|
要 約
富山県内の一般の12農場で飼養されている種雄豚64頭，11農場の種雌豚170頭，30農場の肉豚294頭について豚ストレス症候群（PSS）の原因である骨格筋リアノジンレセプター変異遺伝子の保有状況を調査した．種豚は，農場単位では約半数，個体では8.5％がPSSヘテロ型であった．一方，肉豚は，PSSヘテロ型が11農場，PSSホモ型が1農場で検出され，個体では両遺伝子型の検出率はそれぞれ6.1％，0.7％であった．富山県畜産試験場で飼養されている大ヨークシャー種系統維持種豚60頭はすべて正常型であった．これらのことから肉豚生産においてPSSヘテロ型種豚間での交配が行われていることが推察された．
―キーワード：遺伝子診断，豚ストレス症候群，骨格筋リアノジンレセプター遺伝子．
--------------------日獣会誌 55，149〜152（2002）
Prevalence of the Ryanodine-receptor Mutant Gene in Breeding and Pork Pigs on General
Farms
Hidenari MORIOKA＊†
Toyama Prefectural Livestock Experiment Station,
1 Chisato-Maeyama, Fuchu-machi,
Nei-gun Toyama 939-2622, Japan
SUMMARY
Transmission of ryanodine-receptor mutant genes, which cause the porcine stress syndrome
(PSS), was investigated in cases of 64 breeding boars on 12 general farms, 170 breeding sows on 11 general
farms, and 294 pork pigs on 30 general farms. All farms are located in Toyama Prefecture. Per farm, nearly
50% of breeding pigs were found to have heterozygous PSS genes. The corresponding per-animal rate was
8.5%. In the case of pork pigs, heterozygous PSS genes were found in animals from 11 farms and homozygous
genes in animals from one farm. Heterozygous PSS genes were found in 6.1% of individual animals and homozygous
PSS genes in 0.7% of individual animals. All of the large-white strain of pigs raised at the Toyama Prefecture
Livestock Experiment Station were found to have normal genes. These results suggest that a cross between
heterozygous PSS carrier breeding pigs occurs during pork production.
―Key words : DNA diagnosis, porcine stress syndrome, ryanodine-receptor gene.
＊Present address : Livestock Section, Toyama Prefecture Agricultural Department, 1-7 Shinso-gawa,
Toyama 930-8501, Japan
| † Correspondence to : |
Hidenari MORIOKA (Livestock Section, Toyama Prefecture Agricultural Department)
1-7 Shinso-gawa, Toyama 930-8501, Japan
TEL 076-444-3287
FAX 076-444-4411 |
--------------------J. Jpn. Vet. Med. Assoc., 55, 149〜152 (2002) |
