Table 1 Selected significantly differentially expressed DNA damage repair genes: gene function and gene expression levels (shown as Z-scores) among the male meiocytes of temperate maize lines B73 and Mo17 and the tropical maize line CML228

Zyp1

Zm00001eb423930

-

1.40

0.86

0.89

-0.79

-0.88

-0.81

-0.67

Chromosome synapsis

Dmc1

Zm00001eb163340

-

0.10

0.61

1.44

-1.13

-1.16

-0.61

0.74

Homology search

Mer3

Zm00001eb184840

-

0.98

0.15

0.91

-1.32

-1.35

-0.15

0.77

Meiosis-specific DNA helicase

Zip4

Zm00001eb145140

Up

-0.29

1.13

1.71

-0.81

-0.75

-0.59

-0.39

Chromosome synapsis

Rad51d

Zm00001eb329200

-

-0.58

0.39

0.88

-1.10

-1.36

0.62

1.13

Homology search

Rad51e

Zm00001eb355220

-

0.73

0.09

1.29

-1.35

-1.19

-0.26

0.69

Homology search

Brca2

Zm00001eb419130

-

1.67

0.35

0.43

-1.29

-0.94

-0.53

0.30

Homology search

Tti2

Zm00001eb226270

-

1.24

0.33

0.91

-1.12

-1.42

-0.31

0.36

Stabilization of phosphatidylinositol 3-kinase-related kinases

Mlh1*

Zm00001eb362590

Up

1.19

-0.11

0.76

-0.92

-1.36

-0.55

1.00

Interference crossover formation

Mis12b

Zm00001eb065850

Up

0.29

0.98

1.64

-0.89

-0.93

-0.62

-0.46

Kinetochore protein

e2f12

Zm00001eb280090

-

0.46

-0.19

-0.22

-1.05

-1.14

0.35

1.78

Suppression of endocycle

e2f13

Zm00001eb194770

-

0.50

0.76

1.69

-0.85

-0.88

-0.83

-0.39

Suppression of endocycle

Atr1

Zm00001eb228310

Down

-1.12

-0.93

-0.63

1.09

1.44

-0.24

0.40

Regulating Dmc1 loading

Phr1*

Zm00001eb015750

-

-0.39

-0.96

-1.30

0.92

1.01

-0.39

1.12

DNA repair

Mus81 homolog2*

Zm00001eb141330

-

-0.27

-1.24

-0.94

1.07

1.41

-0.45

0.43

Noninterference crossover junction endonuclease

Mpk3

Zm00001eb013100

Down

-0.56

-0.71

-0.77

1.30

1.58

-0.25

-0.59

Cell cycle progression upon UVB stress