Zobrazeno 1 - 10
of 17
pro vyhledávání: '"L.K. Jairath"'
Publikováno v:
Journal of Dairy Science. 84:256-265
This study tested for differences between genetic merits of sons and daughters of sires and for evidence of segregating quantitative trait loci on the X chromosomes of North American Holsteins. Son PTA adjusted for sire PTA was used as the dependent
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::9643a4021cdb809c3a55b3658b5feb72
https://doi.org/10.3168/jds.s0022-0302(01)74475-x
https://doi.org/10.3168/jds.s0022-0302(01)74475-x
Publikováno v:
Canadian Journal of Animal Science. 79:425-431
Production and feed intake data on 36 115 first lactation Holstein cows obtained from Quebec Dairy Herd Analysis Service were combined with conformation data from the Holstein Association of Canada to estimate genetic correlations among production, e
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::64d03cfab1c289eee380c2e9f2c0ba97
https://doi.org/10.4141/a99-008
https://doi.org/10.4141/a99-008
Publikováno v:
Journal of Dairy Science. 81:550-562
Methods were developed for the national genetic evaluation of herd life for Canadian Holstein sires. The genetic evaluations incorporate information from survival (direct herd life) and information from conformation traits that are related to herd li
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::6cc6d925419d652feb8e353ba39c0793
https://doi.org/10.3168/jds.s0022-0302(98)75607-3
https://doi.org/10.3168/jds.s0022-0302(98)75607-3
Publikováno v:
Journal of Dairy Science. 78:438-448
Data on 82,835 Holstein cows, daughters of 703 sires and with first calvings from 1979 to 1984 in 2384 herds enrolled in Quebec Dairy Herd Analysis Service, were analyzed for relationships of first lactation traits with traits for partial and total l
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::d214ebfbece0cd290fc1f64267107c52
https://doi.org/10.3168/jds.s0022-0302(95)76653-x
https://doi.org/10.3168/jds.s0022-0302(95)76653-x
Publikováno v:
Journal of Animal Breeding and Genetics. 110:135-139
Summary Heritabilities, genetic and phenotypic correlations among lifetime yields of milk, fat and protein, herdlife, productive life and number of lactations initiated in the herd were estimated from records of 44,933 progeny of 427 young and 119 pr
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::a6afc48535521025b4616c8a1916d556
https://doi.org/10.1111/j.1439-0388.1993.tb00724.x
https://doi.org/10.1111/j.1439-0388.1993.tb00724.x
Publikováno v:
Journal of Dairy Science. 75:2272-2282
Genetic and phenotypic correlations were estimated between 6 lifetime production and 28 linearized type traits using REML. The data set contained 34,322 cows, each with a record for all 34 traits. The analyses accounted for the fixed effects of herd,
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::bf8e03981b3c39a74f524fb3e628c913
https://doi.org/10.3168/jds.s0022-0302(92)77988-0
https://doi.org/10.3168/jds.s0022-0302(92)77988-0
Publikováno v:
Journal of dairy science. 82(5)
Several approaches for analysis of survival in the first three lactations were compared using data from approximately 700,000 Canadian Holsteins. Two approaches (linear model and threshold model) were used to analyze a binary measure of survival. Oth
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::74c0dd77d4c3af6871544ebd19eb5578
https://pubmed.ncbi.nlm.nih.gov/10342243
https://pubmed.ncbi.nlm.nih.gov/10342243
Publikováno v:
Journal of dairy science. 80(11)
Effects of the interaction between type and production on two measures of functional herd life were examined for Canadian Holsteins. Data were records of survival through first lactation for 1,153,706 cows and number of lactations initiated (maximum
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::9f977f2e964c9eb61aea07e0714cbaec
https://pubmed.ncbi.nlm.nih.gov/9406092
https://pubmed.ncbi.nlm.nih.gov/9406092
Publikováno v:
Journal of dairy science. 77(3)
Linear and nonlinear relationships between functional herd life and conformation traits were investigated by regression of functional herd life of 63,602 Quebec Holstein cows on the estimated transmitting abilities of their sires for conformation tra
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::0fc20c21dac130c6a0c646bd6598d534
https://pubmed.ncbi.nlm.nih.gov/8169292
https://pubmed.ncbi.nlm.nih.gov/8169292
Publikováno v:
Journal of dairy science. 77(1)
Data on 82,835 Holstein cows, daughters of 703 sires and with first calving from September 1979 to December 1984 from 2384 herds enrolled in the Quebec Dairy Herd Analysis Service, were used to estimate genetic and phenotypic parameters of partial an
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::5fb117892e96a37149f6e362af984d80
https://pubmed.ncbi.nlm.nih.gov/8120199
https://pubmed.ncbi.nlm.nih.gov/8120199