Analysis of genetic variability of aluminium tolerance response in triticale

Comparative analyses of genetic variability of aluminium tolerance response were made in a range of triticale genotypes of two sets, one consisting of six Australian cultivars (or lines), the other consisting of eight South African lines and an Australian check, by following solution culture and scr...

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Bibliographic Details
Published in:Euphytica 1998-01, Vol.102 (2), p.177-182
Main Authors: Zhang, X.G. (New England Univ., Armidale, N.S.W. (Australia). Div. of Agronomy and Soil Science), Jessop, R.S
Format: Article
Language:English
Subjects:
Adaptation to environment and cultivation conditions
Agronomy. Soil science and plant productions
ALUMINIO
ALUMINIUM
Aluminum
Biological and medical sciences
Cultivars
Fundamental and applied biological sciences. Psychology
Genetic improvement
GENETIC VARIATION
Genetics
Genetics and breeding of economic plants
Genotypes
HEREDABILIDAD
HERITABILITE
HERITABILITY
Pollution tolerance
RACINE
RAICES
REBROTE
REGROWTH
REPOUSSE
RESISTANCE AUX PRODUITS CHIMIQUES
RESISTANCE TO CHEMICALS
RESISTENCIA A PRODUCTOS QUIMICOS
ROOTS
Seedlings
TRITICOSECALE
VARIACION GENETICA
VARIATION GENETIQUE
Varietal selection. Specialized plant breeding, plant breeding aims
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Summary:Comparative analyses of genetic variability of aluminium tolerance response were made in a range of triticale genotypes of two sets, one consisting of six Australian cultivars (or lines), the other consisting of eight South African lines and an Australian check, by following solution culture and screening under controlled growth cabinet conditions. Results showed that Tahara, Tahara 'S' and Abacus were the most Al-tolerant triticales among the Australian genotypes in terms of root regrowth characteristics at 10 μg.g^sup -1^ Al. The 19th ITSN 70-4, along with the standard cultivar Tahara was superior to all other South African genotypes; the eight South African genotypes spanned the range from Al-tolerant, moderately Al-tolerant to Al-sensitive. Regrown root length and percentage of seedlings with root regrowth were the two key indicators for screening and evaluating Al tolerance response. Considerable genetic variability of tolerance to Al stress among the two sets of tested genotypes was revealed by the estimates of genetic parameters. High heritability values were recorded for those two indicators, with associated high levels of relative genetic advance (RGA). Further improvement of varietal tolerance to Al stress in triticale could be anticipated through selection and breeding.[PUBLICATION ABSTRACT]
ISSN:0014-2336
1573-5060
DOI:10.1023/A:1018311426393