Genetic and phenotypic correlations among production and reproduction traits in Africano sheep
نویسندگان
چکیده
منابع مشابه
Genetic correlations between reproduction and production traits in swine.
Genetic correlations between reproduction and production traits were estimated in swine. Reproduction traits investigated were age at first service (AFS), number of live-born piglets in the first litter (NBA1), interval from weaning to first service after first litter (WTS1), number of live-born piglets in the second litter (NBA2), and interval from weaning to first service after the second lit...
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The difficulties and costs of measuring individual feed intake in dairy cattle are the primary factors limiting the genetic study of feed intake and utilisation, and hence the potential of their subsequent industry-wide applications. However, indirect selection based on heritable, easily measurable, and genetically correlated traits, such as conformation traits, may be an alternative approach t...
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15 صفحه اولIncorporating Subjectively Assessed Sheep and Wool Traits into Genetic Evaluations for Merino Sheep 2: Phenotypic and Genetic Correlations
Using pedigree and performance records obtained from two Merino breeders the phenotypic and genetic relationship between subjectively assessed sheep and wool traits and objectively measured wool traits were estimated. The subjective traits were all favourably genetically correlated with fibre diameter. The genetic relationship with body weight, greasy fleece weight and fibre diameter variation ...
متن کاملAssociation of Melatonin Receptor 1A Gene Polymorphisms with Production and Reproduction Traits in Zandi Sheep
Melatonin regulates some major physiological processes such as maturation and function of reproductive system, pubertal development, seasonal reproduction and adaptation. The activation of melatonin hormone is mediated by melatonin receptor. Previous studies showed melatonin receptor 1A gene (MTNR1A) is highly polymorphic in seasonally breeding species. The aim of the present study was detectio...
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ژورنال
عنوان ژورنال: South African Journal of Animal Science
سال: 2009
ISSN: 2221-4062,0375-1589
DOI: 10.4314/sajas.v28i2.44256