205 Dietary Strategies to Limit Average Daily Gain of Late Finishing Pigs

2021 ◽  
Vol 99 (Supplement_1) ◽  
pp. 64-64
Author(s):  
Devin Goehring ◽  
Katherine A McCormick ◽  
Julie Mahoney ◽  
Rodney Hinson
Keyword(s):  
Mixed Model ◽  
Linear Mixed Model ◽  
Block Design ◽  
Average Daily Gain ◽  
Finishing Pigs ◽  
Compensatory Gain ◽  
And Gender ◽  
Dietary Treatments ◽  
Dietary Strategies ◽  
Daily Gain

Abstract A total of 2,164 pigs [DNA610 x DNA241; initially 100.7 ± 2.14 kg body weight (BW)] were used in a 54.1 ± 3.85-day study to determine dietary strategies to limit average daily gain (ADG) in late finishing pigs raised in a commercial environment. Mixed-sex pens (20.0 ± 0.85 pigs/pen) balanced by initial BW and gender ratio were randomly assigned to 1 of 4 dietary treatments fed ad libitum with 27 replications each: (1) Nutritionally replete corn soybean-meal control (CTRL), (2) Treatment 1 with 21% reduced lysine and other amino acids (AAR), (3) Corn/vitamin/mineral diet (CVM), and (4) Treatment 3 fed for 21 days then switched to CTRL. Data were analyzed as a randomized complete block design using a linear mixed model. Relative to CTRL, feeding AAR or CVM for 21 days reduced ADG (P < 0.001), average daily feed intake (ADFI; P = 0.005), and gain-to-feed (G:F, P < 0.001). Over 55-days, AAR and CVM diets reduced (P < 0.001) cumulative ADG, ADFI, G:F, and final BW compared to CTRL. Transitioning to CTRL diet from CVM diet after 21-days increased ADG (P < 0.001) and improved G:F (P < 0.001) from day 21 to marketing compared to 55-day CTRL, AAR, and CVM; nevertheless, the compensatory CTRL period was insufficient for the 21-day CVM fed pigs to fully compensate resulting in reduced cumulative BW, ADG (P < 0.001) and poorer G:F (P < 0.001) than the 55-day CTRL. All holding strategies decreased (P < 0.001) carcass yield, hot carcass weight (HCW), and loin depth compared to CTRL. Utilizing a CVM diet for 21 or 55 days increased (P < 0.001) backfat compared to CTRL or AAR. In summary, utilizing lysine deficient or corn/vitamin/mineral diets can limit ADG along with poorer G:F. Transitioning to a non-holding diet after feeding a corn/vitamin/mineral diet for 21-days resulted in compensatory gain, but reductions in growth performance and carcass traits remained evident.

scholarly journals 73 Effects of dietary neutral detergent fiber and standardized ileal digestible lysine levels on growth performance and carcass characteristics of growing-finishing pigs

2020 ◽  
Vol 98 (Supplement_3) ◽  
pp. 57-58
Author(s):  
Uislei Orlando ◽  
Ning Lu ◽  
Carine Vier ◽  
Wayne Cast ◽  
Xun Zhou ◽  
...  
Keyword(s):  
Growth Performance ◽  
Block Design ◽  
Average Daily Gain ◽  
Neutral Detergent Fiber ◽  
Feed Ratio ◽  
Experimental Unit ◽  
Finishing Pigs ◽  
Dietary Treatments ◽  
Daily Gain ◽  
Standardized Ileal Digestible Lysine

