Satellite Symposium 5: Molecular Breeding
Description
Genes for freezing-tolerance and winter hardiness were located in Festuca pratensis by QTL analysis and introgression-mapping. QTL for freezing-tolerance on F. pratensis chromosome 4 were orthologous to rice chromosome 3, and Triticeae chromosome 5. Increased energy dissipation during the autumn through a lower maximum quantum yield of photosystem II (PSII) was correlated with improved winter survival. Freezing tolerance in Lolium was achieved by the transfer and subsequent expression of F. pratensis genes from chromosome 4 that govern the expression of a non-photochemical (NPQ) mechanism for the dissipation of excess light energy under low temperature.
Citation
Humphreys, M. W.; Gasior, D.; Kosmala, A.; Rognli, O. A.; Zwierzykowski, Z.; and Rapacz, M., "Locating, and Utilising Festuca Pratensis Genes for Winter Hardiness for the Future Development of More Persistent High Quality Lolium Cultivars" (2023). IGC Proceedings (1993-2023). 9.
https://uknowledge.uky.edu/igc/20/satellitesymposium5/9
Included in
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Locating, and Utilising Festuca Pratensis Genes for Winter Hardiness for the Future Development of More Persistent High Quality Lolium Cultivars
Genes for freezing-tolerance and winter hardiness were located in Festuca pratensis by QTL analysis and introgression-mapping. QTL for freezing-tolerance on F. pratensis chromosome 4 were orthologous to rice chromosome 3, and Triticeae chromosome 5. Increased energy dissipation during the autumn through a lower maximum quantum yield of photosystem II (PSII) was correlated with improved winter survival. Freezing tolerance in Lolium was achieved by the transfer and subsequent expression of F. pratensis genes from chromosome 4 that govern the expression of a non-photochemical (NPQ) mechanism for the dissipation of excess light energy under low temperature.
