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GrainGenes Reference Report: TAG-101-767

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Reference	TAG-101-767
Title	Mapping and validation of chromosome regions conferring boron toxicity tolerance in wheat (Triticum aestivum)
Journal	Theoretical and Applied Genetics
Year	2000
Volume	101
Pages	767-777
Author	Jefferies SP [ Show all 9 ]
Abstract	Boron is an essential plant micro-nutrient which can be phytotoxic to plants if present in soils in high concentration. Boron toxicity has been recognised as an important problem limiting production in the low rainfall areas of southern Australia, West Asia and North Africa. Genetic variation for boron toxicity tolerance in wheat has been well-characterised. The efficiency of breeding for boron toxicity tolerance could be greatly enhanced by the development of molecular markers associated with QTLs for tolerance in wheat. A population of 161 doubled haploids from a cross between the tolerant cultivar Halberd and the moderately sensitive cultivar Cranbrook was used to identify chromosomal regions involved in boron tolerance. A combined RFLP and AFLP linkage map of the Cranbrook x Halberd population was used to identify chromosomal regions involved in the boron tolerance traits measured. Regions on chromosome 7B and 7D were associated with leaf symptom expression. The region on chromosome 7B was also associated with the control of boron uptake and with a reduction in the effect of boron toxicity on root-growth suppression. RFLP markers at the chromosome 7B and 7D loci were shown to be effective in selecting for improved boron tolerance in an alternative genetic background. Halberd alleles at the chromosome 7B locus were associated with the concentration of boron in whole shoots and grain. The concentration of boron in whole shoots and in grain were both related to grain yield in a field trial conducted on soil containing toxic levels of boron. Implications relating to marker-assisted selection for boron toxicity tolerance in wheat are discussed.
External Databases	https://doi.org/10.1007/s001220051542
Gene	Bo1 (Triticum)
Keyword	[ Hide all but 1 of 42 ] aflp alleles asia australia barley boron boron tolerance boron toxicity breeding chromosome doubled haploid field genetic background genetic variation grain yield haploid linkage linkage map loci locus map mapping marker marker assisted selection molecular marker north africa population qtl resistance rflp rflp marker root growth selection shoot software soil suppression tolerance toxicity triticum aestivum west asia yield

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