SINE indel polymorphism of AGL gene and association with growth and carcass traits in Landrace x Jeju Black pig F(2) population.
Genetic polymorphisms in the glycogen debrancher enzyme (AGL) gene were assessed with regard to their association with growth and carcass traits in the F(2) population crossbred Landrace and Jeju (Korea) Black pig. Three genotypes representing the insertion and/or deletion (indel) polymorphisms of short interspersed nuclear element were detected at frequencies of 0.278 (L/L), 0.479 (L/S), and 0.243 (S/S), respectively. The AGL S allele-containing pigs evidenced significantly heavier body weights at birth, the 3rd week, 10th week, and 20th week during developmental stages and higher average daily gains during the late period than were noted in the L/L homozygous pigs (P < 0.05), respectively. However, average daily gains during the early period were not significantly associated with genotype distribution (P > 0.05). With regard to the carcass traits, the S allele pigs (S/-) evidenced significantly heavier carcass weights and thicker backfat than was measured in L/L homozygous pigs (P < 0.05). However, body lengths, meat color, and marbling scores were all found not to be statistically significant (P > 0.05). Consequently, the faster growth rate during the late period and backfat deposition rather than intramuscular fat deposition cause differences in pig productivity according to genotypes of the AGL gene. These findings indicate that the AGL genotypes may prove to be useful genetic markers for the improvement of Jeju Black pig-related crossbreeding systems.
Han
Sang-Hyun
SH
Jeju Sub-station, National Institute of Animal Science, RDA, Jeju, Korea.
Shin
Kwang-Yun
KY
Lee
Sung-Soo
SS
Ko
Moon-Suck
MS
Jeong
Dong Kee
DK
Oh
Hong-Shik
HS
Yang
Byoung-Chul
BC
Cho
In-Cheol
IC
D000818:Animals; D003433:Crosses, Genetic; D005260:Female; D005787:Gene Frequency / Q000235:genetics; D005838:Genotype; D006004:Glycogen Debranching Enzyme System / Q000235:genetics*; D054643:INDEL Mutation / Q000235:genetics*; D008297:Male; D008460:Meat; D011110:Polymorphism, Genetic; D019655:Quantitative Trait, Heritable; D020086:Short Interspersed Nucleotide Elements / Q000235:genetics*; D034421:Sus scrofa / Q000235:genetics* / Q000254:growth & development*
D006004:Glycogen Debranching Enzyme System