Evaluation of preharvest sprouting traits in a collection of spring wheat germplasm using genotype and genotype×environment interaction model
Rasul, G., Humphreys, G.D., Wu, J., Brûlé-Babel, A., Fofana, B., Glover, K.D. (2012). Evaluation of preharvest sprouting traits in a collection of spring wheat germplasm using genotype and genotype×environment interaction model, 131(2), 244-251. http://dx.doi.org/10.1111/j.1439-0523.2011.01931.x
With 10 tables Preharvest sprouting (PHS) can greatly affect the consistent production of high-quality spring wheat (Triticum aestivum L.) in many regions worldwide including Western Canada. A worldwide collection of red- and white-seeded spring wheat genotypes with different levels of sprouting response were characterized for three PHS traits: falling number, germination index and sprouting index in three different environments in Manitoba, Canada. The data sets were analysed by the genotype and genotype×environment interaction model. Variance components were estimated, genotypic and their interaction effects with environments were predicted by using one of mixed linear model approaches: minimum norm quadratic unbiased estimation approach. Genotypic variance expressed as proportion to the phenotypic variance was higher compared to genotype×environment (G×E) interaction effects for all three PHS traits, suggesting that these genotypes can be used to develop high level of PHS-resistant cultivars regardless of environment. Strong correlations between PHS traits across environments suggest that all three traits are repeatable and reliable methods to determine PHS response in spring wheat depending on sample types (spike, grain or flour). Predicted genotypic effects, G×E interaction effects and the linear discriminant analysis revealed that white-seeded genotypes 'AUS1408', 'SC8019-R1' and Kanata, and red-seeded genotypes 'AC Domain', 'AC Majestic' and 'Red RL4137' would be useful PHS-resistant donors in spring wheat cultivar development programmes. © 2011 Blackwell Verlag GmbH.
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