کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
5544187 1554341 2017 10 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Genetic evaluation is possible on community pastoral small ruminant flocks in the presence of multiple sires and uncertain of paternity
ترجمه فارسی عنوان
ارزیابی ژنتیکی در گاوهای کوچک احیا کوچک در حضور چند زایمان و عدم اطمینان از پدر و مادر
کلمات کلیدی
موضوعات مرتبط
علوم زیستی و بیوفناوری علوم کشاورزی و بیولوژیک علوم دامی و جانورشناسی
چکیده انگلیسی
Many sheep flocks in the world are raised collectively, in a communal way, where animals of different owners graze together. These conditions make it difficult or impossible to identify the paternity of the offspring, since several sires and dams can mate without any control. This practice inhibits the achievement of accurate genetic evaluations using the animal model procedures. Therefore, it is proposed here to evaluate the efficiency of the use of two methods, the hierarchical animal model (HM) and the average numerator relationship matrix (ANRM), in the estimation of genetic parameters and breeding values ​​of sheep, with uncertainty of paternity in which there are mating in the presence of multiple sires. The methods were compared in two situations, one with a simulated trait with a phenotypic variance of 7.5 kg2, an average of 14.5 kg and a heritability of 0.30, so that the true genetic parameters were known, and the other with real data, with weights at birth and weaning of animals of a flock of Santa Inês sheep breed. The results confirmed that genetic evaluation models with multiple sires, which consider paternity uncertainty, are efficient in estimating genetic parameters and ranking superior sires in sheep flocks with community pastoral characteristics. Despite the best fit of the data by HM, both models were similar for the estimates and can be considered in the genetic evaluations.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Small Ruminant Research - Volume 151, June 2017, Pages 72-81
نویسندگان
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