Rockefeller Team Completes Zebra Finch Genome, Uncovering 2,710 Missing Genes
Updated
Updated · Earth.com · Aug 7
Rockefeller Team Completes Zebra Finch Genome, Uncovering 2,710 Missing Genes
3 articles · Updated · Earth.com · Aug 7
Summary
89.9 million newly recovered DNA letters—7.8% of the genome—let Rockefeller researchers identify 2,710 genes that earlier zebra finch references had missed or misclassified, including 972 protein-coding genes.
The biggest gains came from finally reading 11 tiny repeat-rich chromosomes end to end; one newly resolved gene on chromosome 31 encodes a protein involved in nerve-cell signaling that scientists had thought the bird lacked.
The assembly also finished the female-only W chromosome, where repeats make up 83% and 11.5 million letters had previously gone unassembled, opening new work on sex differences in vocal learning.
Researchers also found a 716-letter repeat at every chromosome centromere and a candidate binding protein, though they said that mechanism still needs confirmation in living cells.
Six modeled gaps remain, the germline-restricted chromosome was not assembled, and the partly inbred captive birds may not capture all zebra finch variation, but the Cell study is already the species' new public reference.