Molecular Method for Sex Identification of Half-Smooth Tongue Sole (Cynoglossus semilaevis) Using a Novel Sex-Linked Microsatellite Marker
文献类型: 外文期刊
第一作者: Liao, Xiaolin
作者: Liao, Xiaolin;Xu, Genbo;Chen, Song-Lin;Liao, Xiaolin;Liao, Xiaolin
作者机构:
关键词: Cynoglossus semilaevis;sex identification;sex-linked microsatellite marker (SLM);female-associated allele (FAA);multiplex PCR
期刊名称:INTERNATIONAL JOURNAL OF MOLECULAR SCIENCES ( 影响因子:5.923; 五年影响因子:6.132 )
ISSN: 1422-0067
年卷期: 2014 年 15 卷 7 期
页码:
收录情况: SCI
摘要: Half-smooth tongue sole (Cynoglossus semilaevis) is one of the most important flatfish species for aquaculture in China. To produce a monosex population, we attempted to develop a marker-assisted sex control technique in this sexually size dimorphic fish. In this study, we identified a co-dominant sex-linked marker (i.e., CyseSLM) by screening genomic microsatellites and further developed a novel molecular method for sex identification in the tongue sole. CyseSLM has a sequence similarity of 73%-75% with stickleback, medaka, Fugu and Tetraodon. At this locus, two alleles (i.e., A244 and A234) were amplified from 119 tongue sole individuals with primer pairs CyseSLM-F1 and CyseSLM-R. Allele A244 was present in all individuals, while allele A234 (female-associated allele, FAA) was mostly present in females with exceptions in four male individuals. Compared with the sequence of A244, A234 has a 10-bp deletion and 28 SNPs. A specific primer (CyseSLM-F2) was then designed based on the A234 sequence, which amplified a 204 bp fragment in all females and four males with primer CyseSLM-R. A time-efficient multiplex PCR program was developed using primers CyseSLM-F2, CyseSLM-R and the newly designed primer CyseSLM-F3. The multiplex PCR products with co-dominant pattern could be detected by agarose gel electrophoresis, which accurately identified the genetic sex of the tongue sole. Therefore, we have developed a rapid and reliable method for sex identification in tongue sole with a newly identified sex-linked microsatellite marker.
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