Phenotypic aspects of lamb survival in Australian Merino sheep1
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چکیده
منابع مشابه
Phenotypic aspects of lamb survival in Australian Merino sheep.
Lamb survival in Australian Merino sheep was investigated using survival records from 14,142 lambs born between 1975 and 1983. This data set included roll calls of live lambs at birth, 7 d, marking (30 d), and weaning (110 d), which allowed 4 binomial traits (alive or dead) to be recorded for each lamb at each time interval. The average survival to weaning was 72.4% with 23% of singles, 32% of ...
متن کاملLamb survival in Australian Merino sheep: a genetic analysis.
Direct and maternal components of variance for lamb survival to birth, 7 d, and weaning (110 d) were estimated by REML procedures in a flock of Australian Merino sheep. A total of 14,142 lambs, the progeny of 421 sires and 3,666 dams, born between 1975 and 1983 were available for analysis. The study has produced some of the most precise estimates of genetic parameters for lamb survival in the A...
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Domestication and selection are processes that conserve the pattern of genetic diversities between and within populations. Identification of genomic regions that are targets of selection for phenotypic traits is one of the main aims of research in animal genetics. An approach for identifying divergently selected regions of the genome is to compare FST values among loci to estimate the genetic v...
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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 کاملEffects of ewe live weight and age on reproductive performance, lamb growth, and survival in Central Anatolian Merino sheep
The aim of this study was to evaluate the effects of premating ewe weight and age on ewe reproductive performance, lamb growth and survival in Central Anatolian Merino (CAM) sheep. The trial included 4935 ewes and 5548 lambs from 23 breeder flocks in Eskişehir Province. The live weights (LWs) and ages of the ewes were recorded 1 week before the mating season. The number of lambs born, fertility...
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ژورنال
عنوان ژورنال: Journal of Animal Science
سال: 2009
ISSN: 0021-8812,1525-3163
DOI: 10.2527/jas.2008-1547