Pituitary gonadotrophins in Booroola and control Merino sheep
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چکیده
منابع مشابه
Oestradiol Implant Reduces Litter Size in the Booroola Merino
The litter size of homozygous Booroola Merino ewes results in high perinatal mortality. One subcutaneous implant of crystaline oestradiol in silastic tubing in heterozygous Booroola Merino ewes decreased ovulation rate from 3.18 -r0.15 (n = 39) to 2.03 & 0.14 (n = 35), and decreased litter size (5 8 weeks pregnant) from 2.49 + 0.13 (n = 39) to 1.47 + 0.12 (n = 32), providing a useful management...
متن کاملstudy of bmp 15 gene in afshari and afshari × booroola merino cross sheep
introduction one of the most important sources of the red meat in iran is the meat produced from sheep. increasing lamb per ewe considered as a strategy for improving the efficiency for sheep production, although reproduction traits have low heritability. several genes associated with reproduction were investigated in the recent years. the bmp 15 gene and its paralog gdf 9 and receptor, bmpr-ib...
متن کاملLifetime Reproductive Performance of Booroola Merino X Romney Ewes of Differing Genotype for the Booroola Fecundity Gene and Romney Ewes
First cross Booroola Merino x Romney (B x R) ewes born in 1975, 1976, 1978 and 1979 were classified as being heterozygous (F+) or non carriers (++) for the Booroola fecundity gene. Their performance as hoggets (< 1 year of age) I and to six years of age (1975 and 1976 bornonly) was compared with contemporary Romney (R) ewes. As hoggets, the F+ ewes had ovulation rates about 0.5 higher than ++ B...
متن کاملNeuronal Ceroid Lipofuscinosis in Australian Merino Sheep
The neuronal ceroid lipofuscinoses (NCLs) are a group of inherited neurodegenerative diseases characterised by the accumulation of autofluorescent lipopigment in a variety of tissues. At least six different forms of NCL occur in humans and the disease has been identified in various animal species, including sheep. Clinical features of NCL are dementia, loss of vision, motor disturbances, and pr...
متن کاملBreeding for resistance of Merino sheep, Australia
John Karlsson is a researcher and farmer who has been working on a variety of sheep selection and resistance to parasites for more than 30 years. He is a Senior Veterinary Officer at the Department of Agriculture and Food Western Australia (DAFWA). At DAFWA he has worked on regulatory disease management programmes and providing general advice to livestock farmers since 1978. Al Karlsson is a Zo...
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ژورنال
عنوان ژورنال: Reproduction
سال: 1984
ISSN: 1470-1626,1741-7899
DOI: 10.1530/jrf.0.0710189