Factor Analysis and Genetic Gouping of Safflower (Carthamus tinctorious L.) Genotypes under Terminal Season Water Deficit Stress and Normal Condition

Document Type : Research Paper

Authors

1 Master Graduate, Islamic Azad University, Kermanshah Branch, Kermansh, Iran

2 Associate Professor, Department of Agronomy and Plant Breeding, Faculty of Agriculture, Lorestan University, Khorramabad, Iran

3 PhD Student, Department of Agronomy and Plant Breeding, Faculty of Agriculture, Lorestan University, Khorramabad, Iran

4 Associate Professor, Department of Agronomy and Plant Breeding, Faculty of Agriculture, Razi University, Kermanshah, Iran

Abstract

Decreasing crop production due to the global climate change, especially simultaneous appearance of drought and high temperature is being rose. Hence, understanding relationships among genotypes characteristics under drought stress will be crucial for selection and breeding of drought tolerant cultivars. In this research, in order to grouping and the study of genetic variability of safflower (Carthamus tinctorious L.) genotypes, 15 genotypes were cultivated based on a completely randomized design in Lorestan University (Khorramabad, Iran) Research Farm under normal and terminal season water deficit condition. Results of ANOVA and mean comparision showed significant differences among genotypes for studied traits under both conditions. The factor analysis technique introduced three factors under non-stress conditions which explained 79.40% of total variation. Factors I and II were named as grain yield component and efficiency, respectively. Similarly, three factors were intrtoduced under stress condition, and 59.09% of total variation was accounted by the first two factors. Factors I and II were described as grain yield and yield component factor, and growth and development factor, respectively. According to the cluster analysis, all genotypes were grouped into 3 groups in both normal and terminal season water deficit stress conditions. Totally, results of factor analysis, cluster analysis and mean comparison and also, stability of grain yield in both humidity conditions showed that genotype 6 (Syrian) could be introduced as a hopefull genotype for future breeding and agronomy programs.

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References

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Volume 12, Issue 1
June 2020
Pages 47-61

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