Sequential Path Analysis of Yield Components in Potato |
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| Authors: | Rasool Asghari-Zakaria Mojtaba Fathi Davood Hasan-Panah |
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| Institution: | (1) Department of Crop Production and Breeding, Faculty of Agriculture, Mohaghegh Ardabili University, Ardabil, Iran;(2) Agricultural Support System Company, Ardabil, Iran;(3) Agriculture Research Center of Ardabil, Ardabil, Iran |
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| Abstract: | In order to determine proper selection criteria for tuber yield in potato clones obtained from true potato seed (TPS) and
to evaluate relationships between tuber yield and its components, an investigation was conducted using the five check cultivars
Agria, Marfona, Draga, Agata, and Arinda, and 120 potato clones obtained from TPS. The study was conducted in an augmented
randomized complete block design with three replications. Yield and its components were recorded. Correlation coefficient
analysis showed that tuber yield had significant positive associations with number of tubers per plant, average weight per
tuber (tuber size), plant height, diameter of main stem, and number of main and secondary stems per plant, whereas its correlation
with tuber dry-matter concentration was significantly negative. Number of tubers per plant, tuber size, and plant height had
significant standardized partial regression coefficients with very small tolerance and large variance inflation factor (VIF)
values. These were considered as the first-order variables in sequential path analysis. |
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| Keywords: | Clonal selection Correlation coefficients Solanum tuberosum L |
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