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Table 3 Pearson correlation coefficients analysis among the value of turf quality (TQ), photochemical efficiency (Fv/Fm), chlorophyll content (Chl), photosynthesis rate (Pn), water use efficiency (WUE), electrolyte leakage (EL), leaf relative water content (RWC), root activity (RA) under heat stress conditions across 98 perennial ryegrass accessions

From: Natural variation of physiological traits, molecular markers, and chlorophyll catabolic genes associated with heat tolerance in perennial ryegrass accessions

 

PCA rank value

TQ

Fv/Fm

Chl

Pn

WUE

EL

RWC

RA

PCA rank values

1

        

TQ

0.744***

1

       

Fv/Fm

0.578***

0.750***

1

      

Chl

0.769***

0.814***

0.671***

1

     

Pn

0.304**

0.132

0.093

0.237*

1

    

WUE

−0.216*

−0.097

0.109

0.264**

0.259**

1

   

EL

−0.858***

−0.757***

−0.611***

−0.700***

−0.163

0.207*

1

  

RWC

0.764***

0.865***

0.729***

0.793***

0.099

−0.143

−0.807***

1

 

RA

0.502***

0.563***

0.459***

0.565***

0.073

−0.124

−0.411***

0.517***

1

  1. *, ** and *** indicate significance at P < 0.05, P < 0.01 and P < 0.001, respectively