Abstract Our objective was to determine the effects of feeding different neutral detergent fiber (NDF) and standardized ileal digestible (SID) lysine (Lys) levels on performance of growing-finishing pigs from 30- to 130-kg. A total of 2,016 barrows and gilts (PIC 280×Camborough, initial BW of 29.6±0.53 kg) were allotted to a randomized complete block design with a 2×2 factorial arrangement. Dietary treatments (Table 1) consisted with two NDF levels (13% or 20%) and two SID Lys curves (PIC2008 or PIC2016). There were 21 mixed-sex pigs per pen, and 24 pens per treatment. The experiment diets were fed in 3 phases. Wheat, wheat by-products, peas, and canola oil were used with NRC (2012) loading values to achieve treatments, and all diets were formulated to be iso-caloric (2,420 kcal NE/kg). Experimental data were analyzed using generalized linear mixed models with pen as the experimental unit. Increasing NDF level resulted in a reduction (P< 0.05) in average daily gain (ADG), average daily feed intake, hot carcass weight, carcass yield, carcass ADG, and backfat depth (Table 2), and tended to decrease percentage of removals and mortality (P=0.10). Pigs fed PIC2016 Lys curve had greater ADG and carcass ADG as compared to those fed PIC2008 Lys curve (P< 0.05). There were NDF×Lys interactions (P< 0.10) for ADG, gain to feed ratio (G:F), carcass ADG, and carcass G:F. These response criteria were improved for pigs fed PIC2016 Lys curve compared to those fed PIC2008 Lys curve when NDF level was 13%; while no evidence of differences was observed at 20% NDF. Results indicate that increasing NDF level from 13 to 20% deteriorate performance of 30- to 130- kg pigs; and the improved growth performance of pigs fed PIC2016 Lys curve as compared to those fed PIC2008 Lys curve was only observed when lower NDF level was presented.

142 Evaluation of Proso Millet as a Partial or Complete Replacement for Corn in Growing-finishing Diets for Pigs

2021 ◽  
Vol 99 (Supplement_1) ◽  
pp. 71-72
Author(s):  
Khang A Nguyen ◽  
Melanie D Trenhaile-Grannemann ◽  
Thomas Burkey ◽  
Phillip Miller
Keyword(s):  
Growth Performance ◽  
Soybean Meal ◽  
Block Design ◽  
Average Daily Gain ◽  
Experimental Unit ◽  
Finishing Pigs ◽  
Complete Replacement ◽  
Proso Millet ◽  
Dietary Treatments ◽  
Daily Gain

Abstract An experiment was conducted to evaluate the effects of increasing the inclusion of proso millet on the growth performance of growing and finishing pigs. Using a randomized complete block design, 36 crossbred barrows, with an average initial weight of 22.2 kg, were randomly assigned to 1 of 4 dietary treatments (9 pens/treatment; 1 pig/pen). Diet 1 was corn-soybean meal-based (control) and Diets 2, 3, and 4 had proso millet replacing 33%, 67%, and 100%, respectively, of corn in the control diet. The diets were formulated according to 4 growth phases (P1, 25 to 50 kg BW; P2, 50 to 75 kg BW; P3, 75 to 100 kg BW; and P4, 100 to 135 kg BW) with nutrient contents formulated according to NRC (2012) recommendations. Data were analyzed using the GLIMMIX procedure of SAS, using pig as the experimental unit. In P1 and P2, no differences in average daily gain (ADG) or average daily feed intake (ADFI) were observed among treatments (P > 0.3). In P3, pigs consuming the proso millet diets had greater ADFI than pigs consuming the basal diet, especially pigs fed Diet 4 compared to pigs fed Diet 1 (3.66 vs. 3.29 kg; P < 0.01). The ADG:ADFI ratio was not affected (P > 0.1) by treatments during this period. In P4, although there was a difference in ADFI between pigs fed Diet 3 and Diet 1 (3.8 vs. 3.47 kg; P = 0.04), no decreases in ADG:ADFI ratio were observed among the four dietary treatments (P > 0.5). Average daily gain was not affected (P > 0.3) by treatments during the growing-finishing period, suggesting that the level of corn replacement up to 100% by proso millet did not affect pig growth. In conclusion, proso millet was shown to effectively replace corn in corn-soybean meal-based diet for growing-finishing pigs without compromising growth performance.

