Table 4 Correlations analysis among maize yield and the parameters of grain and starch granule of superior and inferior grain.

From: Grain and starch granule morphology in superior and inferior kernels of maize in response to nitrogen

Grain morphology

Yield

S-Grain density

S-1000-grain weight

S-Length

S-Width

S-Thickness

S-geometric volume of grain

S-volume of grain

S-Surface area

S-Volume

I-Grain density

I-1000-grain weight

I-Length

I-Width

I-Thickness

I-geometric volume of grain

I-volume of grain

I-Surface area

S-Grain density

0.77**

1

                

S-1000-grain weight

0.76**

0.29

1

               

S-Length

0.90**

0.71**

0.69**

1

              

S-Width

0.85**

0.55*

0.86**

0.82**

1

             

S-Thickness

0.19

−0.28

0.63**

0.28

0.4

1

            

S-geometric volume of grain

0.85**

0.53*

0.86**

0.92**

0.96**

0.52*

1

           

S-volume of grain

0.65**

0.12

0.98**

0.59**

0.79**

0.69**

0.80**

1

          

S-Surface area

0.51*

0.55**

0.38

0.56**

0.62**

0.35

0.64**

0.28

1

         

S-Volume

0.54*

0.68**

0.38

0.59**

0.68**

0.09

0.64**

0.27

0.80**

1

        

I-Grain density

0.77**

0.88**

0.35

0.83**

0.60**

0.01

0.68**

0.2

0.67**

0.71**

1

       

I-1000-grain weight

0.82**

0.43

0.91**

0.76**

0.90**

0.57**

0.90**

0.86**

0.55*

0.45*

0.53*

1

      

I-Length

0.90**

0.65**

0.83**

0.87**

0.86**

0.41

0.88**

0.74**

0.58**

0.58**

0.67**

0.87**

1

     

I-Width

0.69**

0.45*

0.82**

0.72**

0.94**

0.50*

0.91**

0.75**

0.69**

0.71**

0.53*

0.84**

0.76**

1

    

I-Thickness

0.45*

0

0.76**

0.42

0.69**

0.48*

0.62**

0.79**

0.22

0.24

0

0.64**

0.61**

0.64**

1

   

I-geometric volume of grain

0.82**

0.51*

0.91**

0.84**

0.96**

0.53*

0.96**

0.84**

0.63**

0.63**

0.57**

0.91**

0.92**

0.93**

0.74**

1

  

I-volume of grain

0.74**

0.29

0.92**

0.66**

0.85**

0.62**

0.83**

0.89**

0.45*

0.33

0.37

0.98**

0.82**

0.79**

0.69**

0.87**

1

 

I-Surface area

0.07

0.08

0.01

0.03

0.12

0.05

0.07

0.01

0.46*

0.29

0.11

0.15

0.13

0.02

0.06

0.05

0.15

1

I-Volume

0.4

0.44*

0.17

0.46*

0.29

−0.1

0.31

0.13

0.34

0.36

0.43

0.25

0.42

0.09

0.14

0.25

0.2

0.63**

  1. S: Super grain; I: Inferior grain; *,**Correlations are significant at the 0.05 and 0.01 levels, respectively.