Relationships between growth parameters and scrotal circumference in young beef bulls

1984 ◽  
Vol 22 (6) ◽  
pp. 667-674 ◽  
Author(s):  
M. Makarechian ◽  
A. Farid ◽  
R.T. Berg
Keyword(s):  
Growth Parameters ◽  
Scrotal Circumference ◽  
Beef Bulls

SCROTAL CIRCUMFERENCE, SEMEN CHARACTERISTICS, GROWTH PARAMETERS AND THEIR RELATIONSHIPS IN YOUNG BEEF BULLS

1985 ◽  
Vol 65 (4) ◽  
pp. 789-798 ◽  
Author(s):  
M. MAKARECHIAN ◽  
A. FARID ◽  
R. T. BERG
Keyword(s):  
Semen Quality ◽  
Growth Parameters ◽  
Scrotal Circumference ◽  
Three Samples ◽  
Semen Volume ◽  
Semen Characteristics ◽  
The Mean ◽  
Beef Bulls ◽  
The Relationship ◽  
Daily Gain

The records of sixty-six yearling and 2-yr-old beef bulls selected for breeding in 1980 and 1981 were used to study the relationships between body weight (BW) and gain measurements, scrotal circumference (SC) and semen characteristics in young beef bulls. The bulls belonged to four breed groups; Hereford, Beef Synthetic, Dairy Synthetic and Pee Wee. A week before the start of breeding season, the bulls were weighed and measured for scrotal circumference. A single prebreeding semen sample was collected by electro-ejaculator from each bull in 1980, while three samples (pre-, mid- and postbreeding) were collected by artificial vagina in 1981. The mean SC ranged from 31.3 cm in the Pee Wee to 38.6 cm in the Beef Synthetic, while SC per 100 kg BW was maximum in the Pee Wee (8.36%) and minimum in the Dairy Synthetic group (6.28%, P < 0.05). The relationship between BW and SC was linear within yearling and 2-yr-old bulls. Age did not have any effect on SC over and above BW within each age group. Preweaning daily gain accounted for a higher fraction of variation in SC compared to BW in all the breed groups except Dairy Synthetic. The relationships between BW, SC and feedlot daily gain with semen quality and quantity were positive but generally small (r < 0.30, P > 0.11). Semen volume and sperm motility had lower values and percent secondary abnormalities were higher in prebreeding compared with mid- or postbreeding samples. Repeatability estimates of the semen characteristics were generally low, ranging from 0 to 0.49. Key words: Beef bulls, scrotal circumference, semen characteristics, growth rate

Genetic and phenotypic parameter estimates for scrotal circumference and semen traits in young beef bulls

1987 ◽  
Vol 28 (5) ◽  
pp. 547-555 ◽  
Author(s):  
T.A. Gipson ◽  
D.W. Vogt ◽  
M.R. Ellersieck ◽  
J.W. Massey
Keyword(s):  
Parameter Estimates ◽  
Scrotal Circumference ◽  
Phenotypic Parameter ◽  
Beef Bulls

Genetic parameters for testosterone response to GnRH stimulation and scrotal circumference in tropical beef bulls

1991 ◽  
Vol 29 (4) ◽  
pp. 297-309 ◽  
Author(s):  
M.J. Mackinnon ◽  
N.J. Corbet ◽  
K. Meyer ◽  
H.M. Burrow ◽  
R.P. Bryan ◽  
...  
Keyword(s):  
Genetic Parameters ◽  
Scrotal Circumference ◽  
Beef Bulls

RELATIONSHIPS OF SCROTAL CIRCUMFERENCE WITH BODY WEIGHT AND BACKFAT THICKNESS IN MULTIBREED SYNTHETIC POPULATIONS OF YOUNG BEEF BULLS

1982 ◽  
Vol 62 (4) ◽  
pp. 1049-1055 ◽  
Author(s):  
A. K. SHARMA ◽  
R. T. BERG
Keyword(s):  
Body Weight ◽  
Performance Test ◽  
Correlation Coefficients ◽  
Backfat Thickness ◽  
Simple Correlation ◽  
Scrotal Circumference ◽  
Synthetic Populations ◽  
Breed Group ◽  
Partial Correlations ◽  
Beef Bulls

