Molecular characterization of the ghrelin and ghrelin receptor genes and effects on fat deposition in chicken and duck.
Ghrelin (GHRL) and its receptor (GHSR) are involved in various bioactivities. In this study, the complete cDNA and 5' flanking region of the duck GHRL (dGHRL) gene and a 3717 bp fragment of the duck GHSR (dGHSR) gene were obtained. A total of 19, 8, 43, and 48 SNPs identified in 2751, 1358, 3671, and 3567 bp of the chicken GHRL (cGHRL), chicken GHSR (cGHSR), dGHRL, and dGHSR genes, respectively. Both cGHRL and dGHRL were expressed predominantly in the proventriculus, whereas the highest mRNA levels of cGHSR and dGHSR were detected in the breast muscle and pituitary. Association analysis showed that C-2047G, A-2355C, and A-2220C of the cGHRL gene were significantly associated with abdominal fat weight (AFW; P = .01), crude protein content of leg muscle (CPCLM; P = .02), and CPCLM (P = .0009), respectively. C-1459T of the cGHSR gene was also significantly associated with CPCLM (P = .0004). C-729T of dGHRL and A3427T of dGHSR were both significantly associated with subcutaneous fat thickness (SFT; P = .04). It was indicated by this study that the GHRL and GHSR genes were related to fat deposition in both chicken and duck.
Nie
Q
Q
Department of Animal Genetics, Breeding and Reproduction, College of Animal Science, South China Agricultural University, Guangzhou 510642, China.
Fang
M
M
Xie
L
L
Peng
X
X
Xu
H
H
Luo
C
C
Zhang
D
D
Zhang
X
X
D050153:Abdominal Fat / Q000378:metabolism*; D000595:Amino Acid Sequence; D000818:Animals; D001483:Base Sequence; D001665:Binding Sites; D050218:Body Fat Distribution; D002645:Chickens / Q000235:genetics / Q000378:metabolism / Q000502:physiology*; D002874:Chromosome Mapping; D003001:Cloning, Molecular; D004372:Ducks / Q000235:genetics / Q000378:metabolism / Q000502:physiology*; D005260:Female; D054439:Ghrelin / Q000235:genetics* / Q000378:metabolism; D008297:Male; D008969:Molecular Sequence Data; D009928:Organ Specificity; D020641:Polymorphism, Single Nucleotide; D054440:Receptors, Ghrelin / Q000235:genetics* / Q000378:metabolism; D016415:Sequence Alignment; D050151:Subcutaneous Fat / Q000378:metabolism*; D014157:Transcription Factors
D054439:Ghrelin; D054440:Receptors, Ghrelin; D014157:Transcription Factors