Zobrazeno 1 - 10
of 75
pro vyhledávání: '"T.M. Ludwick"'
Publikováno v:
Animal Blood Groups and Biochemical Genetics. 1:247-252
Summary Polymorphisms of Holstein heifers from ten state-owned dairy herds were compared with their birth weights and four measures of body size taken at 3, 6, and 12 months of age, and three months after first calving. The eleven polymorphic systems
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::7b1414451e230ddaa13df25d491acbd0
https://doi.org/10.1111/j.1365-2052.1970.tb01168.x
https://doi.org/10.1111/j.1365-2052.1970.tb01168.x
Publikováno v:
Journal of Dairy Science. 60:254-267
Reason for removal was recorded on 8722 females removed from 12 institutional herds 1933 to 1972. Most frequent primary reasons for removal prior to 2 yr of age were disease with rate 68% for 0 to 5 mo, type 49% for 6 to 15 mo, and reproduction 66% f
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::ee76857558027702e5d48fa1d41393d2
https://doi.org/10.3168/jds.s0022-0302(77)83862-9
https://doi.org/10.3168/jds.s0022-0302(77)83862-9
Publikováno v:
Journal of Dairy Science. 62:613-620
Six inbred lines of Holstein cattle were developed and reciprocally crossed to assess the importance of heterotic effects for yield and reproductive traits. Overall both yield and reproductive performance declined with inbreeding, but effects varied
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::31ddce8a00472780cd3f3f23ea3a986f
https://doi.org/10.3168/jds.s0022-0302(79)83297-x
https://doi.org/10.3168/jds.s0022-0302(79)83297-x
Publikováno v:
Journal of Dairy Science. 51:1031-1038
Relationships between polymorphism type at nine genetic loci and first lactation production of Holstein cows were investigated. The total data included 3,107 lactations, which represented 18 years, 126 sires, and 8 herds. The analyses included adjust
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::cf5f17dbd10e355bbff70d1d757c24a6
https://doi.org/10.3168/jds.s0022-0302(68)87119-x
https://doi.org/10.3168/jds.s0022-0302(68)87119-x
Publikováno v:
Journal of Dairy Science. 35:808-812
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::0b528f4bd7e1c91a946da2cf861cb0f2
https://doi.org/10.3168/jds.s0022-0302(52)93760-0
https://doi.org/10.3168/jds.s0022-0302(52)93760-0
Publikováno v:
Journal of Dairy Science. 41:114-119
Summary To determine the repeatability of type ratings in young heifers, 544 animals in five herds were evaluated at 3, 6, and 12 mo. of age. Evaluations were made on a ten-division score-card basis, and each animal was scored independently by two ev
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::6a0f8814321e2f4900f45baa887f0fb7
https://doi.org/10.3168/jds.s0022-0302(58)90874-9
https://doi.org/10.3168/jds.s0022-0302(58)90874-9
Publikováno v:
Journal of Dairy Science. 33:633-638
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::ac9ca167555838a3a8749182d4d3b2da
https://doi.org/10.3168/jds.s0022-0302(50)91947-3
https://doi.org/10.3168/jds.s0022-0302(50)91947-3
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. 41:1278-1281
Summary Ninety-two ejaculates of bovine semen were split into two portions; one portion was processed as liquid semen, the other as frozen semen. Each portion was further split into three parts which were incubated at 37, 20, and 7° C. The semen was
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::f937b4d3f0ff63685b48939e8bfa25f5
https://doi.org/10.3168/jds.s0022-0302(58)91084-1
https://doi.org/10.3168/jds.s0022-0302(58)91084-1
Autor:
T.M. Ludwick, L.R. Boots
Publikováno v:
Journal of Dairy Science. 53:449-452
A total of 748 jugular vein plasma samples was taken from 69 Holstein cows sampled monthly throughout one lactation and the corresponding gestation period. Glutamic-oxaloacetic transaminase activity varied significantly (P
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::40c3b682b1417b14e8c3688db235f3af
https://doi.org/10.3168/jds.s0022-0302(70)86229-4
https://doi.org/10.3168/jds.s0022-0302(70)86229-4