Performance of bmr 6 and 12 Sorghum Mutants in Different Wild Backgrounds Under Salinity


Sorghum is one of the bioenergy crops, with considerable tolerance to salinity. The current work was undertaken to assess the salinity tolerance of brown midrib (bmr) mutant lines and wild parents for biomass composition and potential theoretical ethanol yield (TEY). The variation for salinity levels in field plots was significant; hence, salinity screening under controlled environment was performed. The mutant line N 600 (bmr-12) had performed better under field screening (at 10 dS m−1) with fresh stalk yield of 17.3 t ha−1, dry stalk yield of 7.4 t ha−1, and grain yield of 2.0 t ha−1. The performance of bmr-6 and bmr-12 mutant alleles showed that bmr-12 allele, i.e., N 597 and N 600 had performed better than its wild types EHS and Atlas, respectively, for relative fresh and dry biomass index at 20, 40 and 80 days after imposing 150 mM salinity stress. The lines N 597 (13.05 cm2 g−1), N 596 (6.84 cm2 g−1) and N 593 (7.39 cm2 g−1) recorded the highest specific leaf area at 20, 40 and 80 days of stress, respectively. High membrane stability index was recorded in mutants N 596 (bmr-6-85.33%) and N 597 (bmr-12-84.78%) with EHS though under different genetic background under stress. Higher TEY was recorded in N 597 (2219.82 L ha−1), N 600 (2159.79 L ha−1), N 595 (2019.03 L ha−1) and N 598 (1945.33 L ha−1) under stressed conditions, with a moderate reduction of 47.85 and 47.50% in 2014 and 2015, respectively, in TEY.

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Fig. 1
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Bmr :

Brown midrib


International Crops Research Institute for the Semi-Arid Tropics


Soil plant analysis development


Specific leaf area


Membrane stability index


Seedling height reduction


Relative fresh biomass index


Relative dry biomass index


Neutral detergent fiber


Acid detergent fiber


Acid detergent lignin


Theoretical ethanol yields


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Correspondence to Srinivasa Rao Pinnamaneni.

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All the authors declare that there is no conflict of interest in publishing performance of bmr 6 and 12 sorghum mutants in different wild backgrounds under salinity in Sugar Technology.

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KS, V., H, L., GS, A. et al. Performance of bmr 6 and 12 Sorghum Mutants in Different Wild Backgrounds Under Salinity. Sugar Tech 20, 293–304 (2018).

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  • Brown midrib (bmr)
  • Biomass
  • Salinity
  • Sorghum
  • Membrane stability index (MSI)
  • Theoretical ethanol yield (TEY)