caa a22 4500 475793927 CHVBK 20180406123718.0 cr unu---uuuuu 170329e20001001xx s 000 0 eng 10.1007/s001220051542 doi (NATIONALLICENCE)springer-10.1007/s001220051542 Mapping and validation of chromosome regions conferring boron toxicity tolerance in wheat ( Triticum aestivum ) [Elektronische Daten] [S. P. Jefferies, M. A. Pallotta, J. G. Paull, A. Karakousis, J. M. Kretschmer, S. Manning, A. K. M. R. Islam, P. Langridge, K. J. Chalmers] 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. Springer-Verlag Berlin Heidelberg, 2000 Key words Boron toxicity nationallicence Boron tolerance nationallicence Mapping nationallicence Wheat nationallicence Marker-assisted selection nationallicence Jefferies S. P. Department of Plant Science, Waite Campus, University of Adelaide, South Australia 5064 and CRC for Molecular Plant Breeding, Waite Campus, South Australia 5064, Australia, AU aut Pallotta M. A. Department of Plant Science, Waite Campus, University of Adelaide, South Australia 5064 and CRC for Molecular Plant Breeding, Waite Campus, South Australia 5064, Australia, AU aut Paull J. G. Department of Plant Science, Waite Campus, University of Adelaide, South Australia 5064 and CRC for Molecular Plant Breeding, Waite Campus, South Australia 5064, Australia, AU aut Karakousis A. Department of Plant Science, Waite Campus, University of Adelaide, South Australia 5064 and CRC for Molecular Plant Breeding, Waite Campus, South Australia 5064, Australia, AU aut Kretschmer J. M. Department of Plant Science, Waite Campus, University of Adelaide, South Australia 5064 and CRC for Molecular Plant Breeding, Waite Campus, South Australia 5064, Australia, AU aut Manning S. Department of Plant Science, Waite Campus, University of Adelaide, South Australia 5064 and CRC for Molecular Plant Breeding, Waite Campus, South Australia 5064, Australia, AU aut Islam A. K. M. R. Department of Plant Science, Waite Campus, University of Adelaide, South Australia 5064 and CRC for Molecular Plant Breeding, Waite Campus, South Australia 5064, Australia, AU aut Langridge P. Department of Plant Science, Waite Campus, University of Adelaide, South Australia 5064 and CRC for Molecular Plant Breeding, Waite Campus, South Australia 5064, Australia, AU aut Chalmers K. J. Department of Plant Science, Waite Campus, University of Adelaide, South Australia 5064 and CRC for Molecular Plant Breeding, Waite Campus, South Australia 5064, Australia, AU aut https://doi.org/10.1007/s001220051542 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1007/s001220051542 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Jefferies S. P. Department of Plant Science, Waite Campus, University of Adelaide, South Australia 5064 and CRC for Molecular Plant Breeding, Waite Campus, South Australia 5064, Australia, AU aut NATIONALLICENCE 700 1- Pallotta M. A. Department of Plant Science, Waite Campus, University of Adelaide, South Australia 5064 and CRC for Molecular Plant Breeding, Waite Campus, South Australia 5064, Australia, AU aut NATIONALLICENCE 700 1- Paull J. G. Department of Plant Science, Waite Campus, University of Adelaide, South Australia 5064 and CRC for Molecular Plant Breeding, Waite Campus, South Australia 5064, Australia, AU aut NATIONALLICENCE 700 1- Karakousis A. Department of Plant Science, Waite Campus, University of Adelaide, South Australia 5064 and CRC for Molecular Plant Breeding, Waite Campus, South Australia 5064, Australia, AU aut NATIONALLICENCE 700 1- Kretschmer J. M. Department of Plant Science, Waite Campus, University of Adelaide, South Australia 5064 and CRC for Molecular Plant Breeding, Waite Campus, South Australia 5064, Australia, AU aut NATIONALLICENCE 700 1- Manning S. Department of Plant Science, Waite Campus, University of Adelaide, South Australia 5064 and CRC for Molecular Plant Breeding, Waite Campus, South Australia 5064, Australia, AU aut NATIONALLICENCE 700 1- Islam A. K. M. R. Department of Plant Science, Waite Campus, University of Adelaide, South Australia 5064 and CRC for Molecular Plant Breeding, Waite Campus, South Australia 5064, Australia, AU aut NATIONALLICENCE 700 1- Langridge P. Department of Plant Science, Waite Campus, University of Adelaide, South Australia 5064 and CRC for Molecular Plant Breeding, Waite Campus, South Australia 5064, Australia, AU aut NATIONALLICENCE 700 1- Chalmers K. J. Department of Plant Science, Waite Campus, University of Adelaide, South Australia 5064 and CRC for Molecular Plant Breeding, Waite Campus, South Australia 5064, Australia, AU aut Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer