Pre-harvest sprouting tolerance of different winter triticale cultivars in the Baltic Sea area |
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| Authors: | M Alaru Ü Laur E Lauringson |
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| Institution: | 1. Institute of Agricultural and Environmental Sciences , Estonian Agricultural University , Tartu, Estonia malaru@hot.ee;3. Institute of Agricultural and Environmental Sciences , Estonian Agricultural University , Tartu, Estonia |
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| Abstract: | Abstract Experiments were carried out to investigate 10 winter triticale cultivars for 1) genetic variability of patterns of resistance to pre-harvest sprouting, and 2) the simultaneity of seed maturation in spikes by determining the developmental stage and by measuring the rate of germination before and after physiological maturity. The cultivars used were Dagro, Fidelio, Lamberto, Lasko, Lupus, Modus, Prego, Tewo, Ulrika and Vision, and were compared by measuring the post-harvest grain falling number and by germination tests on harvested spikes during the grain filling period. Winter rye Vambo and winter wheat Kosack were used as controls. The moisture content of kernels at physiological maturity (PM) was affected by climatic conditions (r=0.38; p<0.05). Germination rate of kernels in spike before PM was influenced by cultivar only up to 17%; mostly it was affected by climatic conditions (coefficient of determination, 54%). Kernel germination rate after PM was dependent on cultivar up to 37%, but was dependent on precipitation amounts in August (coefficient of determination, 60%). The most resistant cultivar to germination during post-physiological maturity period was Modus, followed by Dagro and Prego. Kernels’ germination rate after PM was found to be an appropriate measure for selection of promising triticale cultivars for the climatic conditions, which are specific for the locations studied. The desiccation rate after PM affected significantly the duration of the period from PM up to harvest time (r=?0.50; p<0.01). |
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| Keywords: | Desiccation rate germination rate physiological maturity |
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