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Sib-mating enhances fitness in a haplodiploid beetle
Year:
2022
Source of publication :
Evolution
Authors :
Harari, Ally
;
.
Kliot, Adi
;
.
Volume :
Co-Authors:

Aviad Moncaz
Rachel Ben-Shlomo
Yael Lubin
Adi Kliot
Ally Harari 

Facilitators :
From page:
0
To page:
0
(
Total pages:
1
)
Abstract:

Inbreeding is generally avoided in animals due to the risk of inbreeding depression following an increase in homozygous deleterious alleles and loss of heterozygosity. Species that regularly inbreed challenge our understanding of the fitness effects of these risks. We investigated the fitness consequences of extended inbreeding in the haplodiploid date stone beetle, Coccotrypes dactyliperda. We hypothesized that continuous inbreeding could result in reduced fitness, while outbreeding would either increase fitness due to heterosis or lower fitness if co-adapted gene complexes are disrupted. We established three breeding treatments with beetles from two geographically separated populations: Sib-mating (inbreeding), and outbreeding within and between populations. Between-population outbreeding groups of both populations had lower fecundity and collapsed before the experiment ended, while sib-mated and within-population breeding groups persisted for 10 generations. Sib-mated females had higher fecundity than within- and between-population outbreeding females. Inbreeding coefficients of sib-mated groups were higher than the other treatment groups, yet sib-mated beetles remained genetically polymorphic at the population level. Thus, there was no inbreeding depression, while crossing between distant populations led to outbreeding depression. Our findings are consistent with the life history of C. dactyliperda, in which sib-mating predominates within the date seed, but occasional within-population outbreeding may occur following local dispersal.

Note:
Related Files :
date seeds
Dispersal
inbreeding
mixed mating
outbreeding depression
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More details
DOI :
10.1093/evolut/qpac007
Article number:
0
Affiliations:
Database:
PubMed
Publication Type:
article
;
.
Language:
English
Editors' remarks:
ID:
63300
Last updated date:
23/01/2023 17:38
Creation date:
23/01/2023 17:38
Scientific Publication
Sib-mating enhances fitness in a haplodiploid beetle

Aviad Moncaz
Rachel Ben-Shlomo
Yael Lubin
Adi Kliot
Ally Harari 

Sib-mating enhances fitness in a haplodiploid beetle

Inbreeding is generally avoided in animals due to the risk of inbreeding depression following an increase in homozygous deleterious alleles and loss of heterozygosity. Species that regularly inbreed challenge our understanding of the fitness effects of these risks. We investigated the fitness consequences of extended inbreeding in the haplodiploid date stone beetle, Coccotrypes dactyliperda. We hypothesized that continuous inbreeding could result in reduced fitness, while outbreeding would either increase fitness due to heterosis or lower fitness if co-adapted gene complexes are disrupted. We established three breeding treatments with beetles from two geographically separated populations: Sib-mating (inbreeding), and outbreeding within and between populations. Between-population outbreeding groups of both populations had lower fecundity and collapsed before the experiment ended, while sib-mated and within-population breeding groups persisted for 10 generations. Sib-mated females had higher fecundity than within- and between-population outbreeding females. Inbreeding coefficients of sib-mated groups were higher than the other treatment groups, yet sib-mated beetles remained genetically polymorphic at the population level. Thus, there was no inbreeding depression, while crossing between distant populations led to outbreeding depression. Our findings are consistent with the life history of C. dactyliperda, in which sib-mating predominates within the date seed, but occasional within-population outbreeding may occur following local dispersal.

Scientific Publication
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