Genetic variability and heritability of yield and its components by wheat (Triticum aestivum L.)

Ginka Rachovska, Zlatina Uhr

Abstract: Six F2 hybrid populations, including 7 varieties of common wheat (Triticum aestivum L.) were studied for genetic variability, heritability and genetic advance of yield and its components during the period 2009/2010. Heritability in the broad sense (H2) was computed following Mahmud and Kramer (1951) and genetic advance (GA) was calculated using the formula of Falconer and Mackay (1996). Based on estimated genetic parameters, we can conclude that the selection in F2 populations by grain yield per plant is most effective, and by length of the main spike and grain yield from the main spike is not effective and may be delayed for later (next/following) generations. The Crosses (Nikki × Prelom) F2, (Farmer × Guinness) F2 and (Vselena × Junak) F2 at this stage show the highest potential having in the mind the high averages values of studied parameters, coefficients of heritability and expected genetic advance.

Keywords: genetic variability; heritability; wheat; yield

Date published: 2017-08-03