3 research outputs found
Correlation and regression analysis in sorghum under different levels of nitrogen
An experiment was conducted with sorghum varieties and different levels of nitrogen to study the correlation between traits and to study the effect of these traits on grain yield to define which traits can be considered as selection criteria for yield improvement in sorghum. A factorial irrigated field experiment was carried out in R.C.B.D. layout with three replications in Iraq, four sorghum varieties (AlKhir, Enkath, Kafir, and Rabeh) were planted under three levels of nitrogen (80,100,120) kg/h manually in 2016 at two sites. After harvest, correlation and regression analysis were studied between grain yield as the dependent variable and each of the following traits as independent variables (dry and green fodder weight, leaf area index, plant height, stem diameter, grain number and grain weight, nitrogen level). Results showed that all studied traits except grain weight were highly significantly correlated with grain yield, and about 35% of variation in grain yield could be explained by the level of nitrogen fertilizer, and also showed that plant height and dry and green fodder weight were the major contributors towards grain yield since these traits explained about (57, 52, 50)% respectively of the variation of grain yield, followed by stem diameter and grain number then leaf area index, which might be a good traits to breeders for developing high yielding cultivars in sorghum
Gene action and some genetic parameters for grain yield, its components and growth traits of corn in full diallel cross
The objective of this study was to quantify gene action and some genetic parameters for grain yield, its components and other traits of six varietal hybrids and its parents (AM-145 (A), AM-153 (B) and AM-200 (C) obtained from Ministry of Agriculture, Iraq). All hybrids and their parental entries in full diallel cross were tested at Al-Gharraf suburb, 25 Km north of Al-Nasyria City, Iraq during fall 2013 in RCBD with three replications according to Griffing's fixed model, method for grain yield, its components and other agronomic traits. Gene action, general and specific combining abilities and broad and narrow sense heritability were estimated. Results showed significant differences among entries for almost all traits except ears/plant, and kernels weight. In addition to GCA and SCA significant variances, GCA variances were more important than SCA variances for all traits except ears/plant, which resulting the more importance of the additive genetic effects. SCA variances suggesting the importance the effects of non-additive effects for ears/plant which demonstrating entries could produce prolificacy plants. Additive genetic variances reflect its importance for all traits except female flowering and grain yield/plant. In general, the dominance degree average for all traits except grain yield/plant showed the over dominant effect and the narrow sense heritability ranged between 0.44-0.64 for female flowering and grain yield, respectively. Grain yield/plant ranged between 97.54- 68.44 g for B x A and C x B, respectively. Cytoplasmic heredity revealed its importance studying for all traits and 2GCA/SCA estimates ranged between 1.86 and 35.9 for ears/plant and female flowering, respectively. 
The Response of Wheat Cultivars Triticum aestivum L. to Various Growth Regulators Under Thi-Qar Province Condition
A field experiment is conducted at Thi-Qar Province in AL-Shatra District located about 30 Km North AL-Nassiria City to study the response of three wheat Cultivars Triticum aestivum L. to Growth regulators during 2014-2015 growing Season. The Cultivars are Latifia , AL-Rasheed and Iba 99. The growth regulators are Alga600, Atonik and Azomin32%. Factorial experiment in R.C.B.D. with three replicates is used . The results showed that Iba 99 Cultivar gives the highest plant height , Spikes/m2 and grain yield , with a means 80.83 cm , 272.25 spike/m2 and 3.06 Ton/h) Respectively . Azomin32% growth regulator gives the highest grain /spike , 1000 grain weight and grain yield , with a means 66.00 seed/spike ,43.55 gm , 272.33 spike/m2 respectively. In addition the interaction between Iba 99 Cultivar and Azomin32% growth regulator gives the highest Leaf Area , number of grain/spike and grain yield with means 45.10 cm2 , 70.00 grain/spike and 3.16 ton/ha respectively. The combination treatment Iba 99 with Atonik growth regulator gives the highest number of spike/m2 with a mean 279.66 spike/m2 . In the other hand, the same cultivar with Atonik and Azomin32% gives the highest mean of grain yield with a amount 3.16 ton/ha