Table 3 Coefficients of correlation for relative expression of the selected genes and the relative SPAD values

Rel. SPAD

0.09

0.02

−0.10

0.01

0

−0.16*

0.24**

−0.13

0.19*

0.34***

0.16*

0.09

−0.15

0.15*

Drought stress genes

A1

0.68***

0.68***

0.44***

0.76***

0.38***

0.15

0.10

−0.16

−0.12

0.14

0.18*

0.37**

−0.11

Dhn1

0.73***

0.35**

0.72***

0.64***

0.08

0.26**

−0.17*

−0.11

0.12

0.15

0.30*

−0.18*

GAD3

0.43***

0.84***

0.65***

0

0.17*

−0.31***

−0.28***

0.09

0.20*

0.34**

−0.34***

NADP_ME

0.49***

0.15

0.29*

0.15

−0.01

0.10

0.27*

0.24*

0.22

0.25*

P5CS2

0.50***

0.17*

0.13

−0.19*

−0.09

0.10

0.18*

0.40**

−0.18*

Leaf senescence genes

Contig7437

−0.17*

0.45***

−0.24**

−0.35***

0.18*

0.16*

0.21

−0.25**

GSII

0.09

0.55***

0.64***

0.47***

0.53***

0.18

0.44***

hv_36467

0.19*

−0.09

0.15

0.30***

0.03

0.01

LHC1b20

0.49***

0.38***

0.39***

0.10

0.39*

pHvNF-Y5α

0.42***

0.28***

−0.26*

0.41***

Genes out of GWAS^a

AVP1

0.46***

0.22

0.54***

ETFQO

0.17*

0.35*

SAPK9

0.06