2019
DOI: 10.1017/s1751731119000144
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Abstract: Black and White dual-purpose cattle (DSN) are kept in diverse production systems, but the same set of genetic parameters is used for official national genetic evaluations, neglecting the herd or production system characteristics. The aim of the present study was to infer genetic (co)variance components within and across defined herd descriptor groups or clusters, considering only herds keeping the local and endangered DSN breed. The study considered 3659 DSN and 2324 Holstein Friesian (HF) cows from parities o… Show more

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Cited by 3 publications
(3 citation statements)
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“…k-means clustering only handles numeric values, but PAM also works with ordinarily scaled variables (Maione et al, 2019). PAM is more robust to outliers than k-means clustering, because it minimizes the sum of nonsquared dissimilarities instead of the sum of squared Euclidean distances (Kaufman and Rousseeuw, 1990;Struyf et al, 1996). PAM searches for k medoids (the representative elements) within the data set (Kaufman and Rousseeuw, 1990) and minimizes the total dissimilarity of each element to its nearest medoid.…”
Section: Herd Clustering Approachesmentioning
confidence: 99%
See 1 more Smart Citation
“…k-means clustering only handles numeric values, but PAM also works with ordinarily scaled variables (Maione et al, 2019). PAM is more robust to outliers than k-means clustering, because it minimizes the sum of nonsquared dissimilarities instead of the sum of squared Euclidean distances (Kaufman and Rousseeuw, 1990;Struyf et al, 1996). PAM searches for k medoids (the representative elements) within the data set (Kaufman and Rousseeuw, 1990) and minimizes the total dissimilarity of each element to its nearest medoid.…”
Section: Herd Clustering Approachesmentioning
confidence: 99%
“…DSN and Holstein Friesian (HF) cattle are considered simultaneously in genetic evaluations, but their genetic connectedness is quite low, implying biased estimated breeding values (EBVs) when ignoring further genetic model improvements. In such context, Jaeger et al (2019) suggested improved genetic evaluations for DSN through a widened population size, i.e., considering DSN cows from the Netherlands and from Poland.…”
Section: Introductionmentioning
confidence: 99%
“…A decreasing population size is a major cause for losses in genetic diversity (Kantanen et al, 1999). In such context, Jaeger et al (2018b) calculated an increase of inbreeding per year in DSN of 0.1 %, implying a rather small effective population size of 85 animals.…”
Section: Genetic Diversity Parametersmentioning
confidence: 99%