University of Tehran perss Journal of Crops Improvement 2008-8337 26 4 2024 12 21 Canonical Correlation Analysis between Yield and Yield Components with Root Traits in Bread Wheat Genotypes under Conditions of Moisture Stress of the Flowering Stage in Greenhouse Environment Canonical Correlation Analysis between Yield and Yield Components with Root Traits in Bread Wheat Genotypes under Conditions of Moisture Stress of the Flowering Stage in Greenhouse Environment 727 745 97123 10.22059/jci.2024.359433.2815 FA Behnam Tahmasebpour Ph.D Plant Breeding, Faculty of Agriculture and Natural Resources, University of Mohaghegh Ardabili 0000-0002-0710-8650 Sodabeh Jahanbakhsh Department of plant genetics and production engineering, Faculty of agriculture and natural resources, University of Mohaghegh Ardabili 0000-0002-8338-1069 Ali Reza Tarinejad Department of Agricultural Biotechnology, Faculty of Agriculture, Azarbaijan Shahid Madani University, Tabriz, Iran 0000-0002-8418-7663 Hamid Mohammadi Department of Agronomy and plant breeding, Faculty of Agriculture, Azarbaijan Shahid Madani University, Tabriz, Iran. 0000-0001-9451-3250 Ali Ebadi Department of plant genetics and production engineering, Faculty of agriculture and natural resources, University of Mohaghegh Ardabili 0000-0002-3951-6747 Journal Article 2023 05 17 <strong>Objective: </strong>This study aimed to investigate the relationships between traits and utilize these relationships to select high-yielding cultivars under normal irrigation and drought stress conditions at onset of the flowering stage.<br /><strong>Methods:</strong> To investigate the relationships between yield traits and their components with root traits, a split plot experiment was conducted based on a completely randomized experimental design with three replications. Thirty wheat genotypes were determined as secondary factors subjected to normal irrigation conditions and under moisture stress at the beginning of flowering at the research greenhouse of the Faculty of Agriculture of Shahid Madani University of Azerbaijan in 2015-2016.<br /><strong>Results:</strong> Under normal irrigation conditions in the greenhouse, the desirable criteria for increasing grain yield is a primary emphasis on root dry weight, followed by an emphasis on root volume as a secondary factor. Based on the results of the canonical correlation analysis under moisture-stress conditions in greenhouse, root traits, grain number per spike, total grain yield, root dry weight, root volume, and root number play a more critical role in increasing the 1000-grain weight, manifesting as predominant and influential factors.<br /><strong>Conclusion:</strong> According to results, several parameters such as the number of days to 50% flowering, shoot growth rate, malondialdehyde content, flag leaf area, 1000-grain weight, chlorophyll a content, carotenoid levels, peduncle length, dry root weight, root volume, and root number can be determined as appropriate indices for selecting high-yielding genotypes <strong>Objective: </strong>This study aimed to investigate the relationships between traits and utilize these relationships to select high-yielding cultivars under normal irrigation and drought stress conditions at onset of the flowering stage.<br /><strong>Methods:</strong> To investigate the relationships between yield traits and their components with root traits, a split plot experiment was conducted based on a completely randomized experimental design with three replications. Thirty wheat genotypes were determined as secondary factors subjected to normal irrigation conditions and under moisture stress at the beginning of flowering at the research greenhouse of the Faculty of Agriculture of Shahid Madani University of Azerbaijan in 2015-2016.<br /><strong>Results:</strong> Under normal irrigation conditions in the greenhouse, the desirable criteria for increasing grain yield is a primary emphasis on root dry weight, followed by an emphasis on root volume as a secondary factor. Based on the results of the canonical correlation analysis under moisture-stress conditions in greenhouse, root traits, grain number per spike, total grain yield, root dry weight, root volume, and root number play a more critical role in increasing the 1000-grain weight, manifesting as predominant and influential factors.<br /><strong>Conclusion:</strong> According to results, several parameters such as the number of days to 50% flowering, shoot growth rate, malondialdehyde content, flag leaf area, 1000-grain weight, chlorophyll a content, carotenoid levels, peduncle length, dry root weight, root volume, and root number can be determined as appropriate indices for selecting high-yielding genotypes https://jci.ut.ac.ir/article_97123_f571e1865bfa986776983c23b1525910.pdf