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A new semi-dwarfing gene identified by molecular mapping of quantitative trait loci in barley.

Yu, G.T. and Horsley, R.D. and Zhang, B.X. and Franckowiak, J.D. (2010) A new semi-dwarfing gene identified by molecular mapping of quantitative trait loci in barley. Theoretical and Applied Genetics, 120 (4). pp. 853-861.

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Article Link(s): http://dx.doi.org/10.1007/s00122-009-1216-x

Publisher URL: http://www.springer.com

Abstract

Semi-dwarfing genes have been widely used in spring barley (Hordeum vulgare L.) breeding programs in many parts of the world, but the success in developing barley cultivars with semi-dwarfing genes has been limited in North America. Exploiting new semi-dwarfing genes may help in solving this dilemma. A recombinant inbred line population was developed by crossing ZAU 7, a semi-dwarf cultivar from China, to ND16092, a tall breeding line from North Dakota. To identify quantitative trait loci (QTL) controlling plant height, a linkage map comprised of 111 molecular markers was constructed. Simple interval mapping was performed for each of the eight environments. A consistent QTL for plant height was found on chromosome 7HL. This QTL is not associated with maturity and rachis internode length. We suggest the provisional name Qph-7H for this QTL. Qph-7H from ZAU 7 reduced plant height to about 3/4 of normal; thus, Qph-7H is considered a semi-dwarfing gene. Other QTLs for plant height were found, but their expression was variable across the eight environments tested.

Item Type:Article
Business groups:Agri-Science, Crop and Food Science
Additional Information:© Springer-Verlag.
Keywords:Fusarium head blight; Hordeum vulgare L.; agronomic traits; dwarfing genes; plant height; resistance; genome; quantitative trait loci (QTL).
Subjects:Plant culture > Field crops > Barley
Science > Biology > Genetics > Quantitative genetics (esp. Quantitative Trait Loci (QTL) articles)
Deposited On:23 Jun 2010 06:22
Last Modified:26 Oct 2011 05:23

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