Mapping of chromosome regions conferring boron toxicity tolerance in barley (Hordeum vulgare L.)

• Published in: Theoretical and applied genetics Vol. 98; no. 8; pp. 1293 - 1303
• Main Authors: Jefferies, S.P, Barr, A.R, Karakousis, A, Kretschmer, J.M, Manning, S, Chalmers, K.J, Nelson, J.C, Islam, A.K.M.R, Langridge, P
• Format: Journal Article
• Language: English
• Published: Heidelberg Springer 01-06-1999; Berlin Springer Nature B.V
• Subjects: Barley; Biological and medical sciences; Boron; chromosome mapping; Chromosomes; Classical genetics, quantitative genetics, hybrids; crossing; Cultivars; dry matter accumulation; Fundamental and applied biological sciences. Psychology; gene location; Gene loci; Genetic aspects; Genetic engineering; genetic markers; Genetics of eukaryotes. Biological and molecular evolution; growth; Health aspects; heritability; Hordeum vulgare; landraces; Leaves; length; loci; mineral content; mineral excess; nutrition-genotype interaction; Physiological aspects; phytotoxicity; Plant genetics; Plant sciences; Pteridophyta, spermatophyta; quantitative traits; restriction fragment length polymorphism; roots; shoots; symptoms; tolerance; Toxicity; Vegetals; Australia; West Asia; North Africa; South Australia Australia; Genetic mapping; Monocotyledones; Linkage; Hordeum vulgare; Genetic marker; Toxicity; Chromosome; Cereal crop; Resistance; Boron; Restriction fragment length polymorphism; Gramineae; Angiospermae; Spermatophyta
• ISSN: 0040-5752; 1432-2242
• DOI: 10.1007/s001220051195

Boron toxicity has been recognised as an important problem limiting production in the low-rainfall regions of southern Australia, West Asia and North Africa. Genetic variation for boron toxicity tolerance in barley has been characterised but the mode of inheritance and the location of genes controlling tolerance were not previously known. A population of 150 doubled-haploid lines from a cross between a boron toxicity tolerant Algerian landrace, Sahara 3771, and the intolerant Australian cultivar Clipper was screened in four tolerance assays. An RFLP linkage map of the Clipper x Sahara population was used to identify chromosomal regions associated with boron tolerance in barley. Interval regression-mapping allowed the detection of four chromosomal regions involved in the boron tolerance traits measured. A region on chromosome 2H was associated with leaf-symptom expression, a region on chromosome 3H was associated with a reduction of the affect of boron toxicity on root growth suppression, a region on chromosome 6H was associated with reduced boron uptake, and a region on chromosome 4H was also associated with the control of boron uptake as well as being associated with root-length response, dry matter production and symptom expression. The benefits and potential of marker-assisted selection for boron toxicity tolerance are discussed.