Life cycle expression of inbreeding depression in Eucalyptus regnans and inter-generational stability of its mixed mating system.

ABSTRACT:

Background and aims

Many plants exhibit a mixed mating system. Published models suggest that this might be an evolutionarily stable rather than a transitional state despite the presence of inbreeding depression, but there is little empirical evidence. Through field experimentation, we studied the role of inbreeding depression in eliminating inbred progeny from the reproductive cohort of the forest tree Eucalyptus regnans, and demonstrate a stable mixed primary mating system over two successive generations.

Methods

Two field experiments were conducted using seed from natural populations. We sowed open-pollinated seeds to simulate a natural regeneration event and determined isozyme genotypes of dominant and suppressed individuals over 10 years. We also planted a mixture of ope

SUBMITTER: Griffin AR 

PROVIDER: S-EPMC6676386 | biostudies-literature | 2019 Aug

REPOSITORIES: biostudies-literature