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GrainGenes Reference Report: CRC-32-209

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Reference
CRC-32-209
Title
Analysis of a QTL for spike nodding trait on barley chromosome 7(5H) using near isogenic lines
Journal
Cereal Research Communications
Year
2004
Volume
32
Pages
209-215
Author
Kandemir N
Yldrm A
Kleinhofs A
Abstract
Nodding of barley spikes is a useful trait that decreases weathering damage. Peduncle curvature, along with the curvature of spike itself, determines the nodding of spikes. A major quantitative trait locus (QTL) for spike nodding as a result of peduncle curvature was previously mapped on barley chromosome 7(5H) using Steptoe x Morex doubled haploid mapping population. In the present study, spike nodding trait of Steptoe was successfully transferred into Morex background using RFLP markers, and a series of near isogenic lines were developed. Analysis of near isogenic lines located the QTL in a 43 cM interval flanked by ABG473-R3226 markers. A near isogenic line (H18) that contains up to 70 cM of Steptoe chromosome 7 was studied under field conditions. Kernel brightness and wort colour and wort clarity properties were improved in H18 compared to recipient cultivar Morex. However, yield of H18 was somewhat lower than that of Morex. A more detailed study of the QTL region, especially for grain yield, is required before the use of this locus in malting barley breeding programs
Keyword
barley
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