Results 171 to 180 of about 7,218 (207)

Acquisition and Expression of Resistance by Bos indicus and Bos indicus x Bos taurus Calves to Amblyomma americanum Infestation

The Journal of Parasitology, 1985
Purebred and crossbred Bos indicus calves were infested 1, 2, or 3 times with 10 female and 5 male Amblyomma americanum. Resistance was acquired by both the purebred and the crossbred calves after 1 infestation and resulted in statistically significant decreases in the percentages of females that engorged, the mean weights of engorged females, and the ...
J E, George, R L, Osburn, S K, Wikel
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Pregnancy Rates to Fixed Embryo Transfer of Vitrified IVP Bos indicus, Bos taurus or Bos indicus × Bos taurus Embryos

Reproduction in Domestic Animals, 2015
ContentsThe pregnancy rates obtained after the transfer of cryopreserved in vitro‐produced (IVP) embryos are usually low and/or inconsistent. The objective of this study was to evaluate the pregnancy rates of Holstein, Gyr and Holstein × Gyr cattle after the transfer of vitrified IVP embryos produced with X‐sorted sperm.
L S R, Marinho, B V, Sanches, C O, Rosa, J H, Tannura, A G, Rigo, A C, Basso, J H F, Pontes, M M, Seneda   +7 more
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Bos taurus and Bos indicus genome sequencing

2015
The goals of the study and relevance is to explore the phylogenetic relationships and domestication history of Chinese native cattle and other foreign breeds, identify selected genes and genetic variants related to adaptation, domestication, disease-resistance, growth, and meat quality in different cattle breeds.
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Spermatogenesis in Bali cattle (Bos sondaicus) and hybrids with Bos indicus and Bos taurus

Research in Veterinary Science, 1990
Semen quality, testis size and efficiency of sperm production in Bali cattle (Bos sondaicus) and hybrids with Bos indicus and Bos taurus were determined. Mean (+/- SEM) daily sperm production per gram of testis parenchyma (DSPG) in six purebred Bali bulls was 12.2 +/- 0.7 x 10(6).
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Fertility on synchronized estrus in crossbred (Bos taurus × Bos indicus) heifers

Theriogenology, 1983
This study was performed in Western Maharastra (India). The 272 crossbred heifers were randomly allocated within herds to one of the four following groups: 1) silastic coils, 10 days treatment (n = 65); 2) Norgestomet implants, 10 days treatment (n = 71); 3) prostaglandin F(2alpha) two injections 11 days apart (n = 70); and 4) control (n = 66).
S M, Lokhande, V H, Patil, D C, Mahajan, Y P, Phadnis, P, Humblot, M, Thibier   +5 more
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Plasma progesterone concentration in Bos taurus and Bos indicus heifers

Theriogenology, 1980
Abstract Progesterone concentrations were determined by radioimmunoassay in the plasma of heifers of German Brown Swiss, Holstein-Friesian and White Fulani cattle during two consecutive estrous cycles in the dry and wet seasons in a tropical climate. Seasonal differences in the levels were not significant but peak levels were significantly higher in ...
Oyewole Adeyemo, Everett Heath
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Circumocular pigmentation and incidence of ocular squamous cell tumors in Bos taurus and Bos indicus × Bos taurus cattle

Journal of the American Veterinary Medical Association, 1990
Summary Amount of circumocular pigmentation and incidence of ocular squamous cell tumors were evaluated in dams representing diverse cattle breed types. Each dam was examined twice annually during a specific stage in the life cycle (3.5 to 9.5 years old). Overall, 28.3% of dams in the herd developed at least 1 ocular squamous cell tumor.
C M, Bailey, D R, Hanks, M A, Hanks
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Output/input differences among nonpregnant, lactating Bos indicus-Bos taurus and Bos taurus-Bos taurus F1 cross cows.

Journal of Animal Science, 1991
Nonpregnant F1 crossbred cows, progeny of either Hereford (H) or Angus (A) dams and sired by Brahman (Bm), Sahiwal (Sw), Pinzgauer (Pz), H, or A sires, were fed to maintain initial weight while rearing Charolais (C)-sired progeny for a period of 126 d in drylot commencing at about 48 d postpartum.
R D, Green, L V, Cundiff, G E, Dickerson, T G, Jenkins   +3 more
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Breed-associated resistance to tick infestation in Bos indicus and their crosses with Bos taurus

Veterinary Parasitology, 1998
The relative resistance to tick infestation of zebu (Bos indicus) in comparison to crossbred (B. indicus x B. taurus) cattle was investigated. B. indicus breeds, all belonging to Tanganyika shorthorn zebu were Meru, Mbullu and Iringa red. Crossbreds were Meru x Friesian and Iringa red x Friesian.
P N, Wambura, P S, Gwakisa, R S, Silayo, E A, Rugaimukamu   +3 more
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Identification of genes involved with tick infestation in Bos taurus and Bos indicus.

Developments in biologicals, 2008
Tick resistant cattle could provide a potentially sustainable and environmentally sound method of controlling cattle ticks. Advances in genomics and the availability of the bovine genome sequence open up opportunities to identify useful and selectable genes controlling cattle tick resistance.
Kongsuwan, K., Piper, E. K., Bagnall, N. H., Ryan, K., Moolhuijzen, P., Bellgard, M., Lew, A., Jackson, L., Jonsson, N. N.   +8 more
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