Physiological genetics of salt tolerance in wheat (Triticum aestivum L.): performance of wheat varieties, inbred lines and reciprocal F1 hybrids under saline conditions

Four bread wheat cultivars were studied at two salinity levels. Tobari 66 had the lowest uptake of Na+ and Cl−, and the highest K+/Na+ ratio; Pato had the highest uptake of these ions and Lyallpur 73 was intermediate. Intervarietal differences were greater at higher salinity, suggesting that they we...

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Bibliographic Details
Published in:Journal of agronomy and crop science (1986) 1999, Vol.183 (3), p.145-156
Main Authors: Salam, A, Hollington, P.A, Gorham, J, Wyn Jones, R.G, Gliddon, C
Format: Article
Language:English
Subjects:
Adaptation to environment and cultivation conditions
Agronomy. Soil science and plant productions
Biological and medical sciences
chlorides
crop yield
F1 hybrids - grain yield - inorganic ions - physiological genetics - salt tolerance -Triticum aestivum L
Fundamental and applied biological sciences. Psychology
genes
genetic variation
Genetics and breeding of economic plants
genotype
height
hybrids
inbred lines
inflorescences
ion transport
length
loci
plant characteristics
plant physiology
potassium
ratios
salinity
salt tolerance
seed weight
sodium
tillers
Triticum aestivum
Varietal selection. Specialized plant breeding, plant breeding aims
varieties
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Summary:Four bread wheat cultivars were studied at two salinity levels. Tobari 66 had the lowest uptake of Na+ and Cl−, and the highest K+/Na+ ratio; Pato had the highest uptake of these ions and Lyallpur 73 was intermediate. Intervarietal differences were greater at higher salinity, suggesting that they were not caused by variation at the Kna1 locus. There were significant differences between inbred lines for Na+, particularly in Blue Silver, suggesting the possibility of selecting genotypes with enhanced tolerance from within existing cultivars. Pato, Tobari 66 and their reciprocal F1 hybrids were further evaluated at four salinity levels. The hybrids exhibited similar relative grain yield to Tobari, with better Na+ and Cl− exclusion and higher K+/Na+ ratios than Pato. Overall, Tobari had the highest absolute yield under salinity, and the hybrids were closer to Tobari than to Pato. Tiller and grain numbers, 100‐grain weight and yield were more affected by salinity than were height, spike length and spikelet number. We conclude that intervarietal variation for salt tolerance in wheat is controlled by genes which could be transferred to sensitive genotypes to improve their tolerance, and that the K+/Na+ ratio of the youngest leaf could be used to screen for salt tolerance.
ISSN:0931-2250
1439-037X
DOI:10.1046/j.1439-037x.1999.00361.x