Single nucleotide polymorphisms within the estrogen receptor beta gene are linked with reproductive indices in Japanese flounder, Paralichthys olivaceus.
The objectives of this study were to characterize polymorphisms within the coding region of estrogen receptor beta (ERbeta) gene in a population of 57 female Japanese flounder (Paralichthys olivaceus) and to analyze the association of ERbeta polymorphisms with reproductive indices by polymerase chain reaction single-strand conformation polymorphism (PCR-SSCP). Two single nucleotide polymorphisms (SNPs), SNP1 (c.577delC) and SNP2 [c.A891T (p.Gln114Leu)], were identified in the ERbeta gene. A one-way ANOVA revealed that SNP1 was significantly associated with the gonadosomatic index (GSI) in female Japanese flounder (P < 0.05). And SNP2 was significantly associated with the serum 17beta-estradiol (E2) level and GSI (P < 0.05). Individuals with genotype AB of SNP2 had significantly higher serum E2 level and GSI than those of genotype AA (P < 0.05). Moreover, the hepatosomatic index (HSI), a marker for genetic effects, was significantly higher for diplotype D2 compared with the other three diplotypes (P < 0.05). These results obtained in this study suggested that SNP2 could influence reproductive endocrinology of female Japanese flounder and be useful as a potential candidate genetic marker for the selection of reproductive indices in female Japanese flounder.
Fisheries College, Ocean University of China, Qingdao 266003, China.
Bao
B
Shi
Hai Shen
HS
Wen
Feng
F
He
Shuang Lin
SL
Dong
Shen
S
Ma
Cai Fang
CF
Chen
Xiao Yan
XY
Chen
Jia
J
Ren
Zhang
Guo Xiong
GX
Jin
D000818:Animals; D001483:Base Sequence; D004958:Estradiol / Q000378:metabolism; D047628:Estrogen Receptor alpha / Q000235:genetics*; D005260:Female; D029941:Fish Proteins / Q000235:genetics*; D005432:Flounder / Q000235:genetics* / Q000378:metabolism / Q000502:physiology*; D005838:Genotype; D009154:Mutation; D016133:Polymerase Chain Reaction; D020641:Polymorphism, Single Nucleotide / Q000235:genetics*; D018807:Polymorphism, Single-Stranded Conformational; D012098:Reproduction / Q000235:genetics*; D013739:Testosterone / Q000378:metabolism
D047628:Estrogen Receptor alpha; D029941:Fish Proteins; D013739:Testosterone; D004958:Estradiol