Table 2 Phenotypic, genetic and environmental variances (±SEM) in adult body mass, adult lifespan (lifespan postemergence from the host seed), and egg-to-adult development time

From: Evolutionary genetics of lifespan and mortality rates in two populations of the seed beetle, Callosobruchus maculatus

 

Variance components

 

Varcomp additive genetic variance (VA)

Jackknifed additive genetic variance (VA)

Environmental varianceb (VE)

Varcomp narrow-sense heritability (h2)

Jackknifed narrow-sense heritability (h2)

Adult body mass

 SI population

     

Female offspring

     

 Cowpea

0.335±0.141

0.328±0.167

0.579

0.367±0.145

0.348±0.173

 Mung

0.530±0.194

0.495±0.182

0.291

0.646±0.209

0.603±0.209

Male offspring

     

 Cowpea

0.252±0.126

0.218±0.084

0.391

0.392±0.184

0.288±0.141

 Mung

0.185±0.094

0.476±0.141

0.295

0.385±0.185

0.423±0.182

 BF population

     

Female offspring

     

 Cowpea

0.223±0.091

0.171±0.085

0.380

0.370±0.143

0.371±0.134

 Mung

0.451±0.148

0.206±0.087

0.315

0.589±0.173

0.608±0.167

Male offspring

     

 Cowpea

0.167±0.060

0.194±0.083

0.171

0.493±0.164

0.568±0.217

 Mung

0.168±0.063

0.168±0.058

0.214

0.440±0.151

0.430±0.140

Adult lifespan

 SI population

     

Female offspring

     

 Cowpea

13.98±7.09

16.49±7.73

36.52

0.277±0.135

0.300±0.134

 Mung

14.86±7.01

21.08±8.63

34.42

0.301±0.136

0.392±0.150

Male offspring

     

 Cowpea

13.39±4.53

8.95±4.69

7.15

0.652±0.192

0.699±0.309

 Mung

11.76±3.91

7.81±3.09

8.65

0.576±0.170

0.702±0.254

 BF population

     

Female offspring

     

 Cowpea

11.30±3.95

14.01±6.85

19.61

0.366±0.119

0.283±0.144

 Mung

8.03±2.72

14.71±6.45

16.10

0.333±0.106

0.315±0.126

Male offspring

     

 Cowpea

2.67±1.20

3.28±1.21

7.42

0.265±0.114

0.251±0.207

 Mung

3.33±1.05

3.21±1.46

2.91

0.534±0.151

0.509±0.218

Egg-to-adult development time

 SI population

     

Female offspring

     

 Cowpea

1.43±1.39

2.54±1.75

9.76

0.128±0.123

0.172±0.113

 Mung

8.49±5.61

20.83±19.63

22.91

0.270±0.174

0.538±0.442

Male offspring

     

 Cowpea

5.67±3.59

1.03±0.72

11.57

0.329±0.200

0.446±0.410

 Mung

8.54±6.93

−0.34±0.67c

28.91

0.228±0.181

0.190±0.264

 BF population

     

Female offspring

     

 Cowpea

0.21±0.62

9.76±8.54

4.84

0.042±0.122

0.239±0.198

 Mung

0a

9.04±11.32

5.33

0a

−0.071±0.160

Male offspring

     

 Cowpea

0a

0.23±0.65

5.77

0a

0.059±0.171

 Mung

0.03±0.59

0.99±0.95

6.14

0.004±0.096

0.199±0.192

  1. Genetic variances were calculated using the restricted maximum likelihood variance component estimation procedure of SAS Proc VARCOMP (Littell et al, 1991). Standard errors for h2 calculated following Becker (1992). See Fox (1998) and Fox et al (1999) for other examples of these procedures.
  2. aEstimated among-sire variance component was 0, resulting in a 0 VA and 0 h2.
  3. bEstimated assuming dominance, epistasis and maternal effects are 0. Neither maternal effects nor dominance explained more than 5% of the variance for any analysis except development time, for which maternal effects were often large, calculated from the restricted maximum likelihood variance component estimation procedure of SAS Proc VARCOMP.
  4. cAlthough genetic variances cannot be negative, the estimates from the jackknife pseudovalues can be negative.
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