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GrainGenes Reference Report: PBR-121-241

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Reference	PBR-121-241
Title	Evaluation of aluminium tolerance in a spring rye collection by hydroponic screening
Journal	Plant Breeding
Year	2002
Volume	121
Pages	241-248
Author	Hede AR Skovmand B Ribaut JM Gonzalez-de-Leon D Stolen O
Abstract	Summary: Aluminium (Al) tolerance of 63 rye accessions from a world spring rye collection was evaluated using the haematoxylin method and the root growth method. The haematoxylin method is based on the ability of Al-tolerant seedlings to continue root growth following a short pulse treatment with a high Al concentration, while the root growth method uses the root growth and root tolerance index to judge Al tolerance. Significantly higher levels of Al tolerance were found in rye than in the Al-tolerant bread wheat cultivar 'Maringa'. Under the assumption that the ability of roots to grow under Al stress is a combination of root vigour (long roots) and Al tolerance, a hypothesis allowing for the differentiation of five genotype classes was suggested. This study demonstrated that the haematoxylin method and the root growth parameter identify genotypes with long root growth under Al stress, but failed to detect Al tolerance in genotypes with poor root vigour. These genotypes can only be identified using the root tolerance index parameter. However, the haematoxylin method is highly suitable for screening large segregating populations derived from improved germplasm that has been preselected for agronomically preferable traits, including plant vigour
Keyword	[ Hide all but 1 of 36 ] abilities accession acid soils al al tolerance aluminium aluminium screening aluminium tolerance aluminium toxicity bread collection cultivar detect differentiation gene germplasm growth hematoxylin hypothesis method physiology root root growth root vigour rye screening secale cereale seedling selection spring spring rye stress tolerance trait triticale wheat cultivar

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