Water- and nitrogen-dependent alterations in the inheritance mode of transpiration efficiency in winter wheat at the leaf and whole-plant level
| Autor: | Andrzej G. Górny, Dominika Ratajczak |
|---|---|
| Rok vydání: | 2012 |
| Předmět: |
Stomatal conductance
Nitrogen Inheritance Patterns Biology Genes Plant Photosynthesis Interaction Soil Plant Genetics • Original Paper Gene Expression Regulation Plant Genetics Adaptation Water-use efficiency Triticum Triticum aestivum L Transpiration N shortage Inheritance Drought Moisture Chimera Genetic Variation Water Water use efficiency food and beverages Plant Transpiration General Medicine Carbon Dioxide Photosynthetic capacity Droughts Plant Leaves Phenotype Agronomy Plant Stomata Seeds Photosynthetic activity Combining ability Seasons Water use |
| Zdroj: | Journal of Applied Genetics |
| ISSN: | 2190-3883 1234-1983 |
| DOI: | 10.1007/s13353-012-0107-z |
| Popis: | The effects of contrasting water and nitrogen (N) supply on the observed inheritance mode of transpiration efficiency (TE) at the flag-leaf and whole-season levels were examined in winter wheat. Major components of the photosynthetic capacity of leaves and the season-integrated efficiency of water use in vegetative and grain mass formation were evaluated in parental lines of various origins and their diallel F(2)-hybrids grown in a factorial experiment under different moisture and N status of the soil. A broad genetic variation was mainly found for the season-long TE measures. The variation range in the leaf photosynthetic indices was usually narrow, but tended to slightly enhance under water and N shortage. Genotype-treatment interaction effects were significant for most characters. No consistency between the leaf- and season-long TE measures was observed. Preponderance of additivity-dependent variance was mainly identified for the season-integrated TE and leaf CO(2) assimilation rate. Soil treatments exhibited considerable influence on the phenotypic expression of gene action for the residual leaf measures. The contribution of non-additive gene effects and degree of dominance tended to increase in water- and N-limited plants, especially for the leaf transpiration rate and stomatal conductance. The results indicate that promise exists to improve the season-integrated TE. However, selection for TE components should be prolonged for later hybrid generations to eliminate the masking of non-additive causes. Such evaluation among families grown under sub-optimal water and nitrogen supply seems to be the most promising strategy in winter wheat. |
| Databáze: | OpenAIRE |
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