Evaluation of the genetic diversity of resistance to Ascochyta blight and some of the most important traits related to chickpea yield under rainfed conditions

Document Type : Research Paper

Authors

1 M.Sc. Student, Persian Gulf University, Bushehr, Iran

2 Academic member of Persian Gulf University(Bushehr)

3 Associate scientist, Field and Horticultural Crops Science Dept., Kurdistan Agricultural and Natural Resources Research and Education Center, AREEO, Sanandaj, Iran

4 Assistant Professor, Persian Gulf University, Bushehr, Iran

Abstract

This study was conducted to assess the relationship of some yield related traits and relative resistance to ascochyta blight disease in 36 Kabuli chickpea genotypes. Field trial was conducted in a simple lattice design with two replications and the genotypes resistance was assayed in a factorial experiment (factors include genotype and some disease pathotypes reported of Iran) based on randomized complete block desingn with three replications. Various phenological and morphological traits, yield, yield components and some of traits related to resistance were measured. Significant differences were showed between genotypes for number of empty pods, number of main branches and days to maturity at 5% and for yield, plant height and 100-kernel weight at 1% probability level. Genotype 32 with an average of 119.29 grams grain per square centimeter had the highest yield. The number of pods and number of seed per plant had the highest correlation(r=0.57**) with grain yield. Stepwise regression analysis introduced number of seeds per plant, number of seeds per pod and plant height with 51% justify changes as most effective traits. Path analysis result showed that the number of seeds per plant has the most direct effect (-0.39) on grain yield. In disease resistance assaying, Effects of genotypes, pathotypes and their interaction were significant at 99% probability. Cluster analysis set the genotypes into three groups; resistant, tolerant and sensitive. 11, 4 and 20 genotypes were placed in resistant, tolerant susceptible groups, respectively. Genotype 20 was highly resistant and genotypes 30 and 32 were identified as highly susceptible.

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Main Subjects

References

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Iranian Journal of Field Crop Science
Volume 48, Issue 2 - Serial Number 2
September 2017
Pages 453-463

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History

  • Receive Date: 14 February 2016
  • Revise Date: 13 April 2016
  • Accept Date: 31 July 2016
  • Publish Date: 23 August 2017

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