The potential of selection and breeding for improved salt tolerance in lucerne (Medicago sativa L.)

Four cultivars of Medicago sativa L. were subjected to selection for improved salt tolerance using a salinized solution culture technique at 250 mM NaCl. High (shoot lengths 14-31 mm) and low (7-12 mm) selection lines were established. Eleven selected plants from cv. CUF 101, and 10 from Local Syria...

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Bibliographic Details
Published in:Euphytica 1993-01, Vol.65 (1), p.43-51
Main Authors: Al-Khatib, M. (Liverpool Univ. (United Kingdom). Dept. of Environmental and Evolutionary Biology), McNeilly, T, Collins, J.C
Format: Article
Language:English
Subjects:
Adaptation to environment and cultivation conditions
Agronomy. Soil science and plant productions
AMELIORATION DES PLANTES
Biological and medical sciences
DESCENDANCE
FITOMEJORAMIENTO
Fundamental and applied biological sciences. Psychology
Genetics and breeding of economic plants
MEDICAGO SATIVA
PLANT BREEDING
PLANTULAS
PLANTULE
PROGENIE
PROGENY
SALT TOLERANCE
SEEDLINGS
SELECCION
SELECTION
TOLERANCE AU SEL
TOLERANCIA A LA SAL
VARIEDADES
Varietal selection. Specialized plant breeding, plant breeding aims
VARIETE
VARIETIES
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Summary:Four cultivars of Medicago sativa L. were subjected to selection for improved salt tolerance using a salinized solution culture technique at 250 mM NaCl. High (shoot lengths 14-31 mm) and low (7-12 mm) selection lines were established. Eleven selected plants from cv. CUF 101, and 10 from Local Syria were grown on and polycrossed. A sample of progeny seed from each was grown at 8 NaCl concentrations in solution cultures. A second cycle of selection at 280 mM NaCl with these two cultivars achieved selection intensities of 0.21% and 0.45% for high and low selection lines, respectively. Seedlings derived from 1st and 2nd selection cycles and unselected control material were grown for 6 weeks at 0, 150, 175, and 200 mM NaCl in a sand culture experiment. The high selection line produced significantly greater shoot fresh weight, dry weight, and % live shoot weight than the unselected control material. Clearly selection as practised here can isolate individual seedlings having enhanced genetically based tolerance to NaCl, which is manifest in mature plants derived from polycrossing those selected individuals.
ISSN:0014-2336
1573-5060
DOI:10.1007/bf00022198