Testing winter wheat lines created at the agricultural research station of Podu-Iloaiei, Iaşi county

Abstract

During 2005-2007, at the Agricultural Research and Development Station of Podu-Iloaiei, Iaşi County, a site with different climatic conditions, the following wheat lines were tested: PI-2344-98, PI-2801-98, PI-2487-99, PI-2322-00, PI-2726-99, PI-2557-01, PI- 2416-95, PI-2657-99 and PI-2561-99, compared to the Fundulea 4 control. On this biological material, we have determined some physiological features and quantitative traits, production capacity, correlations between productivity and production elements. Under various climatic conditions, the lowest obtained yield was of 13 q/ha in PI-2657-99 and PI-2561-99 lines, in 2007, and the highest yield was of 72 q/ha in PI-2344-98 line, followed by PI-2801-98 line, with a yield of 71 q/ha, obtained in 2006. In most of the wheat lines, the mean yield on the three experiencing years was higher than the control, the distinctively significant yield increases reaching 9 q/ha (24%) in PI-2344-98 and PI-2726-99 lines. As concerns the number of spikes/m2, PI-2344-98 and PI-2726-99 lines had very significant yield increases, followed by PI-2487-99, PI-2322-00 and PI-2561-99 lines, with significant yield increases. As compared to the interaction genotype x environment, we have obtained statistically significant assured differences in PI-2726-99 line. The number of grains/ spike had higher statistically assured values against Fundulea 4 control in PI-2487-99 line. On average of three years, the 1000-grain weight had higher values against the control, the PI-2416-95 line being found on the first place (43.0 g). Compared to the V×A interaction, we did not get significant differences for the number of grains/spike and the 1000-grain weight, the tested genotypes reacting similarly to the change of climatic conditions at the experiencing period. The dependence between the studied traits and the production capacity was shown in most of cases by statistically assured positive correlations. The obtained results have demonstrated the success of PI-2344-98 and PI-2726-99 lines in the process of variety creation, corresponding to the objectives followed by wheat breeding at the Agricultural Research and Development Station of Podu-Iloaiei.