The expression of salt tolerance from Triticum tauschii in hexaploid wheat

Accessions of Triticum tauschii (Coss.) Schmal. (D genome donor to hexaploid wheat) vary in salt tolerance and in the rate that Na(+) accumulates in leaves. The aim of this study was to determine whether these differences in salt tolerance and leaf Na(+) concentration would be expressed in hexaploid...

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Bibliographic Details
Published in:Theoretical and applied genetics 1992-08, Vol.84 (5-6), p.714-719
Main Authors: Schachtman, D.P. (Commonwealth Scientific and Industrial Research Organization, Canberra (Australia). Div. of Plant Industry), Lagudah, E.S, Munns, R
Format: Article
Language:English
Subjects:
Biological and medical sciences
Classical genetics, quantitative genetics, hybrids
Fundamental and applied biological sciences. Psychology
Genetics
Genetics of eukaryotes. Biological and molecular evolution
GENOMAS
GENOME
GENOMES
HEXAPLOIDIA
HEXAPLOIDIE
HEXAPLOIDY
HIBRIDOS
HYBRIDE
HYBRIDS
Pteridophyta, spermatophyta
Salinity
SALT TOLERANCE
TOLERANCE AU SEL
TOLERANCIA A LA SAL
TRITICUM
Triticum tauschii
Vegetals
Wheat
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Summary:Accessions of Triticum tauschii (Coss.) Schmal. (D genome donor to hexaploid wheat) vary in salt tolerance and in the rate that Na(+) accumulates in leaves. The aim of this study was to determine whether these differences in salt tolerance and leaf Na(+) concentration would be expressed in hexaploid wheat. Synthetic hexaploids were produced from five T. tauschii accessions varying in salt tolerance and two salt-sensitive T. turgidum cultivars. The degree of salt tolerance of the hexaploids was evaluated as the grain yield per plant in 150 mol m(-3) NaCl relative to grain yield in 1 mol m(-3) NaCl (control). Sodium concentration in leaf 5 was measured after the leaf was fully expanded. The salt tolerance of the genotypes correlated negatively with the concentration of Na(+) in leaf 5. The salt tolerance of the synthetic hexaploids was greater than the tetraploid parents primarily due to the maintenance of kernel weight under saline conditions. Synthetic hexaploids varied in salt tolerance with the source of their D genome which demonstrates that genes for salt tolerance from the diploid are expressed at the hexaploid level.
ISSN:0040-5752
1432-2242
DOI:10.1007/bf00224174