Chromosomal loci associated with endosperm hardness in a malting barley cross

Walker, Cassandra K. and Panozzo, J. F. and Ford, R. and Eckermann, P. and Moody, D. and Lehmensiek, A. and Appels, R. (2011) Chromosomal loci associated with endosperm hardness in a malting barley cross. Theoretical and Applied Genetics, 122 (1). pp. 151-162. ISSN 0040-5752

Abstract

A breeding objective for the malting barley industry is to produce lines with softer, plumper grain containing more likely to imbibe water readily and contain more starch per grain, which in turn produces higher levels of malt extract. In a malting barley mapping population, ‘Arapiles’ x ‘Franklin’, the most significant and robust quantitative trait locus (QTL) for endosperm hardness was observed on the short arm of chromosome 1H, across three environments over two growing seasons. This accounted for 22.6% (Horsham 2000), 26.8% (Esperance 2001), and 12.0% (Tarranyurk 2001) of the genetic variance and significantly increased endosperm hardness by 2.06–3.03 SKCS hardness units. Interestingly, Arapiles and Franklin do not vary in Ha locus alleles. Therefore, this region, near the centromere on chromosome 1H, may be of great importance when aiming to manipulate endosperm hardness and malting quality. Interestingly, this region, close to the centromere on chromosome 1H, in our study, aligns with the region of the genome that includes the HvCslF9 and the HvGlb1 genes. Potentially, one or both of these genes could be considered to be candidate genes that influence endosperm hardness in the barley grain. Additional QTLs for endosperm hardness were detected on chromosomes 2H, 3H, 6H and 7H, confirming that the hardness trait in barley is complex and multigenic, similar to many malting quality traits of interest.


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Item Type: Article (Commonwealth Reporting Category C)
Refereed: Yes
Item Status: Live Archive
Additional Information: Author version not held. Published online 10 Sep 2010
Depositing User: Mrs Julie-Anne Christensen
Faculty / Department / School: Historic - Faculty of Sciences - Department of Biological and Physical Sciences
Date Deposited: 27 Feb 2011 05:46
Last Modified: 19 Aug 2014 06:09
Uncontrolled Keywords: breeding objectives; candidate genes; genetic variance; growing season; malt extract; malting quality; mapping populations; protein contents; quantitative trait locus
Fields of Research (FOR2008): 10 Technology > 1003 Industrial Biotechnology > 100303 Fermentation
10 Technology > 1001 Agricultural Biotechnology > 100105 Genetically Modified Field Crops and Pasture
07 Agricultural and Veterinary Sciences > 0703 Crop and Pasture Production > 070305 Crop and Pasture Improvement (Selection and Breeding)
Socio-Economic Objective (SEO2008): B Economic Development > 82 Plant Production and Plant Primary Products > 8205 Winter Grains and Oilseeds > 820501 Barley
Identification Number or DOI: doi: 10.1007/s00122-010-1431-5
URI: http://eprints.usq.edu.au/id/eprint/9324

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