Barley Cbf3 Gene Identification, Expression Pattern, and Map Location

• Published in: Plant physiology (Bethesda) Vol. 129; no. 4; pp. 1781 - 1787
• Main Authors: Dong-Woog Choi, Edmundo M. Rodriguez, Close, Timothy J.
• Format: Journal Article
• Language: English
• Published: Rockville, MD American Society of Plant Biologists 01.08.2002; American Society of Plant Physiologists
• Subjects: Agronomy. Soil science and plant productions; Amino Acid Sequence; Amino acids; Arabidopsis - genetics; Arabidopsis Proteins; Barley; Biological and medical sciences; Chromosome Mapping; Chromosomes; Classical and quantitative genetics. Population genetics. Molecular genetics; Complementary DNA; DNA; DNA-Binding Proteins - genetics; DNA-Binding Proteins - metabolism; Environmental Stress and Adaptation; Fundamental and applied biological sciences. Psychology; Gene Expression Regulation, Plant; Generalities. Genetics. Plant material; Genes; Genes. Genome; Genetic loci; Genetics and breeding of economic plants; Hordeum - genetics; Molecular and cellular biology; Molecular genetics; Molecular Sequence Data; Oryza - genetics; Plant Proteins - genetics; Plant Proteins - metabolism; Polymerase chain reaction; RNA; Sequence Homology, Amino Acid; Trans-Activators - genetics; Trans-Activators - metabolism; Transcription Factors - genetics; Monocotyledones; Environmental factor; Identification; Cereal crop; Arabidopsis thaliana; Oryza sativa; Gene; Cruciferae; Gramineae; Drought resistance; Dicotyledones; Linkage group; Angiospermae; Localization; Aminoacid sequence; Adaptation; Genetic mapping; Hordeum vulgare; Cold resistance; Chromosome 5; Gene expression; Quantitative trait loci; Sensitivity resistance; Spermatophyta; Experimental plant
• ISSN: 0032-0889; 1532-2548
• DOI: 10.1104/pp.003046

Although cold and drought adaptation in cereals and other plants involve the induction of a large number of genes, inheritance studies in Triticeae (wheat [Triticum aestivum], barley [Hordeum vulgare], and rye [Secale cereale]) have revealed only a few major loci for frost or drought tolerance that are consistent across multiple genetic backgrounds and environments. One might imagine that these loci could encode highly conserved regulatory factors that have global effects on gene expression; therefore, genes encoding central regulators identified in other plants might be orthologs of these Triticeae stress tolerance genes. The CBF/DREB1 regulators, identified originally in Arabidopsis as key components of cold and drought regulation, merit this consideration. We constructed barley cDNA libraries, screened these libraries and a barley bacterial artificial chromosome library using rice (Oryza sativa) and barley Cbf probes, found orthologs of Arabidopsis CBF/DREB1 genes, and examined the expression and genetic map location of the barley Cbf3 gene, HvCbf3. HvCbf3 was induced by a Cbf3 is located on barley chromosome 5H between markers WG364b and saflp58 on the barley cv Dicktoo × barley cv Morex genetic linkage map. This position is some 40 to 50 cM proximal to the winter hardiness quantitative trait locus that includes the Vrn-1H gene, but may coincide with the wheat 5A Rcg1 locus, which governs the threshold temperature at which cor genes are induced. From this, it remains possible that HvCbf3 is the basis of a minor quantitative trait locus in some genetic backgrounds, though that possibility remains to be thoroughly explored.