Question

The average viability of seeds produced by forced selfing (inbreeding) in a plant breeding experiment was 0.5 while the average viability of seeds produced by natural outcrossing in the same experiment was 0.95. What is the value of the inbreeding depression coefficient in this population?

A = 0.5 B = 0.47 C = 0.52 D = 0.95 E = none of the above

25. The value of d for the above population indicates

A = evidence for inbreeding B = evidence for inbreeding depression C = evidence for outbreeding depression D = evidence of recent migration E= no evidence for inbreeding depression

I just need help with 25, PLEASE explain how you got the answer!!

Thank you!

Answer 1

First calculating the inbreeding depression from the above data.

H​​​​​​e = Expected heterozygosity

H​​​​​​o = Observed heterozygosity

Average viability of seeds produced by natural outcrossing (H​​​​​​e ) = 0.95

Average viability of seeds produced by forced selfing (inbreeding) (H​​​​​​o ) = 0.5

Inbreeding depression coefficient =

=

=

D = 0.47

Since D is not equal to zero so there is inbreeding.

?If D= 0 then there is no Inbreeding.

?D is not equal to one => No complete inbreeding.

?If D value is less then less inbreeding but if it was greater there would have been significant inbreeding.

The correct answer is B. evidence for inbreeding depression.