Shadmany J, Taylor PW, Yeap HL, Lee SF. Multi-locus genotyping of stored sperm reveals female remating rates in wild populations of the Queensland fruit fly.
CURRENT RESEARCH IN INSECT SCIENCE 2022;
2:100040. [PMID:
36003266 PMCID:
PMC9387433 DOI:
10.1016/j.cris.2022.100040]
[Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 03/28/2022] [Revised: 05/25/2022] [Accepted: 05/27/2022] [Indexed: 11/10/2022]
Abstract
Stored sperm in female Queensland fruit flies genotyped for 10 genetic markers
Remating detected in 26 of 48 (54.2 %) ovipositing females in the wild
Significant difference in remating rate between 2 collections (80.0 vs 26.1%)
First evidence for polyandry in wild female Queensland fruit flies
Female insects commonly have more than one mate during a breeding period (‘polyandry’), storing and using sperm from multiple males. In addition to its evolutionary significance, insect polyandry has practical implications for pest management that relies on the sterile insect technique (SIT). The Queensland fruit fly, Bactrocera tryoni (Froggatt), is a major horticultural pest in Australia, and outbreaks are managed by SIT in some regions. The present study provides the first evidence for polyandry in female B. tryoni from field populations from New South Wales (NSW) and Queensland (QLD) through multi-locus genotyping (ten microsatellite markers in four fluorescent multiplexes) of the stored sperm in ovipositing females. Polyandry level was significantly higher in the NSW collection (80.0 %) than the QLD collection (26.1 %), suggesting substantial regional and/or temporal variation. These findings have important implications for the use of SIT to suppress B. tryoni populations and to eradicate outbreaks.
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