Relationships of scrotal circumference (SC) with body weight (BW) and backfat thickness (FT) as measured from scanograms were studied. A total of 935 observations on growing multibreed synthetic beef bulls on a postweaning performance test were available from a commercial herd for this study. Significant breed group, period and group × period interaction effects were noted on SC, BW and FT. BW and SC increased significantly during the test in all breed groups, while FT showed no change in three breed groups. Repeatability pooled across groups for SC was estimated as 0.72; 0.66 after adjusting for BW. Significant correlations were noticed between SC and BW within each breed group. Partial correlations between SC and BW at constant FT were not different from gross correlations. Linear regression coefficients of SC on BW were significant in all groups and showed heterogeneity among groups but not between periods within groups. Adjustments of SC for BW should, therefore, be breed group specific. BW alone accounted for considerable variation in SC, from 38 to 76%. Simple correlation coefficients between SC and FT were low and significant in only two groups. A significant but low positive relationship was noted between SC and FT at constant BW in a group fed a high-concentrate diet during the postweaning gain period, but there was no relationship in four other groups. Results indicated that the method of adjusting SC for FT as an indirect way of adjusting for scrotal fat was not satisfactory. Key words: Bulls, scrotal circumference, growth

Scrotal circumference of Australian beef bulls

2014 ◽  
Vol 81 (6) ◽  
pp. 805-812 ◽  
Author(s):  
Geoffry Fordyce ◽  
Michael R. McGowan ◽  
Allan Lisle ◽  
Tracy Muller ◽  
Jack Allen ◽  
...  
Keyword(s):  
Scrotal Circumference ◽  
Beef Bulls

Comparison of methods for predicting yearling scrotal circumference and correlations of scrotal circumference to growth traits in beef bulls

1991 ◽  
Vol 69 (7) ◽  
pp. 2711-2720 ◽  
Author(s):  
S. L. Pratt ◽  
J. C. Spitzer ◽  
H. W. Webster ◽  
H. D. Hupp ◽  
W. C. Bridges
Keyword(s):  
Growth Traits ◽  
Comparison Of Methods ◽  
Scrotal Circumference ◽  
Beef Bulls

scholarly journals Evaluation and prediction of scrotal circumference in beef bulls

2019 ◽  
Vol 140 ◽  
pp. 25-32 ◽  
Author(s):  
Silvio R.O. Menegassi ◽  
Gabriel R. Pereira ◽  
Concepta McManus ◽  
Vanerlei M. Roso ◽  
Carolina Bremm ◽  
...  
Keyword(s):  
Scrotal Circumference ◽  
Beef Bulls

Scrotal circumference measurements in 764 beef bulls

1976 ◽  
Vol 6 (5) ◽  
pp. 485-494 ◽  
Author(s):  
R.G. Elmore ◽  
C.J. Bierschwal ◽  
R.S. Youngquist
Keyword(s):  
Scrotal Circumference ◽  
Beef Bulls

Influence of performance testing on reproductive performance of beef bulls

1992 ◽  
Vol 72 (1) ◽  
pp. 23-30
Author(s):  
J. W. Wilton ◽  
M. R. McMorris
Keyword(s):  
Reproductive Performance ◽  
Performance Test ◽  
Performance Testing ◽  
Test Program ◽  
Improvement Program ◽  
Scrotal Circumference ◽  
Subsequent Fertility ◽  
Beef Bulls ◽  
Calving Season

The fertility of beef bulls which completed performance test in the Ontario Bull Test Program was measured by classification of success as breeders according to surveys of consignors to test, by classification of satisfaction in surveys of users of tested bulls and by measurement of calf crop percentages and birth dates of progeny relative to herdmates in the Ontario Beef Herd Improvement Program. Consignors classified 3.0% of the 2556 bulls with completed information as unsuccessful breeders. Users rated 61.5% of the 411 bulls with information from the participant survey as very satisfactory and 4.5% as very unsatisfactory. The effects of end of test weight, gain index, backfat and scrotal circumference on calf crop percentage (cows calving relative to cows exposed), percent of calves born in the first 3 wk of the calving season, percent of calves born in the first 12 wk and satisfaction score were generally small and nonsignificant as tested within breed for 122 Angus, 451 Charolais, 632 Hereford, 575 Limousin and 501 Simmental bulls. In general, gain on test and end-of-test measurements were not found to have any association with subsequent fertility of bulls tested. There was no evidence that increased scrotal circumferences were associated with increased measures of productive performance nor that increased fatness, within the range included in the Ontario Bull Test Program, decreased reproductive performance. Key words: Fertility, genetic evaluation, scrotal circumference, backfat

Sign in / Sign up

Export Citation Format

Share Document