A study on the wheat productivity criteria for the breeding of drought tolerant cultivars
1996
Boyadjieva, D. (Institute for Introduction and Plant Genetic Resources, Sadovo (Bulgaria))
For constructing a breeding strategy for productivity of winter wheat for the Bulgarian dry conditions, a comparative study of some old and modern cultivars was done, in order to determine in which characteristics the productivity of the modern genotypes registers a progress. That is why in 1993 and 1994 the modern cultivars Sadovo 1, Katya and Yantar were compared to the old ones N 14, N 301 and Okerman by the following characteristics: a/grain yield and biomass; harvest index and grain volume per unit area (grain sac); b/ spike characteristics; c/ leaf characteristics. A progress for a number of characteristics like grain yield, harvest index and spike yield was established. A progress was noted also for the newly introduced character - grain sac, the reduction of leaf area loss per leaf one week after flowering and the increase of the specific leaf weight. As mentioned above these characteristics could serve as criteria of breeding for productivity in particultural environments
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