CONTRIBUTION OF BREEDING TO YIELD AND QUALITY INCREASE IN WINTER WHEAT

Smišljenom rekombinacijom gena izvršene su promjene u pojedinim biljnim organima, prije svega visini biljke, visini stabljike i dužini klasa kod novih kultivara ozime pšenice što je rezultiralo i povećanjem uroda zrna u odnosu na standardnu sortu Žitarku. U prvoj grupi ispitivanih sorti povećani urod je bio za 6,65% veći u odnosu na Žitarku, u drugoj grupi 9,4%, u trećoj 10,82% a u četvrtoj grupi ispitivanih sorti 12,15%. Farinogramski i ekstenzogramski pokazatelji kakvoće kao i sadržaj ukupnih proteina u zrnu i sedimentacijska vrijednost brašna svrstavaju nove kultivare u vrlo kvalitetne sorte ozime pšenice. Ovo kontinuirano povećanje rodnosti i kakvoće genotipova je konkretan doprinos oplemenjivanja povećanju uroda i kakvoće ozime pšenice.In new varieties of winter wheat changes in some plant organs, such as plant height, stem height and ear length were achieved by the thoughtout gene recombination. These changes resulted with kernel yield improvement in comparison with standard variety Žitarka. In first group of examined varieties yield was for 6,65% higher than yield of Žitarka, in second group for 9,46% in third for 10,82% and in fourth group of examined varieties tor 12,15% higher. Pharinographic and extensographic index of quality, protein content in kernel and sedimentation values of flour classify new varieties in high quality winter wheat varieties. This continuity in increasing of genotypes yield and quality is concrete contribution of plant breeding to improving of winter wheat yield and quality