doiSerbia

Genetic correlations and path-coefficient analysis of yield and quality components in wheat, Triticum aestivum L.

Zečević Veselinka (Institut za istraživanja u poljoprivredi SRBIJA, Centar za strna žita, Kragujevac)
Knežević Desimir (Institut za istraživanja u poljoprivredi SRBIJA, Centar za strna žita, Kragujevac)
Mićanović Danica (Institut za istraživanja u poljoprivredi SRBIJA, Centar za strna žita, Kragujevac)

The genetic and phenotypic correlations between yield components (productive tillering, plant height, spike length, number of spikelets per spike, number of grains per spike, grain weight per spike, grain weight per plant, harvest index, thousand grain weight) and quality components (grain protein content and sedimentation value) were investigated. The plant material was comprised of 50 genotypes of winter wheat grown during two years. Path- coefficient analysis of genetic correlation coefficients for grain mass/plant and other traits determined interrelationships among grain mass per plant and other yield and bread making quality components. The strongest positive genetic correlation was found between grain weight per spike and thousand grain weight and between spike length and number of spikelets per spike. Phenotypic correlation analysis indicated that grain weight per spike correlated positively and significantly with harvest index and thousand kernel weight. The strongest direct effect on grain weight per plant had harvest index and number of spikelets per spike. The spike length through number of spikelets per spike had the strongest indirect effect on grain weight per plant.

Keywords: Triticum aestivum, genetic correlations, phenotypic correlations, path-coefficient analysis, yield components, bred making quality