172 Effects of Dietary Valine, Isoleucine, and Tryptophan Supplementations to Diets Containing Excess Leucine from Corn Protein on Growth Performance of Growing Pigs

2021 ◽  
Vol 99 (Supplement_1) ◽  
pp. 61-62
Author(s):  
Woongbi Bi Kwon ◽  
Jose A Soto ◽  
Hans H Stein
Keyword(s):  
Block Design ◽  
Control Diet ◽  
Average Daily Gain ◽  
Growing Pigs ◽  
Experimental Unit ◽  
Negative Effects ◽  
Final Body Weight ◽  
Corn Protein ◽  
Dietary Treatments ◽  
Daily Gain

Abstract An experiment was conducted to test the hypothesis that addition of Val, Ile, or Trp alone or in combination will reduce the negative effects of excess Leu in diets for growing pigs. A total of 288 growing pigs (28.6 ± 2.5 kg) were randomly assigned to 1 of 9 dietary treatments in a randomized complete block design. There were 2 barrows and 2 gilts in each pen and 8 replicate pens per treatment. A control diet based on corn and soybean meal and 8 diets based on corn and a high-protein corn product (48% crude protein) with 2 levels of crystalline L-Val (0 or 0.10%), L-Ile (0 or 0.10%), and L-Trp (0 or 0.05%) were formulated. The crystalline L-Val, L-Ile, and L-Trp increased standardized ileal digestible (SID) Val:Lys from 70 to 80%, SID Ile:Lys from 53 to 63%, and SID Trp:Lys from 18 to 23%, respectively. All diets were formulated to contain 1.00% SID Lys and the 8 diets containing corn protein contained 171% SID Leu:Lys. Individual pig weights were recorded at the beginning and at the conclusion of the 28-d experiment. Data were analyzed using the PROC MIXED of SAS with a pen as the experimental unit. Diet was the fixed effect and block and replicate within block were random effects. Results indicated that final body weight and average daily gain were not different between pigs fed the control diet and pigs fed the diet with Val and Trp addition, but greater (P < 0.001) than for pigs fed the diet with Val addition, Ile addition, Trp addition, Val and Ile addition, Ile and Trp addition, or Val, Ile, and Trp addition (Table 1). In conclusion, addition of Val and Trp to diets with excess Leu may prevent negative effects of excess Leu in diets for growing pigs.

scholarly journals PSII-20 Evaluation of Different Vitamin Concentrations in a Commercial Wean-to-Finish Program

2020 ◽  
Vol 98 (Supplement_3) ◽  
pp. 170-171
Author(s):  
Robyn Thompson ◽  
Brandon Knopf ◽  
Carine Vier ◽  
Ning Lu ◽  
Wayne Cast ◽  
...  
Keyword(s):  
Vitamin E ◽  
Growth Performance ◽  
Feed Intake ◽  
Block Design ◽  
Average Daily Gain ◽  
Serum Vitamin ◽  
Experimental Unit ◽  
Final Body Weight ◽  
Dietary Treatments ◽  
Daily Gain

Abstract Our objective was to evaluate the effects of different vitamin concentrations on growth performance of wean-to-finish pigs under commercial conditions. A total of 900 barrows and gilts (PIC337×Camborough; initially 5.34±0.13 kg) were used in a 136-d growth trial with 25 pigs per pen and 12 pens per treatment in a randomized complete block design. Experimental diets were fed in 3 phases during nursery (5-6, 6-13, and 13-26 kg) and 5 phases during grow-finish (26-44, 44-65, 65-87, 87-108, and 108-128 kg). Dietary treatments consisted of: 1) NRC: vitamin concentrations following NRC (2012) recommendations; 2) PIC: vitamin concentrations following PIC (2016) recommendations; 3) Low-PIC: vitamin concentrations that ranged from 0 to 91% of PIC recommendations. Data were analyzed using the GLIMMIX procedure of SAS with pen as the experimental unit. During the nursery period, pigs fed PIC and Low-PIC diets had greater (P< 0.05) average daily feed intake (ADFI) compared to pigs fed NRC diets. There was no evidence (P >0.10) for differences in average daily gain (ADG) and feed efficiency (G:F). During the grow-finish period, there was no evidence (P >0.10) for differences in growth performance. During the overall wean-to-finish period, pigs fed PIC diets had lower (P< 0.05) ADG and final body weight compared to pigs fed NRC and Low-PIC diets. There was no evidence (P >0.10) for differences in ADFI or G:F. Pigs fed PIC diets had the greatest serum vitamin D3 at the end of nursery and finish periods (P< 0.05) and the greatest serum Vitamin E at the end of nursery period (P< 0.05). In summary, pigs fed PIC and Low-PIC diets had greater nursery feed intake and serum vitamin E and D3 concentrations compared to pigs fed NRC diets. Data from this study have demonstrated that pigs fed diets with reduced vitamin concentrations compared to PIC (2016) recommendations had improved wean-to-finish growth rate.

