Zobrazeno 1 - 10
of 161
pro vyhledávání: '"J.I. Weller"'
Publikováno v:
Animal, Vol 10, Iss 8, Pp 1254-1262 (2016)
A total of 1922 first generation crossbred cows born between 2005 and 2012 produced by inseminating purebred Israeli Holstein cows with Norwegian Red semen, and 7487 purebred Israeli Holstein cows of the same age in the same 50 herds were analyzed fo
Externí odkaz:
https://doaj.org/article/d32d816887844d4687e6d81b0ca8d0dc
Publikováno v:
Animal, Vol 8, Iss 2, Pp 208-216 (2014)
Several studies have shown that computation of genomic estimated breeding values (GEBV) with accuracies significantly greater than parent average (PA) estimated breeding values (EBVs) requires genotyping of at least several thousand progeny-tested bu
Externí odkaz:
https://doaj.org/article/18b1961663a441d0a6826984b789cb23
Publikováno v:
Animal, Vol 8, Iss 4, Pp 511-519 (2014)
An a posteriori granddaughter design was applied to estimate quantitative trait loci genotypes of sires with many sons in the US Holstein population. The results of this analysis can be used to determine concordance between specific polymorphisms and
Externí odkaz:
https://doaj.org/article/c66e146729fe4f0086d163b9372a3c0a
Publikováno v:
Animal, Vol 6, Iss 2, Pp 193-202 (2012)
An efficient algorithm for genomic selection of moderately sized populations based on single nucleotide polymorphism chip technology is described. A total of 995 Israeli Holstein bulls with genetic evaluations based on daughter records were genotyped
Externí odkaz:
https://doaj.org/article/e6e285a2d0c745e59ae442e9cc16315f
Autor:
E. Baruch, J.I. Weller
Publikováno v:
Animal, Vol 3, Iss 1, Pp 16-23 (2009)
The method of Israel and Weller (Estimation of candidate gene effects in dairy cattle populations. Journal of Dairy Science 1998, 81, 1653–1662) to estimate quantitative trait locus (QTL) effects when only a small fraction of the population was gen
Externí odkaz:
https://doaj.org/article/3c1830dbec46499f94e165c884abddd6
Autor:
J.I. Weller, E. Ezra
Publikováno v:
Animal, Vol 2, Iss 12, Pp 1717-1723 (2008)
Weight of male and female Israeli Holstein calves and yearling gain were analyzed on 285 800 records from 105 935 animals from 458 herds recorded between 1994 and 2007. The difference between the sexes increased until around 400 days, at which point
Externí odkaz:
https://doaj.org/article/0dc445461a104e7aa4c0b64a21355f98
Akademický článek
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Akademický článek
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Autor:
J.I. Weller, E. Ezra
Publikováno v:
Journal of Dairy Science. 99:427-442
Five alternative models were applied for analysis of dystocia and stillbirth in first and second parities. Models 1 and 2 were included only to estimate the parameters required for model 4, and models 3 and 5 are included only as comparisons to the m
Autor:
E. Ezra, J.I. Weller
Publikováno v:
Journal of Dairy Science. 98:676-684
The objectives were to investigate the effects of various environmental factors that may affect herd-life of Israeli Holsteins, including first-calving age and season, calving ease, number of progeny born, and service sire for first calving in comple