Visceral organ weights of swine selected for reduced backfat thickness and increased growth rate

1993 ◽  
Vol 73 (1) ◽  
pp. 201-206 ◽  
Author(s):  
R. L. Cliplef ◽  
R. M. McKay
Keyword(s):  
Growth Rate ◽  
Key Words ◽  
Backfat Thickness ◽  
Visceral Organ ◽  
Organ Weights ◽  
Liver And Kidney ◽  
Seven Generations

Eight generations of Yorkshire swine and seven generations of Hampshire swine, involving a total of 2300 animals of which 1350 were selected for reduced backfat thickness and increased growth rate, had concurrent increases in visceral organ weights (heart, lungs, spleen, liver and kidney). Implications are that this could amount to 0.4 kg less weight per carcass. Key words: Pigs, organs, selection, Yorkshire, Hampshire

Carcass quality characteristics of swine selected for reduced backfat thickness and increased growth rate

1993 ◽  
Vol 73 (3) ◽  
pp. 483-494 ◽  
Author(s):  
R. L. Cliplef ◽  
R. M. McKay
Keyword(s):  
Growth Rate ◽  
Key Words ◽  
Subcutaneous Fat ◽  
Quality Characteristics ◽  
Backfat Thickness ◽  
Carcass Quality ◽  
Growth Selection ◽  
Selection For ◽  
Seven Generations

Selection for reduced backfat thickness and increased growth rate in Yorkshire (eight generations) and Hampshire (seven generations) swine resulted not only in less backfat but carcasses which were longer with higher percentages of dissectible lean in the fresh hams. Selected carcasses also had a higher incidence of more severe loin lean-fat separation and subjectively perceived softness in the subcutaneous fat. Boar carcasses were longer and leaner with smaller loin eye areas compared with gilt carcasses. Key words: Swine, carcass quality, backfat, growth, selection

Effect of index selection for reduced backfat thickness and increased growth rate on sow weight changes through two parities in swine

1992 ◽  
Vol 72 (2) ◽  
pp. 403-408 ◽  
Author(s):  
R. M. McKay
Keyword(s):  
Growth Rate ◽  
Key Words ◽  
Selection Pressure ◽  
Backfat Thickness ◽  
Index Selection ◽  
Weight Changes ◽  
Selection For ◽  
The Impact

The impact of continued selection for reduced backfat thickness and improved growth rate on weight changes in Yorkshire and Hampshire sows, from breeding as gilts to weaning their second litter, was studied. Results suggest that some sow weight changes may have been influenced by selection pressure exerted. Key words: Sows, Canadian Yorkshire, Hampshire, liveweight change

Preweaning losses of piglets as a result of index selection for reduced backfat thickness and increased growth rate

1993 ◽  
Vol 73 (2) ◽  
pp. 437-442 ◽  
Author(s):  
R. M. McKay
Keyword(s):  
Growth Rate ◽  
Key Words ◽  
Selection Index ◽  
Backfat Thickness ◽  
Index Selection ◽  
Selection For ◽  
Preweaning Period

Index selection for reduced backfat thickness and increased postweaning growth rate resulted in increased preweaning death losses due either directly or indirectly to the sow in the Yorkshire and Hampshire breeds. This resulted in a reduced percentage of piglets weaned in the Yorkshire breed. Key words: Swine, selection index, preweaning period, mortality, survival

scholarly journals EFFECTS OF CASTRATION ON GROWTH RATE, BODY AND VISCERAL ORGAN WEIGHTS OF PIGS.

2021 ◽  
Vol 13 ◽  
pp. 121-125
Author(s):  
C. Okere ◽  
M. U. Iloje
Keyword(s):  
Growth Rate ◽  
Weight Gain ◽  
Average Daily Gain ◽  
Daily Weight Gain ◽  
Visceral Organ ◽  
Average Daily Weight Gain ◽  
Large White ◽  
Organ Weights ◽  
Visceral Organs ◽  
Body Weights

Effects of castration on growth rate, body and visceral organ weights of pigs were investi­gated using data from intact males, intact females of Large White pigs full or half cast­rated at 2, 4, or 6 weeks of age. Body weights and feed intake were recorded to the nearest 0.1kg at weekly intervals from birth, while weights of abdominal and thoracic organs were taken at slaughter. Results show that age at castration signi­ficantly affected weaning weights and weights at 2 months of age (P < 0.05), but did not affect the weights of visceral organs and the average daily weight gain (P> 0.05). Castration significantly affected weaning weights (P <0.05) average daily gain (P <0.01), body weights at 4 months (P <0.05), but not the weights of the visceral organs (P> 0.05) Intact females and, intact males significant­ly differed in body weights at 4 months and in average daily weight gain (P 0.05). Com­parisons between full castrates and intact males showed significant differences in all the measured parameters except the weights of visceral organs. Full castrates and intact females did not differ, significantly (P > 0.05) in any of the traits measured.

