scholarly journals Short Communication: Correlations of Marker-Assisted Breeding Values with Progeny-Test Breeding Values for Eight Hundred Ninety-Nine French Holstein Bulls

2008 ◽  
Vol 91 (6) ◽  
pp. 2520-2522 ◽  
Author(s):  
F. Guillaume ◽  
S. Fritz ◽  
D. Boichard ◽  
T. Druet
Keyword(s):  
Short Communication ◽  
Progeny Test ◽  
Marker Assisted Breeding ◽  
Breeding Values ◽  
Holstein Bulls

A comparison between the actual progeny test of Friesian/Holstein bulls and indexes calculated from pedigree information

1989 ◽  
Vol 48 (1) ◽  
pp. 37-41 ◽  
Author(s):  
G. J. T. Swanson ◽  
H. Joanne Bellamy
Keyword(s):  
Milk Fat ◽  
Protein Yield ◽  
Progeny Test ◽  
Pedigree Information ◽  
Progeny Testing ◽  
Holstein Bulls ◽  
Fat Yield ◽  
Milk Marketing ◽  
Maternal Grandsire ◽  
Progeny Performance

ABSTRACTTwo pedigree indexes were calculated for 754 Friesian/Holstein bulls born between 1974 and 1980 and tested by the Milk Marketing Board. Correlations between the indexes and the average progeny performance were used to compare the indexes calculated using information from different ancestors. The first index, or estimated predicted difference (EPD) was calculated as one-half the sire progeny test, known as an Improved Contemporary Comparison (ICC), plus one-quarter the maternal grandsire ICC. The second index or estimated ICC (EICC) was calculated from one-half the sire ICC plus one-half the dam cow genetic index (CGI). The correlations between the deregressed bull evaluations (DICC) and EPD, calculated from 310 bulls, were 0·40 for milk yield, 0·40 for fat yield and 0·39 for protein yield. The corresponding correlations between the DICC and EICC, calculated from 314 bulls, were 0·43, 0·40 and 0·41. The regression coefficients for predicting average progeny performance from the EPD index were 1·00 (s.e. 0·13), 0·97 (s.e. 0·12), 0·96 (s.e. 0·13), 1·09 (s.e. 0·12) and 1·08 (s.e. 0·10) for milk, fat and protein yield, fat and protein percentage respectively. Those for predicting progeny performance from the EICC index were 0·95 (s.e. 0·11), 0·81 (s.e. 0·10) and 0·84 (s.e. 0·10) for milk, fat and protein yield respectively. Although the correlations were lower than the expected values of 0·50 (EPD) and 0·55 (EICC) the regressions were near the expected value of 1. The results indicate that the indexes are useful as a preliminary means of selecting bulls prior to progeny testing.

An evaluation of Jamaica Hope bulls

1970 ◽  
Vol 74 (3) ◽  
pp. 473-476 ◽  
Author(s):  
P. Mahadevan ◽  
K. E. Wellington ◽  
K. L. Roache
Keyword(s):  
National Level ◽  
Comparison Method ◽  
Progeny Test ◽  
Breeding Values

SUMMARYThe contemporary comparison method of evaluating the progeny test of sires has been employed in estimating the breeding values of bulls used in the development of the Jamaica Hope breed. The need to test a larger number of bulls by combining the programme at the national level is stressed.

Short Communication: Associations of BoLA alleles DRB3.2*16 and DRB3.2*23 with health-related traits in Holstein bulls

2011 ◽  
Vol 91 (4) ◽  
pp. 597-600
Author(s):  
B. S. Sharma ◽  
C. P. Verschoor ◽  
N. A. Karrow
Keyword(s):  
Short Communication ◽  
Favorable Effect ◽  
Chain Reaction ◽  
Leukocyte Antigen ◽  
Health Related ◽  
Holstein Bulls ◽  
Favorable Influence ◽  
Polymerase Chain ◽  
Fertility Traits ◽  
Better Than

Sharma, B. S., Verschoor, C. P. and Karrow, N. A. 2011. Short communication:Associations of BoLA alleles DRB3.2*16 and DRB3.2*23 with health-related traits in Holstein bulls. Can. J. Anim. Sci. 91: 597–600. The relationships between bovine leukocyte antigen (BoLA) DRB3.2 alleles and health and fertility traits were investigated. A group of 548 Canadian and American Holstein bulls was genotyped for the presence of DRB3.2*16 and DRB3.2*23 alleles using the multi-primer target polymerase chain reaction technique. The traits of interest included somatic cell score (SCS), lactation persistency, daughter fertility (DF), and herd life (HL). Higher frequencies were observed for alleles DRB3.2*16 and DRB3.2*23 in this bull population compared with previous reports. In a comparison-wise level, some significant contrasts were detected; however, no association was detected between the DRB3.2 alleles and SCS. Allele DRB3.2*16 had a favorable effect on HL compared with allele DRB3.2*23. On the other hand, these two alleles had a favorable influence on DF, additionally, individuals carrying both of these two alleles performed better than the individuals carrying either allele. Further investigation is warranted to examine the effects of these alleles on HL and reproduction performance.

