Reproduction feature, disease of sheep 양의 생식 특성 및 유전병

B17 Reproduction features, most important genetic diseases of sheep

 

Gestation, sheep + goat

• Pregnancy length: 145-150 (147) days (5 months)

• Fertilization in Fallopian tube, migration to uterus on 3-4 day.

• Implantation: centric, early (14-15th day), intrauterine migration occurs,

• Pregnancy detection: non return rate, lack of interest in/by ram or buck, the abdomen enlarges, she looks calm and walks slowly, abdominal palpation from day 90, ultrasonography (transabdominal, transrectal, 3.0-7.5 MHz transducer) – hormonal (progesterone and estron-sulphate, day 50-100)

• Pseudopregnancy in does!

• Lactation period: 100-180 days (100-300 days of goats) according to breed​

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Reproduction Traits disorders

• Puberty: 6-8 months
• Sexual activity: Breed dependent
• Seasonally polyoestrus
• Breeding season: August-November
• Jan-Feb (short period)
• Highest fertility Sept, Oct, Nov
• Biostimulation: Role of sexual pheramones is important
• Flushing -> Body condition plays important part in fertility ​

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Oestrus

• Length: Ewe – 17-18 days, biphasic (follicular & luteal phase)
• Ovulation: Spontaneous
• 1-4 eggs per ovulation
• Mating/AI: Prior to ovulation
• AI -> Laproscopic (low success rates)
• ​Twinning & multiple births are common -> Desirable trait, fecundity genes (FecB, FecX)​

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Gestation

• Pregnancy: 144-152 (147) days
• Fertilization occurs in Fallopian tube & migrates to uterus on day 3-4
• Implantation: Centric, early (15-14 days)
• Pregnancy detection: Easy
• Abdominal palpation from day 90
• Ultrasonography
• ​Lactation: 100-180 days in sheep​

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Most common reproductive disorders

• Persistent CL
• Heat & cycle disorders
• Anovulatory cycle
• Inactive ovaries
• Prolonged cycles
• Perinatal mortality of lambs​

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Important genetic disorders

• Circulation, haemostasis
• Hyperbilirubinaemia
• Glutathione-deficiency anaemia
• Haemophilia A
• Metabolic (lysosomal storage diseases)
• Ceroide lipofuschinosis
• Gangliosidosis I
• Gaucher disease
• Krabbe disease:
• Mucopolysaccharidosis
• Glucogenosis II & V
• Fat metabolism
• Yellow fat (recessive)
• Muscles
• Muscular hypertrophy (callipyge)
• Muscular dystrophy
• Bones
• Chondrodysplasia, achondroplasia
• Spider lamb syndrome, SLS (blackfaced down, Suffolk, Oxford breds)
• Intersexes
• XX males
• Skin & Hair
• Albinism
• Dermatosparaxis (skin ashthenia)
• Eptheliogenesis imperfecta

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Korean ver.(번역기 이용, 부정확 합니다.)

B17 양의 가장 중요한 유전병인 생식기능



잉태, 양 + 염소

• 임신 기간: 145-150(147)일(5개월)

• 나팔관의 수정, 3-4일의 자궁으로의 이동.

• 착상: 중심, 조기(14~15일) 자궁 내 이동,

• 임신 검출: 비반환율, 람이나 벅에 대한 관심 부족, 복부 확대, 90일차부터 복부 파열, 초음파(투과성, 전이, 3.0-7.5MHz 변환기) – 호르몬(프로제론 및 에스트론-설프레이트, 50-100일차)

• 유사 빈혈이 가능하다!

• 수유기간 : 품종별 100~180일(염소 100~300일)

생식 특성 장애

사춘기: 6~8개월
성행위: 품종별
계절성 폴리오에스트로스
번식기: 8~11월
1월-2월(단기)
최고 출산율 11월 9일
생체 자극: 성적인 페라몬의 역할은 중요하다.
플러싱 -> 신체조건은 다산에 중요한 역할을 한다.
오에스트루스

길이: Ewe – 17-18일, biphasic(민속 및 후천)
배란: 자발적
배란당 1~4개의 달걀
짝짓기/AI: 배란 전
AI -> 라프로스코프(성공률이 낮음)
트윈닝&다출산이 일반적임 -> 바람직한 특성, 다산성 유전자(FecB, FecX)
잉태

임신: 144-152 (147)일
수정은 나팔관에서 발생하며 3-4일 날 자궁으로 이동한다.
삽입: 중심, 초기(15-14일)
임신 감지: 쉬운
90일차부터 복부 팔뚝 박음
초음파 검사
수유: 양에서 100-180일
가장 흔한 생식 장애

영구 CL
열 & 사이클 장애
애노보레이션 사이클
비활성 난소
장기 사이클
양들의 치사율
중요한 유전적 장애

순환, 지혈
고빌리루비나혈증
글루타티온 결핍증
혈우병 A
대사(리소자 저장 질환)
세로이드 지질근종증
갱년기증 1세
가우처병
크라베 병:
점코폴리스다당증
글루코겐화 II&V
지방대사
황색지방(반복)
근육들
근육비대증(칼리피지)
근위축증
뼈들
콘드로디스플라스시아, 무콘드로플라스시아
스파이더 양 증후군, SLS (검은 얼굴 아래, 서퍽, 옥스포드)
인터섹스
XX남성
스킨 & 헤어
알비니즘
피부병(피부 재질)
에프텔리오제네시스 불완전성