GrainGenes Reference Report: FIG-7-53
Reference
FIG-7-53
Title
Identification of quantitative trait loci and associated candidate genes for low-temperature tolerance in cold-hardy winter wheat.
Journal
Functional and Integrative Genomics
Year
2007
Volume
7
Pages
53
Author
Baga M
[ Show all 6 ]
Abstract
Low-temperature (LT) tolerance is an important economic trait in winter wheat (Triticum aestivum L.) that determines the plants' ability to cope with below freezing temperatures. Essential elements of the LT tolerance mechanism are associated with the winter growth habit controlled by the vernalization loci (Vrn-1) on the group 5 chromosomes. To identify genomic regions, which in addition to vrn-1 determine the level of LT tolerance in hexaploid wheat, two doubled haploid (DH) mapping populations were produced using parents with winter growth habit (vrn-A1, vrn-B1, and vrn-D1) but showing different LT tolerance levels. A total of 107 DH lines were analyzed by genetic mapping to produce a consensus map of 2,873 cM. The LT tolerance levels for the Norstar (LT50=-20.7C) x Winter Manitou (LT50=-14.3C) mapping population ranged from -12.0 to -22.0C. Single marker analysis and interval mapping of phenotyped lines revealed a major quantitative trait locus (QTL) on chromosome 5A and a weaker QTL on chromosome 1D. The 5A QTL located 46 cM proximal to the vrn-A1 locus explained 40% of the LT tolerance variance. Two C-repeat Binding Factor (CBF) genes expressed during cold acclimation in Norstar were located at the peak of the 5A QTL.
External Databases
DOI: 10.1007/s10142-006-0030-7
Gene Class
Frost resistance
Keyword
Low-temperature tolerance QTL mapping Triticum aestivum vernalization
GrainGenes is a product of the Agricultural Research Service of the US Department of Agriculture.
GrainGenes Reference Report: FIG-7-53
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GrainGenes is a product of the Agricultural Research Service of the US Department of Agriculture. | |||