scholarly journals Evaluation of microencapsulated organic acids and botanicals on growth performance of nursery and growing-finishing pigs

2021 ◽  
Author(s):  
Wade M Hutchens ◽  
Mike D Tokach ◽  
Jason C Woodworth ◽  
Joel M DeRouchey ◽  
Robert D Goodband ◽  
...  
Keyword(s):  
Organic Acids ◽  
Growth Performance ◽  
Block Design ◽  
Control Diet ◽  
Average Daily Gain ◽  
Experimental Period ◽  
Finishing Pigs ◽  
Day Nursery ◽  
Treatment Structure ◽  
Daily Gain

Abstract A total of 1,215 pigs (L337 × 1050, PIC, Hendersonville, TN) were used to determine the effect of microencapsulated organic acids and botanicals (MOB; AviPlus; Vetagro, Inc. Chicago, IL), on growth performance from weaning to market. Pigs were weaned at approximately 21 d of age and placed in pens based on initial body weight (BW) with 27 pigs per pen in a randomized complete block design. During the 42-day nursery period, pigs were allotted to 1 of 2 treatments in an unbalanced treatment structure with 15 pens (replications) fed the control diet and 30 pens (replications) fed diets containing 0.30% MOB from d 0 to 21 and 0.10% from d 21 to 42. On d 42, pigs were transported as intact pens from the nursery to the finishing facility. During the finishing period, 3 treatments were applied which included: 1) pigs on the control diet in nursery remained on control diets; 2) 50% of pigs provided MOB in nursery were then fed 0.05% MOB throughout finishing, and 3) 50% of pigs provided MOB in nursery were then fed the control diet throughout finishing. All pens of pigs on treatments 2 and 3 were allotted based on ending nursery BW to the finishing treatment. There were 15 replications per treatment in the finishing period. From d 0 to 21, pigs fed diets with MOB had a tendency for increased (P < 0.058) gain:feed (G:F) when compared to pigs fed the control diet; however, there was no evidence of difference (P > 0.05) for average daily gain (ADG), average daily feed intake (ADFI), or d 21 BW. From d 21 to 42, there was no evidence of difference (P > 0.05) for ADG, ADFI, or G:F. For the overall nursery period (d 0 to 42), pigs fed diets with MOB had increased (P < 0.05) G:F (660 vs 670 g/kg) when compared to pigs fed the control diet, but there was no evidence of difference (P > 0.05) for d 42 BW, ADG, or ADFI between treatments. From d 42 to 106, there was no evidence of difference (P > 0.05) for ADG, ADFI, and G:F. For the overall finishing period (d 42 to 156) and overall experimental period (d 0 to 156), there was no evidence of difference (P > 0.05) for BW, ADG, ADFI, or G:F. For mortality and removals, there was no evidence of difference (P > 0.05) observed during the nursery, finishing, or overall. In summary, providing MOB during the nursery phase increased G:F in the early and overall nursery phase, but there was no effect on overall wean-to-finish performance.

scholarly journals Improving performance of finishing pigs with added valine, isoleucine, and tryptophan: validating a meta-analysis model

2021 ◽  
Vol 99 (1) ◽  
Author(s):  
Hayden R Kerkaert ◽  
Henrique S Cemin ◽  
Jason C Woodworth ◽  
Joel M DeRouchey ◽  
Steve S Dritz ◽  
...  
Keyword(s):  
Meta Analysis ◽  
Average Daily Gain ◽  
Finishing Pigs ◽  
Analysis Model ◽  
Negative Effects ◽  
Distiller's Grains ◽  
Corn Protein ◽  
Dietary Treatments ◽  
Relative Differences ◽  
Daily Gain

