Improved Molecular Assay for Sex Identification of the Endangered Crested Ibis (Nipponia nippon) Based on the CHD1 Gene and a Sex-linked Microsatellite Locus
文献类型: 外文期刊
第一作者: He, Xue-Lian
作者: He, Xue-Lian;Ding, Chang-Qing;He, Xue-Lian;Han, Jian-Lin;Qing, Bao-Ping;Han, Jian-Lin
作者机构:
关键词: sex identification;crested ibis;Nipponia nippon;CHD1 gene;sex-linked microsatellite locus;conservation
期刊名称:ZOOLOGICAL SCIENCE ( 影响因子:0.931; 五年影响因子:1.036 )
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年卷期:
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收录情况: SCI
摘要: Sex identification of monomorphic birds, especially endangered avian species, is essential for ecological study and biodiversity conservation. In this study, two popular primer sets of 2550F/2718R and P2/P8, which were designed to amplify different fragments of chromodomain-helicase-DNA binding protein 1 (CHD1) genes mapped on both Z and W chromosomes in birds, were used to identify for the first time the sex of individuals of the endangered species crested ibis (Nipponia nippon) in a large number of samples. An improved primer set of 2467F/2530R was re-designed to be specific to crested ibis following their conserved sequences derived from the 2550F/2718R primers. PCR products of the new primers were conveniently visualized with two bands of 552 base pairs (bp) and 358 bp for females, but a single band of 552 bp for males in routine 1.8% agarose gel. Similarly, the P2/P8 primer set amplified two fragments of 398 bp and 381 bp from females but one fragment of 398 bp from males; however, a high resolution involving 10% polyacrylamide gel had to be employed to resolve the 17 bp insertions/deletions (in/dels) present between the two amplicons in females. In addition, a microsatellite locus NnNF05 was validated to be sex-linked and shown to be effective in the sexing of crested ibis, supporting its utility in non-invasive sampling. This study provides a rapid, convenient, and reliable molecular assay for improving sex identification in the monomorphic and monogamous crested ibis, and thus facilitates the selection of breeding pairs in captive programs and reintroduction initiatives.
分类号: Q95
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