and various fruit quality traits. The population will be propagated, planted, and evaluated for these traits at various locations, including Florida, Georgia, Oregon, and Michigan, over two years. EST-SSR and EST-PCR markers will be developed from blueberry ESTs and added to the current map of this population. QTL associated with chilling requirement, cold tolerance, and various fruit quality traits will be identified using appropriate software designed for mapping quantitative traits in tetraploid populations.


3.Progress Report

The purpose of this agreement is to distribute part of the funds from a CSREES-funded Specialty Crop Research Initiative (SCRI) project entitled “Generating Genomic Tools for Blueberry Improvement” to the Co-PI at Michigan State University. Genomic resources for genetic improvement are lacking in blueberry. The objectives of this project are to add molecular markers to a genetic linkage map of blueberry and identify markers in this potential breeding population associated with cold hardiness, chilling requirement, and various fruit quality traits. Leaf tissue is being collected for extracting DNA and distributing it to the various scientists on the project. Plants from the mapping population are being propagated and plantings established at the various locations. This research will be used by blueberry breeders to develop new, improved blueberry varieties through marker-assisted selection. Progress was monitored by the ADODR through phone calls and e-mails to exchange data and discuss research plans. A meeting is being planned for next year of all the scientists and advisory board members involved on the SCRI project.


Last Modified: 9/1/2014
Footer Content Back to Top of Page