Genetic diversity of oily sunflower lines under normal and salt stress conditions using multivariate statistical analysis methods

Document Type : Research Paper

Authors

1 Ph.D. Student, Department of Agronomy and Plant Breeding, Faculty of Agriculture, University of Mohaghegh Ardabili, Ardabil, Iran

2 Associate Professor, Department of Agronomy and Plant Breeding, Faculty of Agriculture, University of Mohaghegh Ardabili, Ardabil, Iran

3 Professor, Department of Plant Breeding and Biotechnology, Faculty of Agriculture, Urmia University, Urmia, Iran

4 Professor, Institute of Biotechnology, Urmia University, Urmia, Iran

Abstract

To study genetic diversity of some agronomic traits and the effect of salt stress on these characters, 100 oily sunflower inbred lines coming from different regions of world was investigated under normal and salt (8 dS/m) stress conditions with randomized complete block design with three replications outside the greenhouse in an open air area. Analysis of variance showed significant differences among lines for all studied traits, indicating the existence of genetic variation among genotypes. The highest coefficient of genetic variation was observed for head dried weight, seed yield per plant and the lowest one for days to flowering in both stressed and non-stressed conditions. The results of correlation analysis revealed significant and positive correlation between seed yield per plant with most of the studied traits in both stressed conditions. Stepwise regression analysis revealed that under salt stress conditions, 40.3 percent of seed yield per plant variation was determined by head diameter, 100 seed weight, bottom leaf length, leaf number, bottom petiole length, upper leaf width and chlorophyll rate and in normal conditions, 30.3 of seed yield per plant variation was explained by head diameter, 100 seed weight and plant height. Cluster analysis grouped lines into 6 clusters in normal and 5 clusters in salt stress conditions but the distribution of lines within groups were different depending to stress environments that present the genetic variability for salt tolerance in sunflower lines. Lines 6, 11, 13 and 70 had the highest yield per plant under normal and salt stress conditions.

Keywords

Main Subjects

References

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Iranian Journal of Field Crop Science
Volume 48, Issue 2 - Serial Number 2
September 2017
Pages 399-411

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History

  • Receive Date: 08 March 2016
  • Revise Date: 13 June 2016
  • Accept Date: 18 June 2016
  • Publish Date: 23 August 2017

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