Abstract Based on results of a recent meta-analysis, we hypothesized that increased dietary Val, Ile, or Trp could correct possible amino acid interactions because of excess Leu in diets containing high levels of corn protein, namely dried distiller’s grains with solubles (DDGS). A total of 1,200 pigs (PIC TR4 × (Fast LW × PIC L02); initially 33.6 ± 0.6 kg) were used in a 103-d study. The 6 dietary treatments were corn–soybean meal (SBM)-DDGS-based as follows: (1) high SBM and low level of l-Lys HCl (HSBM), (2) high l-Lys HCl and moderate Ile, Val, Trp (AA above NRC 2012 estimates; NC), (3) moderate l-Lys HCl and high Ile, Val, and Trp (PC), and PC with either increased (4) L-Val (PC+Val), (5) L-Ile (PC+Ile), or (6) L-Trp (PC+Trp). Pigs fed the NC diet were predicted to have the poorest average daily gain (ADG), the PC diet to be intermediate, and pigs fed the HSBM, PC+Val, PC+Ile, and PC+Trp have the same and highest predicted ADG. In the grower period (34 to 90 kg), ADG was greater (Ρ < 0.05) for the pigs fed HSBM and PC+Val diets than the NC with pigs fed other diets intermediate. Pigs fed HSBM were more (Ρ < 0.05) efficient (G:F) than the NC and PC with pigs fed other diets intermediate. In the finisher period (90 to 136 kg), ADG was greater (Ρ < 0.05) for pigs fed PC+Ile than that of the NC with pigs fed other diets intermediate. Pigs fed PC+Val had greater (Ρ < 0.05) average daily feed intake (ADFI) than the NC with pigs fed other diets intermediate. However, PC+Ile pigs were more (Ρ < 0.05) efficient than PC+Val with pigs fed other diets intermediate. Overall, ADG was greater (Ρ < 0.05) for pigs fed HSBM, PC+Val, and PC+Ile diets than the NC with pigs fed other diets intermediate. Pigs fed the PC+Val diet had greater (Ρ < 0.05) ADFI than the NC with pigs fed other diets intermediate. No differences were detected between treatments for overall G:F or other carcass characteristics. In conclusion, increasing Val or Ile in high l-Lys-HCl-DDGS-based diets improved growth performance compared with pigs fed diets containing high levels of l-Lys HCl without added Val and Ile. These results present evidence that the recently developed meta-analysis can predict the relative differences in overall ADG for pigs fed the NC, PC, PC+Val, and PC+Ile diets; however, the predicted G:F was less accurate. The data demonstrate that the negative effects of high Leu concentrations in corn-DDGS-based diets can be reversed by increasing the ratios of Val and Ile relative to Lys.

scholarly journals 191 The effects of a yeast fermentation product on the average daily gain and digestibility on a rye grass hay-based finishing diet for lambs

2019 ◽  
Vol 97 (Supplement_1) ◽  
pp. 74-74
Author(s):  
Justin C Burt ◽  
Jamie Boyd ◽  
Ivan Garcia ◽  
Rebecca Splan ◽  
Brittany S Perron
Keyword(s):  
Block Design ◽  
Statistical Significance ◽  
Average Daily Gain ◽  
Yeast Fermentation ◽  
Fermentation Product ◽  
Ryegrass Hay ◽  
Ad Libitum ◽  
And Gender ◽  
Daily Gain ◽  
Feed Samples