scholarly journals Interrelationships between breed, growth hormone genotype, plasma IGF-I level and meat Performance in bulls of different ages (short communication)

2000 ◽  
Vol 43 (6) ◽  
pp. 591-596
Author(s):  
A. V. Sirotkin ◽  
P. Chrenek ◽  
A. V. Makarevich ◽  
J. Huba ◽  
J. Bulla
Keyword(s):  
Body Mass ◽  
Gel Electrophoresis ◽  
Short Communication ◽  
Agarose Gel ◽  
Lower Body ◽  
Agarose Gel Electrophoresis ◽  
Igf I ◽  
Age Dependent ◽  
Holstein Bulls ◽  
Daily Gain

Abstract. The aim of our studies was to determine, whether difference in GH alleles affect growth Performance in cows and whether these effects may be mediated by IGF-I. The presence of L (leucine-rich) and V (valine-rich) alleles of GH, plasma IGF-I level and changes in body mass were analyzed in 84 bulls of Simmental (meat) and Holstein (milk) breeds at 90 d and 180 d of age using PCR, agarose gel electrophoresis and IRMA The agedependent increase in body mass, daily gain and plasma IGF-I concentration was observed in Simmental bulls. In Holstein bulls the age-dependent rise in plasma IGF-I was also found, whilst Holstein bulls had significantly lover IGF-I level, than Simmental bulls. The proportion of LL, VV and LV genotypes of GH in the randomly selected herd of Simmental bulls was 0.25:0.20:0.55. Animals of VV genotype had lower body mass, daily gain and plasma IGF-I level, than bulls of LL and LV genotypes, whilst no differences in these indexes between LL and LV genotypes were found. The observed association of growth rate, GH genotype and IGF-I level, suggest that GH genotype may affect meat Performance via IGF-I secretion.

scholarly journals Diacylglycerol acyltransferase (DGAT) activity in relation to muscle fat content and <i>DGAT1</i> genotype in two different breeds of <i>Bos Taurus</i> (short communication)

2006 ◽  
Vol 49 (4) ◽  
pp. 351-356 ◽  
Author(s):  
B. Sorensen ◽  
C. Kühn ◽  
F. Teuscher ◽  
F. Schneider ◽  
R. Weselake ◽  
...  
Keyword(s):  
Positive Relationship ◽  
Short Communication ◽  
Bos Taurus ◽  
Diacylglycerol Acyltransferase ◽  
Fat Content ◽  
Longissimus Dorsi ◽  
Dgat Activity ◽  
Marbling Score ◽  
Holstein Bulls ◽  
The Relationship

Abstract. To circumvent the obvious waste of resources when producing good marbled beef, research is needed to clarify mechanisms which are involved in intramuscular fat storage in cattle. The possible association between the activity of diacylglycerol acyltransferase (DGAT) and muscle fat content was examined in samples of longissimus dorsi (LD) and semitendinosus (ST) muscle from Holstein and Charolais bulls. The Holstein bulls exhibited higher fat content in both muscles and higher marbling score. In Holstein, DGAT activity was enhanced in the LD muscle, and there was a tentative positive relationship between DGAT activity and the fat content in ST muscle. When muscle DGAT activity was examined as a function of DGAT1 genotype for all animals, regardless of breed, the DGAT activity of LD muscle of the K/K genotype was about five-fold greater than for either the K/A or A/A genotypes. Further investigation on the relationship between DGAT1 genotype and i.m. fat is required before this may be developed as a selection tool for marbling.

scholarly journals Studies on changes of estimated breeding values of U.S. Holstein bulls for final score from the first to second crop of daughters

2010 ◽  
Vol 52 (1) ◽  
pp. 81-88
Author(s):  
V. K. R. Koduru ◽  
S. Tsuruta ◽  
M. Łukaszewicz ◽  
I. Misztal ◽  
T. J. Lawlor
Keyword(s):  
Breeding Values ◽  
Final Score ◽  
Holstein Bulls ◽  
Estimated Breeding Values

Polymorphism at locus of STAT5A and its association with breeding values of milk production traits in Iranian Holstein bulls

2009 ◽  
Vol 123 (1) ◽  
pp. 97-100 ◽  
Author(s):  
M. Sadeghi ◽  
M. Moradi Shahrbabak ◽  
G. Rahimi Mianji ◽  
A. Nejati Javaremi
Keyword(s):  
Milk Production ◽  
Production Traits ◽  
Milk Production Traits ◽  
Breeding Values ◽  
Holstein Bulls
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