RESPONSES TO INDEX SELECTION FOR REDUCED BACKFAT THICKNESS AND INCREASED GROWTH RATE IN SWINE

1990 ◽  
Vol 70 (3) ◽  
pp. 973-977 ◽  
Author(s):  
R. M. McKAY
Keyword(s):  
Growth Rate ◽  
Key Words ◽  
Average Daily Gain ◽  
Selection Response ◽  
Backfat Thickness ◽  
Index Selection ◽  
Selection Differential ◽  
Differential Selection ◽  
Selection For ◽  
Daily Gain

Selection resulted in a decrease in probed backfat thickness and a negligible change in postweaning average daily gain. Realized heritabilities in the Yorkshire and Hampshire select lines were 0.41 ± 0.04 and 0.34 ± 0.18, respectively, for probed backfat thickness and 0.38 ± 0.43 and 0.65 ± 0.19, respectively, for postweaning average daily gain. Key words: Swine, selection differential, selection response, backfat, growth rate

Effects of Dietary Fiber and Protein Concentration on Growth, Feed Efficiency, Visceral Organ Weights and Large Intestine Microbial Populations of Swine

1989 ◽  
Vol 119 (6) ◽  
pp. 879-886 ◽  
Author(s):  
Friday O. I. Anugwa ◽  
Vincent H. Varel ◽  
James S. Dickson ◽  
Wilson G. Pond ◽  
Lennart P. Krook
Keyword(s):  
Dietary Fiber ◽  
Large Intestine ◽  
Feed Efficiency ◽  
Protein Concentration ◽  
Microbial Populations ◽  
Visceral Organ ◽  
Organ Weights

scholarly journals A Canonical Correlation Analysis of Relationships Between Growth, Compositional Traits and Longevity, Lifetime Productivity and Efficiency in Polish Landrace Sows

2014 ◽  
Vol 14 (2) ◽  
pp. 257-270 ◽  
Author(s):  
Magdalena Sobczyńska ◽  
Tadeusz Blicharski ◽  
Mirosław Tyra
Keyword(s):  
Growth Rate ◽  
Correlation Analysis ◽  
Canonical Correlation Analysis ◽  
Canonical Correlation ◽  
Performance Test ◽  
Selection Index ◽  
Phenotypic Selection ◽  
Backfat Thickness ◽  
Canonical Variate ◽  
Weaned Piglets

Abstract Relationships between performance test traits (growth rate, backfat thickness, loin depth, lean meat percentage, exterior, phenotypic selection index) and longevity traits (length of productive life, number of litters, total number of weaned pigs, number of weaned piglets per year, number of litters per year) in Landrace sows were evaluated using canonical correlation analysis. The data set consisted of 23,012 purebred sows that farrowed from 1994 to 2011 in 161 herds. The first three canonical correlations (0.37, 0.25, 0.07) were highly significant (P<0.0001). Correlations of the first canonical variate with the original measured variables indicated that sows with high values for this variate had lower growth rate (r=-0.31) and loin depth (r=-0.43), greater backfat thickness (r=0.23), as well as being older at birth of their last litter (r=0.98). These sows also had a greater number of litters (r=0.94) and better lifetime efficiency (r=0.61 and r=0.70 for number of weaned piglets per year and number of litters per year, respectively). Canonical loadings for the second canonical function indicate that sows with high values for the second set of variates had high growth rate (r=0.79) and phenotypic selection index (r=0.83), excellent conformation (r=0.62), as well as better efficiency in pig production (r=0.67). The squared multiple correlations show that the first canonical variate of the performance traits is a poor predictor of longevity (0.13) and nearly useless for predicting efficiency traits (0.07). Performance test traits explain 11% of the variance in the variables of longevity and lifetime productivity, whereas dependent variables explain only 3% of the variance in performance test traits. The relationships between performance test data and subsequent lifetime productivity or longevity were significant and unfavourable but low for Polish Landrace population

scholarly journals Vegetative growth of Umbrella Leaf Palm, Johannesteijsmannia lanceolata in Angsi Forest Reserve, Malaysia

1970 ◽  
Vol 12 ◽  
pp. 11-20
Author(s):  
M. Z. Rozainah ◽  
U. R. Sinniah
Keyword(s):  
Growth Rate ◽  
Key Words ◽  
Vegetative Growth ◽  
Forest Reserve ◽  
Vegetative Phenology

A study of an acaulescent palm, Johannesteijsmannia  lanceolata J. Dransfield was carried out in Angsi Forest Reserve Negeri Sembilan Malaysia for a period of 19 months A total of 32 adults, 24 juveniles and 32 seedlings from 3 different plots were censused every two weeks. The results showed that the average numbers of new leaves entering the crown with in the study period (19months) were: 3.3, 2.6 and 1.3 for 2.1, 1.6 and 0.8 leaves per year for adult juvenile and seedling, respectively. From the calculation it was discovered that the time spent by each leaf in the crown before it died was 8.8 years for adult and 8.4 years for juvenile. Key words: Johannesteijsmannia; Growth rate; Vegetative phenology; Arecaceae doi: 10.3126/eco.v12i0.3190 Ecoprint: An International Journal of Ecology 12: 11-20, 2005

Progeny test of ram lambs selected for low ultrasonic backfat thickness or high post-weaning growth rate

1993 ◽  
Vol 33 (1-2) ◽  
pp. 105-118 ◽  
Author(s):  
P.F. Fennessy ◽  
G.J. Greer ◽  
W.E. Bain ◽  
P.D. Johnstone
Keyword(s):  
Growth Rate ◽  
Backfat Thickness ◽  
Progeny Test ◽  
Ram Lambs
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