AM symbiotic traits can be selected using conventional breeding methods in durum wheat
Date
2010-02-24
Authors
Hamel, C.
Singh, A.
DePauw, R.
Know, R.
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Poster Presentation
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Abstract
The management of the arbuscular mycorrhizal (AM) symbiosis, could improve plant’s
efficiency of fertilizer use. The development and function of an AM symbiosis is largely
controlled by the genotype of the host plant. Thus, it may be possible to improve crop nutrient use
efficiency by the selection of genotypes with improve symbiotic effectiveness. Variability in
the AM symbiotic development of durum wheat genotypes must be present in breeder plant
material for a breeding program to be effective. We tested in the greenhouse under two levels of
fertility, the hypothesis that durum wheat genotypes representative of five mapping populations
vary in their ability to form the AM symbiosis. We found variations in the influence of the
commercial AM fungus Glomus intraradices on root colonization, nutrition, and yield of durum
wheat. This variation indicates that it is possible to select durum genotypes for improved
symbiosis formation using conventional breeding methods.
Description
Keywords
arbuscular mycorrhizal symbiosis, phosphorus acquisition efficiency, durum genotype
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Soils and Crops Workshop