Distinct genetic regulation of flowering time and grain-filling period based on empirical study of D-genome diversity in synthetic hexaploid wheat lines
- 1 January 2011
- journal article
- Published by Japanese Society of Breeding in Breeding Science
- Vol. 61 (2), 130-141
- https://doi.org/10.1270/jsbbs.61.130
Abstract
Aegilops tauschii Coss., the D-genome progenitor of hexaploid wheat, has a wide species range in central Eurasia. Large natural variation in Ae. tauschii offers potential for improving modern varieties of common wheat. Maturation time, an important agronomic trait for wheat breeding, is tied to flowering time and grain-filling period. Here, we established 82 wheat synthetic lines derived through endoreduplication, forming triploid gametes, in interspecific hybrids obtained by crossing a tetraploid wheat cultivar, Langdon, with 69 Ae. tauschii accessions. Empirical study of the hexaploid synthetics showed abundant variation in heading, flowering, and maturation time and the grain-filling period throughout the two growth seasons examined. The wide variation observed in heading time in Ae. tauschii was maintained in the hexaploid background of the synthetic wheat lines. Significantly positive correlations were observed among heading, flowering, and maturation time in the hexaploid synthetics. On the other hand, no significant correlations were found between grain-filling period and the other traits examined. Some comparisons between two selected synthetic wheat lines having similar flowering time stably exhibited differences in their grain-filling periods. These observations suggest that two major genetic pathways independently determine wheat maturation time; one controls heading and flowering time and the other regulates grain-filling period.Keywords
This publication has 44 references indexed in Scilit:
- A NEW SYNTHESIZED 6x-WHEATHereditas, 2010
- Hypersensitive Response-Like Reaction Is Associated with Hybrid Necrosis in Interspecific Crosses between Tetraploid Wheat and Aegilops tauschii CossPLOS ONE, 2010
- Control of flowering time and spike development in cereals: the earliness per se Eps-1 region in wheat, rice, and BrachypodiumFunctional & Integrative Genomics, 2009
- Variation in Dehydration Tolerance, ABA Sensitivity and Related Gene Expression Patterns in D-Genome Progenitor and Synthetic Hexaploid Wheat LinesInternational Journal of Molecular Sciences, 2009
- Genealogical analysis of subspecies divergence and spikelet-shape diversification in central Eurasian wild wheat Aegilops tauschii Coss.Österreichische botanische Zeitschrift, 2009
- Nonadditive Expression of Homoeologous Genes Is Established Upon Polyploidization in Hexaploid WheatGenetics, 2009
- Flowering Time Diversification and Dispersal in Central Eurasian Wild Wheat Aegilops tauschii Coss.: Genealogical and Ecological FrameworkPLOS ONE, 2008
- Genomewide Nonadditive Gene Regulation in Arabidopsis AllotetraploidsGenetics, 2006
- Stochastic and Epigenetic Changes of Gene Expression in Arabidopsis PolyploidsGenetics, 2004
- Resistance to Leaf Rust in Hexaploid Wheat: Lr32 a Third Gene Derived from Triticum tauschii1Crop Science, 1987