Results 231 to 240 of about 32,248 (275)
Some of the next articles are maybe not open access.
Pedigree analysis in the Brazilian Zebu breeds
Journal of Animal Breeding and Genetics, 2009SummaryZebu breeds play an important role in cattle production systems in Brazil. To assess the genetic variability from animals in the Herd Books of Nelore, Gir and Guzerat breeds, generation intervals, inbreeding, effective population size and parameters of gene origin (effective number of founders, ancestors and founder genomes) were calculated ...
F J C, Faria +3 more
openaire +2 more sources
Œstrus in Zebu Cattle in Uganda
Nature, 1955DURING investigations into the possibility of artificial insemination of indigenous Zebu and Nganda cattle with homologous semen obtained by electrical stimulation, the œstrous cycles of an experimental group of heifers have been determined, using marked vasectomized bulls.
openaire +2 more sources
Studies on the habits of zebu cattle. III. Water consumption of Zebu cattle
The Journal of Agricultural Science, 1955In continuation of a series of studies on the habits of Zebu cattle, records for the quantities of water consumed every hour by ten cattle during twenty periods of 24 hr. observations have been analysed.A large variation in day-to-day consumption was evident, but water was taken on an average during 8 hr.
D. H. L. Rollinson +2 more
openaire +1 more source
Animal Science, 1976
SUMMARYComponents of reproductive efficiency of Zebu-type and Charolais × Zebu-type (1/2, 3/4 and 7/8) females were compared. Zebus had longer mean intervals from calving to first service (57·8 days) and from calving to conception (46·0 days). Least squares means for both traits were respectively 129·8 and 145·1 days.
F. E. Madalena, null A. Hinojosa C.
openaire +1 more source
SUMMARYComponents of reproductive efficiency of Zebu-type and Charolais × Zebu-type (1/2, 3/4 and 7/8) females were compared. Zebus had longer mean intervals from calving to first service (57·8 days) and from calving to conception (46·0 days). Least squares means for both traits were respectively 129·8 and 145·1 days.
F. E. Madalena, null A. Hinojosa C.
openaire +1 more source
Puberty in South American Bos indicus (Zebu) cattle
Animal Reproduction Science, 2004Puberty in Zebu heifers follows a pattern characterized by a decrease in the steroid feedback mechanism and an increase in LH concentration, which result in the first ovulation followed by a short estrous cycle and the onset of normal cycles thereafter. These events are similar to those observed in Bos taurus cattle but occur at a later age.
G P Nogueira
exaly +4 more sources
Efective Crossbreeding Systems Utilizing Zebu Cattle
Journal of Animal Science, 1980The basic objectives and procedures for successful crossbreeding of beef cattle were considered, with special reference to the levels of realized hybrid vigor that might be anticipated for different crossbreeding programs involving the American Brahman (Z1) and European (Ej) breeds. Intralocus heterozygosis levels with respect to breed origin of genes (
openaire +2 more sources
Journal of Animal Science, 1980
Day of birth in a calendar year (DB), gestation length (GL), birth weight (BW) and survival rate of calves (SR) were recorded for 4 years for single-sire matings of (1) Angus (A) and Brahman (B) sires to A, B, Brangus (BR) and Africander-Angus (AF) dams; (2) BR sires to BR dams, and (3) AF sires to AF dams, a total of four straightbred and six ...
W L, Reynolds +3 more
openaire +2 more sources
Day of birth in a calendar year (DB), gestation length (GL), birth weight (BW) and survival rate of calves (SR) were recorded for 4 years for single-sire matings of (1) Angus (A) and Brahman (B) sires to A, B, Brangus (BR) and Africander-Angus (AF) dams; (2) BR sires to BR dams, and (3) AF sires to AF dams, a total of four straightbred and six ...
W L, Reynolds +3 more
openaire +2 more sources
Biochemical Genetics, 1981
Serum guanase levels of Indian Zebu (Hariana) cattle and its crosses with different exotic levels of temperate breeds of dairy cattle were estimated in 527 animals, and their associations with economic characters were determined. The overall mean value of serum guanase level was 13.46 +/- 0.45 IU/ml of serum.
S, Rishi +5 more
openaire +2 more sources
Serum guanase levels of Indian Zebu (Hariana) cattle and its crosses with different exotic levels of temperate breeds of dairy cattle were estimated in 527 animals, and their associations with economic characters were determined. The overall mean value of serum guanase level was 13.46 +/- 0.45 IU/ml of serum.
S, Rishi +5 more
openaire +2 more sources
Genetic and Biological Aspects of Zebu Adaptability
Journal of Animal Science, 1980The utility and documentation of traits and characteristics of Zebu, Bos indicus, cattle in beef production in the United States are discussed with reference to adaptation. Zebu cattle are uniquely suited to hot climates due to coat, hide, skin and hematological attributes.
openaire +2 more sources