Physiology and Molecular Biology of Plants

, Volume 25, Issue 2, pp 407–419 | Cite as

Seedling stage salt stress response specific characterization of genetic polymorphism and validation of SSR markers in rice

  • Rima Kumari
  • Pankaj Kumar
  • V. K. SharmaEmail author
  • Harsh Kumar
Research Article


Salt tolerance status at early seedling stage in 30 rice varieties including two tolerant (Pokkali and CSR-36) and two susceptible (IR-29 and IR-64) checks was assessed under different levels of salinity (0, 4, 8 and 16 dS m−1) created by salt mixture of NaCl, CaCl2, Na2SO4 in 7:2:1 ratio. Overall salinity tolerance indices clearly reflected that 17 varieties including the two tolerant checks were highly tolerant, seven varieties exhibited moderately tolerant, whereas six varieties including the two susceptible checks had highly susceptible response to salt stress. Molecular profiling of 13 tolerant and 5 susceptible rice varieties by using 24 SSR markers revealed 8.5 alleles per primer with altogether 114 shared and 91 unique allelic variants. Considering the allele number, polymorphism information content and polymorphism percent, SSR primers RM 302, RM 8094, RM 10665, RM 10694, RM 10748 and RM 10825 appeared to be highly polymorphic and comparatively more informative. Hierarchical classification and spatial distribution patterns based on amplification profiles dependent similarity indices unambiguously discriminated these 18 varieties in accordance with their salt tolerance response. Sequential exclusion of primers in further analysis led to validation of RM 140, RM 1287, RM 3412, RM 10745, RM 10764 and RM 10772 for their efficiency to distinguish salt tolerant varieties from susceptible ones. A specific combination of either four (RM 1287, RM 3412, RM 10764 and RM 10772) or even two markers (RM 1287 and RM 3412) also seemed to be equally effective in discrimination of entries according to their salt stress responsiveness. Principal coordinate analysis completely corroborated hierarchical classification of the varieties. Salt tolerance donors identified and SSR primers validated in the present study may be further utilized in the development of salt stress tolerant varieties of rice.


Rice Salt tolerance Principal component analysis SSR markers Principal coordinate analysis 



Cetyl trimethyl ammonium bromide


Completely randomized design


Polymorphism information content


Polymorphism percent


Quantitative trait locus


Simple sequence repeat


Polymerase chain reaction



Authors gratefully acknowledge the support of the Department of Plant Breeding and Genetics, Dr. Rajendra Prasad Central Agricultural University, Pusa (Samastipur), India for providing rice varieties utilized in the experiment and the Department of Agricultural Biotechnology and Molecular Biology, Dr. Rajendra Prasad Central Agricultural University, Pusa (Samastipur), India, for providing University Fellowship to the first author during the present investigation.


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Copyright information

© Prof. H.S. Srivastava Foundation for Science and Society 2018

Authors and Affiliations

  • Rima Kumari
    • 1
  • Pankaj Kumar
    • 1
  • V. K. Sharma
    • 1
    Email author
  • Harsh Kumar
    • 1
  1. 1.Department of Agricultural Biotechnology and Molecular BiologyDr. Rajendra Prasad Central Agricultural UniversityPusa (Samastipur)India

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