Table 3 Markers with an extreme segregation ratio are present in the F2 maize population

From: The maternal cytoplasmic environment may be involved in the viability selection of gametes and zygotes

Chromosome Bin

Marker name

Cross direction

Cross direction

  

(JB × Y53) × (JB × Y53)

(Y53 × JB) × (Y53 × JB)

  

JB homozygotes

Heterozygotes

Y53 homozygotes

Number of missing

χ2-value

JB homozygotes

Heterozygotes

Y53 homozygotes

Number of missing

χ2-value

1.01

gst12

29

55

33

3

0.7

120

0

0

0

360**

1.01

bnlg1803

0

0

120

0

360**

33

66

19

2

5.0

1.07

umc1499

0

0

120

0

360**

9

31

79

1

109.7**

1.09

bmc1720

43

44

31

2

10.1**

120

0

0

0

360**

1.11

umc2241

20

71

29

0

5.4

120

0

0

0

360**

3.06

bnlg1951

18

60

40

2

8.2**

0

0

120

0

360**

3.09

bnlg1496

0

0

120

0

360**

25

55

32

8

0.9

3.10

umc1594

0

0

120

0

360**

33

60

25

2

1.1

4.11

umc1707

24

65

31

0

1.6

0

0

120

0

360**

7.00

bnlg2132

0

0

120

0

360**

25

57

32

6

0.9

7.05

bnlg1367

0

0

120

0

360**

31

52

22

15

1.6

7.05

umc2197

120

0

0

0

360**

81

0

35

4

152.5**

8.03

umc1473

0

0

120

0

360**

22

58

31

9

1.7

8.04

umc1415

0

0

120

0

360**

21

59

32

8

2.5

8.09

unc1005

27

67

23

3

2.7

120

0

0

0

360**

9.01

umc2084

24

68

28

0

2.4

0

0

120

0

360**

  1. These markers were not included in the linkage mapping because the effect of extreme segregation on the construction of linkage maps was not clear. In addition, the current version of PROC QTL cannot handle markers with extreme segregation ratios. The chromosome bins of these markers were identified according to IBM2 2005 Neighbours frame (http://www.maizegdb.org/), which showed the relative positions of these markers along the genome. **denotes significance at a 0.01 level.
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