Table 4 Correlation coefficients of stress indices for grain yield (Kg Ha−1) for no stress (GY_NS) and high heat stress (GY_HT) and stress indexes for 20 wheat genotypes grown under stress and no-stress conditions.

From: Selection of heat stress tolerant wheat genotypes for desert environments

 

GY_HT

HM

GMP

YR

TOL

YI

YSI

STI

STE

RSI

GY_NS

0.589

0.733

0.814

0.052

0.519

0.589

− 0.052

0.837

− 0.052

− 0.052

0.006

0

< .0001

0.827

0.019

0.006

0.827

< .0001

0.827

0.826

GY_HT

 

0.978

0.947

− 0.774

− 0.385

1

0.774

0.933

0.774

0.774

 

< .0001

< .0001

< .0001

0.094

< .0001

< .0001

 < .0001

< .0001

< .0001

HM

  

0.992

− 0.634

− 0.198

0.978

0.634

0.984

0.634

0.634

  

 < .0001

0.003

0.403

< .0001

0.003

 < .0001

0.003

0.003

GMP

   

− 0.533

− 0.073

0.948

0.533

0.998

0.533

0.533

   

0.016

0.76

< .0001

0.016

 < .0001

0.016

0.016

YR

    

0.878

− 0.774

− 1

− 0.495

− 1

− 1

    

< .0001

< .0001

< .0001

0.026

< .0001

< .0001

TOL

     

− 0.385

− 0.878

− 0.03

− 0.878

− 0.878

     

0.094

< .0001

0.898

< .0001

< .0001

YI

      

0.774

0.933

0.774

0.774

      

< .0001

< .0001

< .0001

< .0001

YSI

       

0.495

1

1

       

0.026

< .0001

< .0001

STI

        

0.495

0.495

        

0.026

0.026

  1. HM: Harmonic Mean of yield; GMP; Geometric Mean Productivity; YR: Yield Reduction; TOL: Stress tolerance; YI: Yield index; YSI: Yield Stability index; STI: Stress Tolerance index; STE: Stress Tolerance Efficiency and RSI: Relative Stress index. Significant values are in [bold/italics].
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