Table 6 Inheritance of homostyly in later generation crosses

From: Inheritance of spontaneous mutant homostyles in Turnera subulata × krapovickasii and in autotetraploid T. scabra (Turneraceae)

 

Cross

Short

Homo

Long

G

P

(a) ‘F 2 s’ tested against expected ratio of 3 homostyle: 1 long

K12Lmho-4 H selfed

(SHs × SHs)

0

65

16

1.25

0.26

K12Lmho-3 H selfed

(SHs × SHs)

0

18

3

1.45

0.23

Pooled

 

0

83

19

2.36

0.13

Heterogeneity

    

0.35

0.55

(b) ‘Backcrosses’ into T. krapovickasii genetic background, tested against expected ratio of 1 homostyle: 1 long

K12L × K12Lmho-4H

(ss × SHs)

0

16

10

1.40

0.24

K12L × K12Lmho-3H

(ss × SHs)

0

41

36

0.32

0.57

Pooled

 

0

57

46

1.18

0.28

Heterogeneity

    

0.55

0.46

(c) ‘Backcrosses’ into T. subulata genetic background, tested against expected ratio of 1 short : 1 homostyle

 (i) Pollen parent heterozygous, SSH

S16L × Mhbry-9Sa

(ss × SHS)

133

36

0

59.22

<0.001

S16L × Mhbry-9Sb

(ss × SHS)

95

13

0

70.30

<0.001

S16L × Mhbry-14S

(ss × SHS)

83

23

0

36.06

<0.001

Pooled

 

311

72

0

160.07

<0.001

Heterogeneity

 

—

—

—

4.84

0.09

 (ii) Ovule parent heterozygous, SSH

Mhbry-9S × S16L

(SHS × ss)

59

29

0

10.44

<0.001

Mhbry-9S × S16Lb

(SHS × ss)

121

118

0

0.01

0.95

Pooled

 

180

147

0

3.34

0.07

Heterogeneity

 

—

—

0

7.14

0.008

Pooled reciprocals

 

491

219

0

106.91

<0.001

Heterogeneity comparing pooled reciprocals

  

—

—

57.17

<0.001

Heterogeneity for all 5 crosses

 

—

—

—

69.14

<0.001

  1. Segregation ratios, goodness of fit and heterogeneity tests are provided. Putative parental genotypes are provided in parentheses.
  2. aResults of this cross were reported previously (Athanasiou et al, 2003).
  3. bSecond grow out of additional progeny from these crosses.
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