Unusual ancient gene governs sex of ant, bee, wasp newborns, PgII

Key Highlights:

• Studies in 2024 and 2026 revealed that sex determination in ants, bees, and wasps is governed by a non-coding DNA region.
• The ANTSR gene, which produces a long noncoding RNA, plays a crucial role in this process.
• Females typically develop from fertilized eggs with two chromosome sets, while males develop from unfertilized eggs with one.
• The research indicates that the ANTSR locus has been conserved for over 150 million years.
• This discovery has practical implications for monitoring and managing insect diversity, particularly in the order Aculeata.

Detailed Insights:

• The 2024 study on Argentine ants identified a specific genomic region where females had two different versions (mixed) and males had two matching versions of the ANTSR gene.
• The ANTSR gene influences the expression of tra, a gene involved in directing development towards male or female forms.
• The 2026 study found that the ANTSR locus is located between two protein-coding genes, CRELD2 and THUMPD3, across ants, bees, and stinging wasps.
• Complementary sex determination maintains many alleles in a population because matching at the locus produces sterile diploid males.
• Monitoring diversity at the sex locus can help breeders and conservation biologists manage matings or populations to reduce the chances of producing sterile males.

Scientific/Technical Concepts Involved:

• Diploid: Having two sets of chromosomes.
• Allele: A variant form of a gene.
• Noncoding RNA: An RNA molecule that is not translated into a protein.
• Heterozygous: Having two different alleles for a particular gene.