Table 2 Sex ratio of the progeny and results from hierarchical contingency analysis of population size, population sex ratio, and maternal gender impact on progeny sex ratio. (a) Summarized data and (b) hierarchical contingency analysis

From: Consequences of prairie fragmentation on the progeny sex ratio of a gynodioecious species, Lobelia spicata (Campanulaceae)

Parental population

Maternal hermaphrodite

Maternal female

 

N

%F

%H

N

%F

%H

(a) Summarized data

 Weston (SF)

86

19.8

80.2

76

61.8

38.2

 Hooper branch (LF)

147

4.8

95.2

138

62.3

37.7

 Witter's (SH)

266

26.7

73.3

72

40.3

59.7

 Revis (LH)

153

7.0

93.0

67

48.9

51.1

Model effect

df

LLR

P-value

   

(b) Hierarchical contingency analysis

 Pop size × pop sex ratio × maternal gender × progeny sex ratio

1

0.26

0.6101

   

 Pop size × pop sex ratio × progeny sex ratio

2

0.48

0.7866

   

 Pop size × maternal gender × progeny sex ratio

2

24.90

<0.0001

   

Pop size × progeny sex ratio (female plants)

2

0.87

0.6473

   

Pop size × progeny sex ratio (hermaphroditic plants)

2

41.66

<0.0001

   

 Pop sex ratio × maternal gender × progeny sex ratio

2

10.21

0.0061

   

Pop sex ratio × progeny sex ratio (female plants)

2

9.50

0.0087

   

Pop sex ratio × progeny sex ratio (hermaphroditic plants)

2

2.17

0.3379

   
  1. LLR=log-likelihood ratio; S=small pop; F=female bias; L=large pop; H=hermaphrodite bias.
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