Zobrazeno 1 - 10
of 23
pro vyhledávání: '"D.O. Richardson"'
Publikováno v:
Journal of Dairy Science. 77:3132-3136
Deaths and disposals of Jerseys from birth to 120 d of first lactation during a selection experiment were summarized. Cows were randomly assigned to the high milk yield and young sire lines. Service sires were bulls with the highest estimated breedin
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::d4d3ee20e9379514bc7c1fca85041d4e
https://doi.org/10.3168/jds.s0022-0302(94)77256-8
https://doi.org/10.3168/jds.s0022-0302(94)77256-8
Publikováno v:
Journal of Dairy Science. 75:1154-1160
Reproductive traits of heifers and primiparous cows from a long-term selection project were analyzed to determine correlated response to single-trait selection for milk yield. Data were from 1056 daughters (765 selection, 291 control) of 37 bulls (17
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::35c638b3793e045b15d646f96b6dba72
https://doi.org/10.3168/jds.s0022-0302(92)77861-8
https://doi.org/10.3168/jds.s0022-0302(92)77861-8
Publikováno v:
Journal of Dairy Science. 73:2547-2554
Health data were analyzed for 567 Jersey cows resulting from direct selection for milk yield and 193 cows in a control line. Controls were daughters of bulls selected randomly from commercial AI sampling programs in 1967. Health costs were expenses d
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::bf99a10e81fb1904e1cb02c38ef2a289
https://doi.org/10.3168/jds.s0022-0302(90)78940-0
https://doi.org/10.3168/jds.s0022-0302(90)78940-0
Correlated response in growth and body measurements accompanying selection for milk yield in Jerseys
Publikováno v:
Journal of dairy science. 75(1)
Growth and body measurements from a long-term selection project were analyzed to determine correlated responses to single-trait selection for milk yield. Data were from 1056 daughters (765 selection, 291 control) of 37 bulls (17 selection, 20 control
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::f2eeeca93f66d80ffbd7496366327b4d
https://pubmed.ncbi.nlm.nih.gov/1541738
https://pubmed.ncbi.nlm.nih.gov/1541738
Autor:
J.R. Owen, H.H. Dowlen, E.D. Moore, B.R. Bell, R.R. Bonczek, W.K. Langholff, D.O. Richardson, R.H. Miller
Publikováno v:
Journal of dairy science. 74(9)
In 1967, the Jersey herd at the Dairy Experiment Station, Lewisburg, TN was divided into two groups on the basis of ancestry, type, and breeding value for milk as part of a project to determine effects of single trait selection for high milk yield on
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::8addbc32feb322b9c812bf24a8403423
https://pubmed.ncbi.nlm.nih.gov/1779070
https://pubmed.ncbi.nlm.nih.gov/1779070
Publikováno v:
Journal of Dairy Science. 71:3446-3452
Daughters of bulls selected for PD milk (selection line) were compared to random bred controls at the University of Tennessee-USDA Dairy Experiment Station. Jersey classification data were divided: 1) 166 selection and 82 control cows scored under th
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::3e7411a30fdbfee7aca7667b95b61f62
https://doi.org/10.3168/jds.s0022-0302(88)79950-6
https://doi.org/10.3168/jds.s0022-0302(88)79950-6
Publikováno v:
Theriogenology. 19:811-815
A study involving 357 Jersey cows at the Dairy Experiment Station was conducted to determine the effects of post-partum intrauterine treatment of two formulations on several reproductive parameters. In phase I, animals were treated with a bolus conta
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::27ee451a7dbd24fa2518b84424e6ed1e
https://doi.org/10.1016/0093-691x(93)90324-x
https://doi.org/10.1016/0093-691x(93)90324-x
Publikováno v:
Journal of Dairy Science. 69:2370-2378
Gross feed efficiency (milk energy output divided by energy consumed) was measured in 232 Jersey cows resulting from direct selection for milk yield and a control line of 121 daughters of 20 Jersey bulls taken randomly from commercial artificial inse
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::4626bb126d5b991575d3137e29838a9a
https://doi.org/10.3168/jds.s0022-0302(86)80676-2
https://doi.org/10.3168/jds.s0022-0302(86)80676-2
Publikováno v:
Journal of Dairy Science. 53:1779-1782
Influences of additive and heterosis effects upon body weight estimated from forechest girth and several other body measurements of linebred and linecross Holstein heifers were investigated. The numbers of heifers measured at various ages ranged from
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::aa6ecdceb02724df3ce5640c13c71ef5
https://doi.org/10.3168/jds.s0022-0302(70)86478-5
https://doi.org/10.3168/jds.s0022-0302(70)86478-5
Publikováno v:
Journal of Dairy Science. 54:1518-1525
Lactation records of 228 first lactation Jerseys were utilized to assess the importance of sire×ration interactions. Daughters of 13 sires were divided randomly into two groups at calving and assigned to either an all forage ration or a forage plus
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::d6d893a8355ee82393e77deb0b600cd8
https://doi.org/10.3168/jds.s0022-0302(71)86057-5
https://doi.org/10.3168/jds.s0022-0302(71)86057-5