The significance of crossbreeding in influencing growth traits, reproduction and carcass characteristics in rabbits

2017 ◽  
Vol 6 (11) ◽  
pp. 555-562
Keyword(s):  
Growth Traits ◽  
Carcass Characteristics

scholarly journals Association of Calpastatin (CAST) Gene with Growth Traits and Carcass Characteristics in Bali Cattle

2015 ◽  
Vol 38 (3) ◽  
pp. 145-149
Author(s):  
R. Putri ◽  
R. Priyanto ◽  
A. Gunawan ◽  
Jakaria Jakaria
Keyword(s):  
Growth Traits ◽  
Carcass Characteristics ◽  
Bali Cattle ◽  
Cast Gene

scholarly journals A terminal-sire index for selecting rams

2002 ◽  
Vol 82 (4) ◽  
pp. 591-593 ◽  
Author(s):  
J. J. Tosh ◽  
J. W. Wilton
Keyword(s):  
Birth Weight ◽  
Standard Deviation ◽  
Growth Traits ◽  
Carcass Characteristics ◽  
Breeding Strategies ◽  
Growth Selection ◽  
Phenotypic Standard Deviation ◽  
Component Traits ◽  
Genetic Evaluations ◽  
Terminal Sire

A terminal-sire index for selecting rams was developed. It combines genetic evaluations for growth traits and carcass characteristics measured ultrasonically on live animals into a single criterion. Weightings for component traits are averages from the indexes of four slightly different breeding goals, determined using economic values and parameters from the literature. The weightings for breeding values of component traits are -1.45 for birth weight, +1.86 for weight at 50 d of age, +2.27 for gain from 50 to 100 d, -0.51 for ultrasonic fat depth, and +1.36 for ultrasonic loin muscle depth, in phenotypic standard deviation units. Selection that is based on the index will increase growth while simultaneously decreasing fat and increasing muscle. Key words: Breeding strategies, carcass characteristics, growth, selection, sheep

FEEDLOT AND CARCASS PERFORMANCE OF YOUNG BULLS REPRESENTING SEVERAL BREEDS AND BREED CROSSES

1972 ◽  
Vol 52 (2) ◽  
pp. 241-257 ◽  
Author(s):  
H. T. FREDEEN ◽  
A. H. MARTIN ◽  
G. M. WEISS ◽  
S. B. SLEN ◽  
L. J. SUMPTION
Keyword(s):  
Growth Rate ◽  
Growth Traits ◽  
Carcass Characteristics ◽  
Longissimus Dorsi ◽  
Ether Extract ◽  
Brown Swiss ◽  
Carcass Performance ◽  
Breed Crosses ◽  
Sire Breed ◽  
Panel Evaluation

A population of 174 hybrid bulls was used to evaluate pre- and postweaning growth and carcass characteristics of crosses involving Angus, Hereford, and Holstein dams and Angus, Hereford, Brown Swiss, Charolais, and Shorthorn sires. Progeny of Holstein dams excelled (P < 0.01) for pre- and postweaning growth traits. Breed of sire differences were generally nonsignificant except for growth rate in the feedlot. Dressing percentage was not influenced by breed of dam or sire. Hide weight was least for progeny of Holstein dams and greatest for progeny of Hereford dams and sires (P < 0.01). Holstein and Brown Swiss crosses had a higher proportion of bone (P < 0.01), a greater proportion of chuck and round, and a lower proportion of rib and sirloin than crosses from the British breeds. Area of rib eye was influenced by breed of dam but not breed of sire. British breed crosses had the greatest and Holstein, Brown Swiss, and Charolais crosses the least rib fat (P < 0.01). Total deboned–defatted lean yield of the carcass was least for the British breed crosses. Breed crosses did not differ in ether extract values from the longissimus dorsi but British breed crosses showed the greatest degree of marbling. No breed of sire or breed of dam differences were detected in tenderness of the longissimus dorsi, either by Warner-Bratzler or taste-panel evaluation, but significant breed of sire–breed of dam interactions were evident for these traits. Progeny of Hereford dams were more efficient (P < 0.01) than progeny of Holstein dams in converting feed to liveweight gain. This tended to negate the Holstein-cross advantage in growth rate and lean content, and there were no breed of dam differences in energy requirements per unit of lean produced. For the breed of sire comparisons, calves from the British breeds required the greatest energy intake per unit of lean product (P < 0.05).

Preweaning growth traits for Senepol, Hereford, and reciprocal crossbred calves and feedlot performance and carcass characteristics of steers.

1998 ◽  
Vol 76 (12) ◽  
pp. 2967 ◽  
Author(s):  
C C Chase ◽  
T A Olson ◽  
A C Hammond ◽  
M A Menchaca ◽  
R L West ◽  
...  
Keyword(s):  
Growth Traits ◽  
Carcass Characteristics ◽  
Feedlot Performance

scholarly journals Blood Bio-Markers, Growth Traits, Carcass Characteristics and Income Over Feed Cost of Broiler Birds Fed Enzyme Fortified Dried Brewer’s Grain

2019 ◽  
Vol 18 (9) ◽  
pp. 834-844
Author(s):  
C.E. Oyeagu ◽  
C.L. Ugwuanyi ◽  
E. Onwujiarir ◽  
C.O. Osita ◽  
E.A. Akuru ◽  
...  
Keyword(s):  
Growth Traits ◽  
Carcass Characteristics ◽  
Feed Cost

scholarly journals Phenotypic and genetic characteristics of growth and carcass traits of Lori-Bakhtiari sheep

2007 ◽  
Vol 23 (5-6-1) ◽  
pp. 357-363
Author(s):  
M.A. Talebi ◽  
S.R. Miraei-Ashtiani ◽  
A. Nejati-Javaremi ◽  
M. Moradi-Shahrbabak
Keyword(s):  
Body Weight ◽  
Genetic Parameters ◽  
Growth Traits ◽  
Carcass Characteristics ◽  
Carcass Composition ◽  
Genetic Progress ◽  
Genetic Characteristics ◽  
Derivative Free ◽  
Maternal Heritability ◽  
Lean Weight

In this study, direct and maternal heritabilities were estimated for growth traits and carcass characteristics in Lori-Bakhtiari sheep. Data for birth weight (BW; n=5826), weaning weight (WW; n=5408), body weight at six months of age (6MW; n=4237), body weight at slaughter (SW; n=396), cold carcass weight (CCW; n=291), lean weight (LW; n=204), bone weight (WB; n=291), fat weight (WF; n=204) and fat-tail weight (FTW; n=396) were used to estimate the heritabilities. The data for first three traits had been collected during seventeen years, 1990 to 2006, while for other traits had been collected during six years, 2000 to 2006. Genetic parameters including both direct and maternal genetic effects were estimated using multivariate animal models, and a Derivative Free Restricted Maximum Likelihood (DFREML) approach. The direct heritability for BW, WW, 6MW, SW, CCW, LW, WB, WF and FTW were 0.30 ? 0.03, 0.13 ? 0.03, 0.20 ? 0.03, 0.24 ? 0.06, 0.16 ? 0.06, 0.16 ? 0.06, 0.20 ? 0.11, 0.23 ? 0.11, and 0.27 ? 0.11, respectively. Maternal heritability estimates were 0.22, 0.17, 0.06, 0.10, 0.09, 0.15, 0.26, 0.06 and 0.07 for BW, WW, 6MW, SW, CCW, LW, WB, WF and FTW, respectively. Consequently, genetic progress is possible for growth traits and carcass composition by selection.

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