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Open AccessArticle

QTL Mapping Reveals the Relationship between Pasting Properties and Malt Extract in Barley

1
Institute of Crop and Nuclear Technology Utilization, Jinghuan, Hangzhou 310021, China
2
Tasmanian Institute of Agriculture, University of Tasmania, Launceston, Tasmania 6250, Australia
*
Author to whom correspondence should be addressed.
Int. J. Mol. Sci. 2018, 19(11), 3559; https://doi.org/10.3390/ijms19113559
Received: 9 September 2018 / Revised: 27 October 2018 / Accepted: 30 October 2018 / Published: 12 November 2018
(This article belongs to the Section Molecular Plant Sciences)
Pasting properties are important characteristics of barley starch from a processing standpoint. Many studies reported the close relationship between pasting properties and malting quality, especially malt extract. However, most conclusions were derived from the correlation between pasting properties and malting quality using a set of cultivars or breeding lines. In this study, a doubled haploid population of 150 lines from a cross between a Japanese malting barley and a Chinese feed barley was grown in four different environments (two sites × two years). Based on average values from all different environments, 17 significant quantitative trait loci (QTL) were identified for pasting properties. The genetic variance explained by these QTL varied from 7.0 to 23.2%. Most QTL controlling pasting properties were located on 1H, 2H, 5H, and 7H. Results confirmed the linkage between pasting properties and malt extract, with most of the QTL for pasting properties becoming nonsignificant when using malt extract as a covariate. Breakdown showed the closest correlation with malt extract. Molecular markers closely linked to the QTL can be used to select desired pasting properties to improve malting quality. View Full-Text
Keywords: barley (Hordeum vulgare L.); quantitative trait loci (QTL); pasting property; malt extract; rapid visco-analyzer (RVA) barley (Hordeum vulgare L.); quantitative trait loci (QTL); pasting property; malt extract; rapid visco-analyzer (RVA)
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Wang, J.; Yang, J.; Hua, W.; Wu, X.; Zhu, J.; Shang, Y.; Zhou, M. QTL Mapping Reveals the Relationship between Pasting Properties and Malt Extract in Barley. Int. J. Mol. Sci. 2018, 19, 3559.

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