Evaluation of selected traits of winter wheat collection as for occurence of dwarfing genes (Rht)
1999
Tisova, V.
In 1997-1998 in VURV Piestany a collection of 70 new varieties and newbreedings of winter wheat was tested in plant height, yield-forming and qualitative traits were evaluated and presence as well as influence of Rht genes on these elements were studied. As could be see from the results, the average plant height of the collection at the genotypes where presence of Rht genes was identified was lower than at genotypes of transient type. Genotypes with presence of Rht genes had the highest grain yield, number of spikes per area unit and number of grains in a spike. Negative highly-significant correlation ratio was found (r = -0.415++) between plant height and number of grains in a spike at genotypes with Rht genes and positive highly-significant ratio (r = 0.392++) between the plant height and TGW at genotypes with dwarfing Rht genes. Highly-significant correlation ratio (r = 0.551++) was found between grain yield and spike number per area unit at genotypes with dwarfing genes and without them (r = 0.748++) and significant correlation (r = 0.323+) between the grain yield and number of grains in a spike at genotypes with Rht genes. The highest TGW was found in high-stemmed genotypes and the said was going down through the genotypes of transient type and reached the highest values at genotypes with Rht genes. The highest protein content was found at genotypes of transient type and the highest values of sedimentation test at genotypes with Rht genes. Negative highly-significant correlation ratio was found (r = -0.463++) between protein content and sedimentation test at genotypes with Rht genes and also without Rht genes (r = -0.576++). The grain yield as well was in negative correlation (r = -0.362+) with protein content at genotypes with Rht genes and without them (r = -0.452+). Genotypes with the best parameters of evaluated traits and with presence of Rht genes are recommended for use in breeding programs on dwarfing as perspective parental forms
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