The Rate of Reproduction - Genetic Diversity in Establishing Plant Populations: Founder Number and Geometry - page 141

4600

i

A

g

i

g

3680

i

g

i

g

g

2760

i

g

i

g

i

g

1840

c

i

g

c

c

g

c

i

c

g

920

c

i

c

g

c

i

c

g

c

i g

c

a

c a a

g a

i c a

a a

g c a a

i c a a a

0

a c g i a c g a c a a a

0 6 12 18

1.00

a gg i i

c a c

B

a i

g

c

0.95

g i

c

i

g

a i

g i

g i

c g i

g i

g i

g i

c g i

g i

0.90

a

g i

c g

g

g

c g

c

c

c

c

c

c c

c

c

a c

0.85

a

a

a

0.80

a

a

a

a

a

a

a

a

a

0.75

0 6 12 18

GENERATION

Fig. 10.1 Change in mean population size (A) and observed heterozygosity (B) across
generations for populations with identical initial input conditions except for the rate of
reproduction, r, which is: trial population a = 1.3; c = 1.78; g = 2.8, i = 4 (the input-requested
number of generations for population i was 14 rather than 17 as for the others). Means are
based on 30 replicate runs per trial.

Effect of Increasing Reproduction Rate on Subdivision

Under the conditions of an earlier example, it was shown that dividing the
20 founders into four or fi ve separated groups may increase the retention
of unique alleles compared to maintaining the 20 founders in one group,
but subdividing founders also increases loss of observed heterozygosity
due to increased F values (Figs. 9.11 and 9.12). This latter fi nding comes
as no great surprise, since dividing the founders into separated groups