Abstract The purpose of this study was to determine if supplementation of a yeast fermentation product had an effect on the ADG, performance, and meat quality characteristics of Katahdin sheep fed a ryegrass hay based diet in drylot. Twenty-four Katahdin lambs were divided into two groups (male, n = 8; female n = 16) based on weight and gender: a control (CON) and treatment (TRT) used in a repeated block design. The lambs had a BW of 21.5 ± 2.5 kg, and concluded with a finishing weight of 36.3 ± 3.4 kg. Lambs were housed on dirt drylot with shade structures, and offered an ad libitum TMR diet was formulated to be isocaloric and isonitrogenous at 14% CP and was ryegrass hay based, and top dressed with ground corn as a carrier. The TRT received the yeast supplement at a rate of 4/g/h/d. The diet was offered at 2% of the group’s body weight ad libitum. A 1-wk standardization period was conducted before the start of the study to obtain a 5% refusal rate. Orts were collected and recorded, as well as weekly feed samples were collected twice a week, and compiled for a chemical analysis for NDF, ADF, ASH, CP, and ether extract. Temperature and humidity data was also collected throughout the study. Lambs were weighed weekly with a rolling weight being used for the ADG of the lambs. Proc mixed procedures of SAS was used for data analysis. We found no statistical significance in DMI (CON=11.14 ±3.36 kg/d and TRT= 10.89 ±3.55 kg/d per group), and no statistical significance by gender (P < 0.11). There was a statistical significance (P < 0.03), for ADG per group. This suggests that there is a tendency for greater performance and ADG for lambs supplemented with a yeast fermentation product.

THE PERFORMANCE AND THIAMIN STATUS OF PIGS FED SULFUR DIOXIDE TREATED HIGH-MOISTURE BARLEY

1987 ◽  
Vol 67 (3) ◽  
pp. 841-854 ◽  
Author(s):  
D. M. GIBSON ◽  
J. J. KENNELLY ◽  
F. X. AHERNE
Keyword(s):  
Sulfur Dioxide ◽  
Feed Intake ◽  
Average Daily Gain ◽  
Finishing Pigs ◽  
High Moisture ◽  
Liquid Sulfur ◽  
Toxicological Effects ◽  
Diet Mixing ◽  
Dietary Treatments ◽  
Daily Gain

High-moisture barley (HMB) was ensiled or treated with 1% (wt/wt) liquid sulfur dioxide (SO2). Forty-five weanling pigs were allocated to five dietary treatments for 28 d. Diets consisted of: (1) dry barley, diet mixed every 28 d; (2) ensiled HMB, diet mixed daily; (3) SO2-treated HMB, diet mixed every 28 d; (4) SO2-treated HMB, diet mixed daily; (5) SO2-treated HMB, diet mixed daily and supplemented with thiamin. All diets contained 47% barley on a dry matter (DM) basis. Pigs fed diets 2 and 4 continued on test to 85 kg; diets formulated after 28 d contained 75% barley (DM basis). Feed intake, growth rate and feed:gain ratio were not influenced (P < 0.05) by treatment during the 28-d initial trial. For pigs fed SO2-treated HMB to 85 kg, feed intake and average daily gain were reduced by 9.8 and 9.0%, respectively. SO2 treatment effectively preserved high-moisture barley for 18 d at 16 °C; however, 61% of the dietary thiamin was destroyed by 7 d after diet mixing. Pigs fed diet 4 were thiamin depleted at slaughter; with a 38.5% higher erythrocyte thamin pyrophosphate effect, an 83% incidence of cardiac hypertrophy and thiamin levels in meat reduced to 7.6% of that present in the meat of pigs fed untreated HMB. Destruction of dietary thiamin appears to have been the primary factor responsible for reduced animal performance. Reduced ration palatability and toxicological effects on the digestive tract due to 75% SO2 treated grain in the diet (DM basis) may have also contributed to the reduced performance of growing-finishing pigs. Key words: Sulfur dioxide, preservative, barley, pigs, thiamin

scholarly journals 17 The effects of a yeast fermentation product on the average daily gain and digestibility on a rye grass hay based finishing diet for lambs

2019 ◽  
Vol 97 (Supplement_1) ◽  
pp. 10-11
Author(s):  
Justin C Burt ◽  
Jamie Boyd ◽  
Ivan Garcia ◽  
Rebecca Splan ◽  
Brittany S Perron
Keyword(s):  
Block Design ◽  
Statistical Significance ◽  
Average Daily Gain ◽  
Yeast Fermentation ◽  
Fermentation Product ◽  
Ryegrass Hay ◽  
Ad Libitum ◽  
And Gender ◽  
Daily Gain ◽  
Feed Samples

