Selection of Suitable Genotypes Based on Physiological and Morphological Traits in Rapeseed (Brassica napus L.)

Abstract

Aims: Rapeseed (Brassica napus L.) as one of the most important oilseeds in the world, has a special role in cultivation and plant breeding research. Especially, the properties of rapeseed oil compounds, which have high oleic acid, antioxidant and positive effects on cholesterol, blood sugar control, blood pressure and cancer, make it one of the healthiest and most important edible oils in the world and an alternative to use Other vegetable oils have been introduced in recent years. Evaluation of different genotypes of Rapeseed in terms of different traits and selection of the most appropriate genotypes can be effective in realizing the goals of plant breeding. Study Design:  In order to conduct the experiment, a randomized complete block design (RCBD) was used in three replications. Place and Duration of Study: This study was conducted in Varamin region of Iran in 2019-2020. Methodology: Each experimental plot had 4 rows of cultivation at a distance of 50 cm. The seeds were planted at a distance of 10 cm from each other and all steps such as watering and weeding were done regularly and manually. Results: The results of analysis of variance at the level of 0.01 indicated that the evaluated genotypes have significant differences in terms of all traits except the number of grains in the pod. In the means comparison of the traits, grain yield and oil percentage traits, which were selected as the most important traits, the Licord genotype was selected as the most favorable genotype. Based on the correlation analysis between the traits, the trait of grain yield had a positive and significant correlation with the traits of thousand grain weight, number of pods in the main stem, pod weight, days to flowering and oil percentage. Based on analysis of the main components, the first five components accounted for more than 74% of the variance of the total data. The drawn polygon diagram also identified Licord, Hyola-401, SLM046, Modena and Option 500 genotypes as desirable genotypes. Conclusion: Non-invasive independent predictors for screening esophageal varices may decrease medical as well as financial burden, hence improving the management of cirrhotic patients. These predictors, however, need further work to validate reliability.