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ABSTRACT Doubled haploid families extracted from the F1 hybrid of the spring barley cross (Dissa × Sabarlis) by the _Hordeum bulbosum_ technique were scored for the segregation of alleles at

isozyme loci. Isozyme and protein loci on all seven pairs of barley chromosomes were examined and five out of the seven pairs of barley chromosomes (2I, 3I, 4I, 6I and 7I) were shown to

possess polymorphic isozyme and protein loci. The systems tested did not deviate significantly from the expected 1:1 ratio and esterase loci on chromosome 3 were mapped intra-chromosomally.

The relationship between marker loci and quantitative trait loci (QTL) was examined. A comparison of the mean scores for each allelic class revealed significant differences in the expression

of a range of quantitative traits. Thus, by selecting for isozyme and protein phenotypes one can significantly affect the expression of certain QTL in barley. For example, allelic variation

at the α-_Amy_-1 locus makes a large contribution to the genetic variation available for selection in the case of single plant yield. The advantage of using DH families for gene mapping and

in dissecting QTL are discussed. SIMILAR CONTENT BEING VIEWED BY OTHERS QTL MAPPING AND CANDIDATE GENE ANALYSIS OF SEED VIGOR-RELATED TRAITS DURING ARTIFICIAL AGING IN WHEAT (_TRITICUM

AESTIVUM_) Article Open access 16 December 2020 MAPPING GENOMIC REGIONS OF MOISTURE DEFICIT STRESS TOLERANCE USING BACKCROSS INBRED LINES IN WHEAT (_TRITICUM AESTIVUM_ L.) Article Open

access 10 December 2020 THE INFLUENCE OF BREEDING HISTORY, ORIGIN AND GROWTH TYPE ON POPULATION STRUCTURE OF BARLEY AS REVEALED BY SSR MARKERS Article Open access 05 November 2020 ARTICLE

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INFORMATION AUTHORS AND AFFILIATIONS * Scottish Crop Research Institute, Invergowrie, Dundee, DD2 5DA, UK W Powell, R P Ellis, M Macaulay, J McNicol & B P Forster Authors * W Powell View

author publications You can also search for this author inPubMed Google Scholar * R P Ellis View author publications You can also search for this author inPubMed Google Scholar * M Macaulay

View author publications You can also search for this author inPubMed Google Scholar * J McNicol View author publications You can also search for this author inPubMed Google Scholar * B P

Forster View author publications You can also search for this author inPubMed Google Scholar RIGHTS AND PERMISSIONS Reprints and permissions ABOUT THIS ARTICLE CITE THIS ARTICLE Powell, W.,

Ellis, R., Macaulay, M. _et al._ The effect of selection for protein and isozyme loci on quantitative traits in a doubled haploid population of barley. _Heredity_ 65, 115–122 (1990).

https://doi.org/10.1038/hdy.1990.77 Download citation * Received: 17 January 1990 * Issue Date: 01 August 1990 * DOI: https://doi.org/10.1038/hdy.1990.77 SHARE THIS ARTICLE Anyone you share

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