Abstract The purpose of this study was to determine if supplementation of a yeast fermentation product had an effect on the ADG, performance, and meat quality characteristics of Kathadin sheep fed a ryegrass hay based diet in drylot. Twenty-four Katahdin lambs were divided into two groups (male, n = 8; female n = 16) based on weight and gender: a control (CON) and treatment (TRT) used in a repeated block design. The lambs had a BW of 21.5 ± 2.5 kg, and concluded with a finishing weight of 36.3 ± 3.4 kg. Lambs were housed on dirt drylot with shade structures, and offered an ad libitum TMR diet was formulated to be isocaloric and isonitrogenous at 14% CP and was ryegrass hay based, and top dressed with ground corn as a carrier. The TRT received the yeast supplement at a rate of 4/g/h/d. The diet was offered at 2% of the group’s body weight ad libitum. A 1-wk standardization period was conducted before the start of the study to obtain a 5% refusal rate. Orts were collected and recorded, as well as weekly feed samples were collected twice a week, and compiled for a chemical analysis for NDF, ADF, ASH, CP, and ether extract. Temperature and humidity data was also collected throughout the study. Lambs were weighed weekly with a rolling weight being used for the ADG of the lambs. Proc mixed procedures of SAS was used for data analysis. We found no statistical significance in DMI (CON=11.14 ±3.36 kg/d and TRT= 10.89 ±3.55 kg/d per group), and no statistical significance by gender (P < 0.11). There was a statistical significance (P < 0.03), for ADG per group. This suggests that there is a tendency for greater performance and ADG for lambs supplemented with a yeast fermentation product.

scholarly journals PSIII-10 Effect of WUR genotype on resilience to a polymicrobial natural disease challenge in pigs

2019 ◽  
Vol 97 (Supplement_2) ◽  
pp. 165-165
Author(s):  
Ryan L Jeon ◽  
Austin M Putz ◽  
Michael Dyck ◽  
John C S Harding ◽  
Frederic Fortin ◽  
...  
Keyword(s):  
Mixed Model ◽  
Linear Mixed Model ◽  
Flow System ◽  
Average Daily Gain ◽  
Nucleotide Polymorphism ◽  
Swine Industry ◽  
Single Nucleotide ◽  
System A ◽  
Limited Effectiveness ◽  
Daily Gain

Abstract Porcine Reproductive and Respiratory Syndrome (PRRS) is caused by a virus that poses a threat to the global swine industry, costing the U.S. industry over 664 million dollars annually. Vaccination has limited effectiveness due to the virus’ antigenic and genetic shifts. Leveraging genetics to develop more resilient swine can, however, mitigate the effects of PRRS. Previous studies identified a Single Nucleotide Polymorphism (SNP) near the GBP5 gene (WUR) that was associated with resistance and resilience to PRRS, with the G allele being favorable over A. The objective of this study was to determine whether the WUR SNP is also associated with resilience to a polymicrobial natural disease challenge. Using a continuous flow system, a new batch of 60-75 naïve Yorkshire x Landrace nursery piglets was introduced every three weeks into a natural challenge facility that was initially seeded with multiple diseases, including PRRS. Traits recorded were growth rate, feed intake, backfat, loin depth, veterinary treatments, and mortality. Pigs were genotyped using a 600K SNP chip. Data from 2133 pigs were analyzed using a univariate linear mixed model that included, pen, litter, and animal genetics as random effects and WUR genotype as a fixed effect. Frequencies were 0.85, 0.14, and 0.01 for AA, AG, and GG. The G allele was favorable for most traits, with the contrast of AA vs AG significant for average daily gain in the nursery (0.339 vs 0.365 kg/d, p = 0.013) and number of treatments (2.48 vs 2.16 over 180 days, p = 0.072). Mortality rate was 26.0% for AA and 23.8% for AG (not significantly different). In conclusion, the G allele at the WUR SNP is potentially also associated with resilience to multi-factorial disease. Funded by Genome Canada, Genome Alberta, Genome Prairie, PigGen Canada, and USDA-NIFA.

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