Evaluation of genetic diversity and relation among traits in advanced forage-grain sorghum lines under low-irrigation conditions

Document Type : Research Paper

Authors

1 M.Sc. Graduate of Plant breeding, Department of Crop Science and Plant Breeding, Faculty of Agriculture, Shahed University, Tehran, Iran.

2 Department of crop science and plant breeding, Faculty of Agriculture. Shahed university, Tehran, Iran

3 Associate Professor of Seed and Plant Improvement Institute, Agricultural Research, Education and Extension Organization (AREEO), Karaj, Iran

Abstract

To evaluate the tolerance to low irrigation stress in advanced forage-grain sorghum lines, an experiment was performed as split plots in randomized complete block design with three replications in Seed and Plant Improvement Institute (SPII), Karaj, Iran. In this experiment, low irrigation regimes as the main factor at two levels (120- and 240-mm evaporation from the surface of the Class A evaporation pan) and sorghum lines as sub-plot at 8 levels (KDFGS1, KDFGS6, KDFGS9, KGFGS10, KDFFGSD, KDFGS14, KDFGS16) were evaluated. There was a significant difference among the studied sorghum lines in terms of all traits except stem diameter and 1000-seed weight. The effect of the interaction of irrigation regimes and lines was significant at plant height and dry forage weight and was not significant in others. The correlation between panicle weight and forage yield was not significant in both irrigation regimes.  In both irrigation regimes, although the lines KDFGS1, KDFGS6, KDFGS9, KGFGS10, KDFGS12, KDFGS13, KDFGS14, KDFGS16 were grouped in the first cluster and the KDFGS14 line alone was arranged in the second cluster, but the genetic distance among lines was different in irrigation conditions.  In factor analysis, although, the studied traits were reduced to three factors in both irrigation regimes, in irrigation 120 mm panicle weight, forage weight and stem diameter, and in irrigation 240 mm panicle weight, harvest index, forage weight, and amount of stem and panicle were determined the most effective traits. KDFGS14 sorghum line is recommended as a superior line due to its superiority in traits related to yield.

Keywords

References

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Cereal Research
Volume 10, Issue 3
February 2020
Pages 273-283

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