Quantitative trait loci controlling kernel discoloration in barley (Hordeum vulgare L.)

Li, C. D., Lance, R. C. M., Collins, H. M., Tarr, A., Roumeliotis, S., Harasymow, S., Cakir, M., Fox, G. P., Grime, C. R., Broughton, S., Young, K. J., Raman, H., Barr, A. R., Moody, D. B. and Readf, B. J. (2003) Quantitative trait loci controlling kernel discoloration in barley (Hordeum vulgare L.). AUSTRALIAN JOURNAL OF AGRICULTURAL RESEARCH, 54 11-12: 1251-1259. doi:10.1071/AR03002

Author Li, C. D.
Lance, R. C. M.
Collins, H. M.
Tarr, A.
Roumeliotis, S.
Harasymow, S.
Cakir, M.
Fox, G. P.
Grime, C. R.
Broughton, S.
Young, K. J.
Raman, H.
Barr, A. R.
Moody, D. B.
Readf, B. J.
Title Quantitative trait loci controlling kernel discoloration in barley (Hordeum vulgare L.)
Formatted title
Quantitative trait loci controlling kernel discoloration in barley (Hordeum vulgare L.)
Journal name AUSTRALIAN JOURNAL OF AGRICULTURAL RESEARCH   Check publisher's open access policy
ISSN 0004-9409
Publication date 2003
Sub-type Article (original research)
DOI 10.1071/AR03002
Volume 54
Issue 11-12
Start page 1251
End page 1259
Total pages 9
Place of publication Collingwood, Vic., Australia
Publisher CSIRO Publishing
Language eng
Abstract Barley kernel discoloration (KD) leads to substantial annual loss in value through downgrading and discounting of malting barley. KD is a difficult trait to introgress into elite varieties as it is controlled by multiple genes and strongly influenced by environment and maturity. As the first step towards marker assisted selection for KD tolerance, we mapped quantitative trait loci (QTLs) controlling KD measured by grain brightness [Minolta L; (Min L)], redness (Min a), and yellowness (Min b) in 7 barley populations. One to 3 QTLs were detected for grain brightness in various populations, and one QTL could account for 5–31% of the phenotypic variation. The QTL located around the centromere region of chromosome 2H was consistently detected in 6 of the 7 populations, explaining up to 28% of the phenotypic variation. In addition, QTLs for grain brightness were most frequently identified on chromosomes 3H and 7H in various populations. Australian varieties Galleon, Chebec, and Sloop contribute an allele to increase grain brightness on chromosome 7H in 3 different populations. A major gene effect was detected for grain redness. One QTL on chromosome 4H explained 54% of the phenotypic variation in the Sloop/Halcyon population, and was associated with the blue aleurone trait. A second QTL was detected on the long arm of chromosome 2H in 3 populations, accounting for 23–47% of the phenotypic variation. The major QTLs for grain yellowness were mapped on chromosomes 2H and 5H. There were strong associations between the QTLs for heading date, grain brightness, and yellowness. The molecular markers linked with the major QTLs should be useful for marker assisted selection for KD.
Keyword Weather staining
Grain quality
Q-Index Code C1
Q-Index Status Provisional Code
Institutional Status Non-UQ

Document type: Journal Article
Sub-type: Article (original research)
Collection: Queensland Alliance for Agriculture and Food Innovation
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Created: Mon, 07 Mar 2011, 15:06:29 EST