اعلانات هامة

A studywas conducted to estimate grain yield stability for 15 single maize crosses and check (Pasel-1) produced from hybridization in line×testeranalysis method, at Raqqa Research Center (RRC) and Ali Baglih Research Station (ABRS), Raqqa governorate, Syria, in 2013. The experiments were arranged in a randomized complete block design with three replications. Stability parameters were asses to days to tasseling, plant height and grain yield. Eberhart and Russel model (1966) was used in this study. The model measured three stability parameters, i.e., mean grain yield of the variety, regression coefficient (bi) and mean square deviations (S2di) from linear regression. According to their model, a stable variety should have high mean grain yield, a regression coefficient of unity (bi=1) and a minimum deviation from the regression line or not significantly different from zero. The results showed highly significant differences for genotype-environment (G×E) interaction equal 6.9**, 89.5** and 2.9** for days to tasseling, plant height and grain yield,  respectively. The highest grain yield was recorded by IL.175-10×IL.356-10 (9.297 t/ha) and IL.175-10×IL.134-10 (8.188 t/ha) at two locations, but its b≈1 and its deviation was not significantly different from zero. This study indicate clearly to grain yield stability under the conditions of Raqqa governorate.

Key Words: Maize, stability, grain yield, single crosses