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Type: Journal article
Title: Quantitative trait loci for grain fructan concentration in wheat (Triticum aestivum L.)
Author: Huynh, B.
Wallwork, H.
Stangoulis, J.
Graham, R.
Willsmore, K.
Olson, S.
Mather, D.
Citation: Theoretical and Applied Genetics: international journal of plant breeding research, 2008; 117(5):701-709
Publisher: Springer
Issue Date: 2008
ISSN: 0040-5752
Statement of
Bao-Lam Huynh, Hugh Wallwork, James C. R. Stangoulis, Robin D. Graham, Kerrie L. Willsmore, Steven Olson, Diane E. Mather
Abstract: Fructans (fructo-oligosaccharides) are prebiotics that are thought to selectively promote the growth of colonic bifidobacteria, thereby improving human gut health. Fructans are present in the grain of wheat, a staple food crop. In the research reported here, we aimed to detect and map loci affecting grain fructan concentration in wheat using a doubled-haploid population derived from a cross between a high-fructan breeding line, Berkut, and a low-fructan cultivar, Krichauff. Fructan concentration was measured in grain samples grown at two locations in Australia and one in Kazakhstan. Fructan concentration varied widely within the population, ranging from 0.6 to 2.6% of grain dry weight, and was quite repeatable, with broad-sense heritability estimated as 0.71. With a linkage map of 528 molecular markers, quantitative trait loci (QTLs) were detected on chromosomes 2B, 3B, 5A, 6D and 7A. Of these, the QTLs on chromosomes 6D and 7A had the largest effects, explaining 17 and 27% of the total phenotypic variance, respectively, both with the favourable (high-fructan concentration) alleles contributed from Berkut. These chromosome regions had similar effects in another mapping population, Sokoll/Krichauff, with the favourable alleles contributed from Sokoll. It is concluded that grain fructan concentration of wheat can be improved by breeding and that molecular markers could be used to select effectively for favourable alleles in two regions of the wheat genome.
Keywords: Chromosomes, Plant
Genetic Markers
Chromosome Mapping
Crosses, Genetic
Epistasis, Genetic
Quantitative Trait Loci
Genetic Linkage
DOI: 10.1007/s00122-008-0811-6
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Appears in Collections:Agriculture, Food and Wine publications
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