ArticleScientific reports2024
Recombinase-aid amplification combined with lateral flow detection assay for sex identification of the great white pelican (Pelecanus onocrotalus).
Article in Scientific reports, 2024. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Not yet cited in PubMed.
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Abstract
Sex identification in avian species is essential for biodiversity conservation and ecological studies. However, the sex of nearly half of the birds could not be identified based on their external appearance. It is difficult to visually identify sex to monitor the ecology and conservation of wild populations. In this study, we designed primer pairs for large white pelican using recombinase-based isothermal amplification combined with a lateral flow dipstick (RAA-LFD) assay for chromo-helicase-DNA binding protein (CHD) genes mapped to W chromosomes and an ultra-conserved element (UCE) located on chromosome 6, respectively. Our result showed that the raaW4-RAA-LFD can detect up to 0.1 ng of genomic DNA (gDNA) templates of female pelicans in 30 min at 39 ℃ and accurately distinguish female from male without any cross reactivity. RaaUCE2-RAA-LFD can amplify both male and female pelicans with a detection limit of 25 pg. To further evaluate the assay, 15 white pelicans of unknown sex were tested using the RAA-LFD assay and conventional polymerase chain reaction (PCR). The results of the raaW4-RAA-LFD assay were consistent with those of the conventional PCR. The developed RAA-LFD assay is equipped with field-deployable instruments and offers a field platform for rapid and reliable sex identification in pelicans.
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