Investigating the molecular genetics of malt and feed quality traits in barley

Lawson, W., Mace, E., Collard, B., Fox, G., Kelly, A., Sutherland, M. and Franckowiak, J. (2010). Investigating the molecular genetics of malt and feed quality traits in barley. In: 6th Canadian Barley Technical Symposium, Saskatoon, Saskatchewan, Canada, (). 25-28 July 2010.

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Author Lawson, W.
Mace, E.
Collard, B.
Fox, G.
Kelly, A.
Sutherland, M.
Franckowiak, J.
Title of paper Investigating the molecular genetics of malt and feed quality traits in barley
Conference name 6th Canadian Barley Technical Symposium
Conference location Saskatoon, Saskatchewan, Canada
Conference dates 25-28 July 2010
Place of Publication Saskatoon, Saskatchewan, Canada
Publisher University of Saskatchewan
Publication Year 2010
Sub-type Other
Language eng
Formatted Abstract/Summary
QTL analyses of more than twenty-two malt and feed barley quality attributes
(including ADF, DMD, grain hardness, hot water extract, and diastatic power) in two F6-
derived recombinant inbred barley populations revealed that surprisingly few genomic
regions are involved in the control of traits considering the quantitative nature of the
characteristics and the complexity of current trait measurement methodology. Although
QTLs were located on all 7 barley chromosomes, the vast majority of the traits mapped to the same genomic regions, mostly on linkage groups 2H, 3H and 5H. Positive alleles for the various traits contributed by each parent were observed to be located coincidently in the same linkage block. In terms of breeding strategies, the clustering of multiple traits at various chromosomal locations permits specific phenotypes to be selected as single units. Selection for specific genomic regions containing multiple traits, as opposed to individual traits, should be of greater value in a breeding program for classifying germplasm and designing appropriate breeding strategies. Especially considering it will be more useful, when dealing with complex traits, to select for linkage blocks or haplotypes rather than an ever-expanding set of individual alleles. In contrast, co-incidence of alleles for multiple traits derived from
both parents can also pose restrictions on the ability to simultaneously integrate multiple traits in a single selection step. Analyses of the genetic makeup of these traits in two different genetic backgrounds have provided valuable insight into the molecular basis of barley quality characteristics including genomic locations, epistatic interactions, and genetic and environmental contributions to each trait. Unravelling these characteristics will contribute to the development of a synergistic relationship between identification of DNA markers and improved phenotyping methodology for grain quality traits. This will in turn enable more accurate identification of molecular markers for marker assisted selection in barley breeding programs.
Q-Index Code EX
Q-Index Status Provisional Code
Institutional Status Non-UQ
Additional Notes The 6th CBS theme, "Where Have All the Acres Gone"

Document type: Conference Paper
Collection: School of Agriculture and Food Sciences
 
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Created: Fri, 18 Mar 2011, 13:09:45 EST by Samantha Richards on behalf of Qld Alliance for Agriculture and Food Innovation