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Hodnocení potenciálních donorů vyšší odolnosti k suchu u pšenice ozimé
Prokešová, Lenka
This work summarises the results of experiments with common wheat lines (T. aestivum L. emed. Fiori et Paol.) during the growing season 2013/2014. Field experiments were carried out in two locations -- Žabčice and Branišovice. Two winter wheat varieties (Etela and Meritto) commonly cultivated in the Czech Republic and 45 Syrian lines with potentially high drought tolerance were evaluated in this work as well as Syrian variety CHAM 6. Spikes analyses were performed and the evaluated characters included awn length, spike length, spike weight, spikelet number, rachis length, rachis segments number, grains per spike number, and grains per spike weight. We focused also on grain yield per plant and the weight of thousand grains. The effect of location was highly significant for both characters -- yield per plant was higher in Žabčice, thousand grain weight in Branišovice. Two quality indicators were assessed -- the content of proteins and starch. As to protein content, all lines and control varieties exceeded the standard given in ČSN 461100-2. The amount of starch was between 66 and 68 %. The response to day length was characterised according to the photoperiod loci Ppd-D1. Photoperiod insensitive allele Ppd-D1a was more common in lines of Syrian origin than sensitive allele Ppd-D1b. To evaluate the tolerance to drought the osmotic potential was determinated and the greatest ability of osmotic adjustment was found in line 27/1.
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