تقويم الأداء و تقدير المعالم الوراثية و الارتباطات لحنطة الخبز (Triticum aestivum L.)‎ بتأثير نظم الحراثة

Abstract EN

Six genotypes of bread wheat (Tamoz 2 , Tamoz 3 , IPA 99 , IPA 95 , Abu-ghraib 3 and AL- Rashed) were planted at the fields of College of Agriculture University of Tikrit in the season 2012-2013.

The treatments consist of two tillage systems (zero tillage and conventional tillage) using split plots system in rando- mized complete block design with three replications to evaluate grain yield and its components from other traits (flag leaf area and plant height and number of grains per m2 and number of grains per spike and 1000 grain weight and grain yield) in addition to estimation of some genetic parameters and correlations between grain yield and its components.

The results showed that conventional tillage system was surpassed for grain yield (4583.412) kgha and Abu-ghraib 3 was significantly sur- passed others for large number of traits including grain yield.

Genotypic variance was significant for all traits inclusive most of phenotypic variance which reversible on broad sense heritability value ranged between (0.70) for plant height to (0.99) for grain yield The genetic gain a values were moderate for flag leaf area and number of spikes per m2 and grain yield.

Phenotypic and genetic correlation was highly positively significant between grain yield and number of spikes per m2 there for this trait was important to use as a selection criteria for programes of wheat improvement.