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2. Main reproduction features, reproduction traits and most important genetic diseases of cattle
Terms in this set (23)
Uniparous, low reproductive potential, long puberty, long gestation
Name some general reproductive features
Contionous breeding, frequent embryonic losses, low twinning rate (up to 5%)
The cow is continous polyoestrus, what does that mean?
How long is the ovarian cycle?
How long is the heat duration?
Mucous discharge, hyperaemic, swollen genitalia, standing heat by teasing, mounting of other females
Name some oestrus signs
280 -290 days
How long is the gestation pregnancy of a cow?
Fallopian tube, migrates to uterus on day 4-5
Where does fertilization happen and how long does it take?
Spontaneously, 10-14 hours after finishing clinical heat
When does ovulation happen?
Not more than two
How many ovulated eggs are there each time?
15 days post-partum and is often silent
When does first heat after calving occur?
~300 days a year
How long is the lactating period?
How long is dry period?
Dairy and meat production
What reproduction traits are there?
What is a pre-requisite of dairy production?
Bovine placental lactogene, a glycoprotein hormone with lactogenic properties
Which gene plays a big role in mammogenesis and milk production?
Increase nr of offspring and the gentic pool of dam
Reproduction traits: What are the maternal effects?
Prolificacy genes, they increase granulosa cell function, steroid biosynthesis for muscles, multiple ovulations for dairy
Which genes play a major importance?
Anovulatory cycle which gives longer/shortened cycles, delayed ovulation, cystic ovaries
Name a frequent cycle amd ovulatory disorder
Bovine Lymphocyte Adhesion Deficiency
Genetic diseases: What does BLAD stand for?
Severe ulcers on oral mucous membranes, loss of teeth, recurrent or chronic diarrhea, death at early age
What happens to cattle affected with BLAD
Defieciency of Uridine Monophosphate Synthase, a lysosomal storage disease
What does DUMPS stand for and what is it?
Embryonic death in early stage of pregnancy
What does DUMPS lead to?
Kidney dysplasia, nephritis
What is Atresia/ Agenesia?
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