scholarly journals Influence of growth rate, backfat thickness and meatiness on reproduction efficiency in Landrace gilts

2011 ◽  
Vol 50 (No. 12) ◽  
pp. 535-544 ◽  
Author(s):  
R. Bečková ◽  
P. Daněk ◽  
E. Václavková ◽  
M. Rozkot
Keyword(s):  
Weight Gain ◽  
Significant Influence ◽  
Performance Test ◽  
Negative Impact ◽  
Reproductive Traits ◽  
Backfat Thickness ◽  
Daily Weight Gain ◽  
Weaned Piglets ◽  
Lean Meat ◽  
Litter Weight

In the nucleus herd and subsequent multiplication herd of the Landrace (L) breed in 262 gilts farrowed after the first insemination we analysed the influence of various levels of average daily weight gain from birth in the performance test in the field (ADG1) and till mating (ADG2), average backfat thickness (mm) in the performance test (BF1) and at mating (BF2) or lean meat percentage (LM1 and LM2) on the age and weight at mating and at farrowing, on the number of piglets born, piglets born alive and weaned ones and litter weight at 21 days. Based on the studied traits the gilts were divided into intervals for the evaluation according to the average and standard deviation (≤ x – s; x – s; x + s; ≥ x + s). A significant influence of ADG1 and ADG2 on the weight at the first insemination was observed (P < 0.01, P < 0.001). The age and weight after farrowing were affected by ADG1 to a greater extent (P < 0.001). With increasing values of weight gain a higher number of piglets per litter was observed. ADG1 affected the number of piglets born and also of piglets born alive (P < 0.001), the litter weight at 21 days (sows’ milk production) and the number of weaned piglets (P < 0.05). ADG2, however, affected only the number of piglets born and of piglets born alive per litter (P < 0.05, P < 0.001). BF1 affected only the age at the first insemination or at farrowing (P < 0.05) and the number of piglets at the age of 21 days (P < 0.05). BF2 affected the number of piglets born, those born alive and the weaned ones (P < 0.05, P < 0.01), the litter weight at 21 days (P < 0.001) and the number of piglets at 21 days (P < 0.05, P < 0.01). The lean meat percentage ascertained in the performance test (LM1) did not significantly affect any studied reproduction trait. A significant influence of LM2 on the age at the first insemination or at farrowing was proved (P < 0.05, P < 0.01) as well as on the weight at the first fertile insemination (P < 0.001). An increased percentage of lean meat had a negative impact on the number of piglets born and piglets born alive (P < 0.05), on litter weight at 21 days (P < 0.01), number of piglets at the age of 21 days (P < 0.001) and on the number of weaned piglets (P < 0.05, P < 0.01). A more significant influence of the higher growth ability of gilts on the reproductive traits was detected in the performance test. On the contrary, at the period of mating the reproductive traits were affected by backfat thickness and meatiness to a greater extent.  

scholarly journals The use of performance test parameters for selection of gilts before their placement into breeding

2011 ◽  
Vol 51 (No. 6) ◽  
pp. 253-261 ◽  
Author(s):  
N. Kernerová ◽  
J. Václavovský ◽  
V. Matoušek ◽  
Z. Hanyková
Keyword(s):  
Performance Test ◽  
Performance Testing ◽  
Live Weight ◽  
Regression Function ◽  
Backfat Thickness ◽  
Daily Weight Gain ◽  
Large White ◽  
Lean Meat ◽  
Meat Content ◽  
Richards Function

The objectives of the paper were to evaluate carcass value in reared gilts on the basis of carcass analysis during the station test of purebred progeny of pigs and ultrasonically with Sonomark-100 or Piglog-105 instruments in the framework of valid methodology for performance testing, and to verify a pos-sibility of prediction of backfat thickness and/or average daily weight gain since birth and lean meat content of gilts as the elements of objectification for the evaluation of their body condition. In total 54 gilts of two breeds were evaluated: the dam breed Czech Large White and the sire breed Czech Large White &ndash; sire line. Four-parameter Richards function was used for growth evaluation. The regression function y = 63.870 &ndash; 0.447 bt<sub>1</sub> &ndash; 0.510 bt<sub>2</sub> + 0.128 MLLT was applied in ultrasonic instruments for the calculation of lean meat content. We calculated linear regression functions for the conversion of performance testing parameters (gain from birth, average backfat thickness and lean meat content) from live weight on the day of measurement per live weight declared during selections in gilts. &nbsp;

scholarly journals Phenotypic correlation of characteristics in the gilt performance test with an average number of live-born piglets through all achieved births, during the reproductive exploitation

2019 ◽  
Vol 71 (4) ◽  
pp. 1375-1386
Author(s):  
I. Radović ◽  
S. Dragin ◽  
N. Katanić ◽  
D. Beuković ◽  
I. Stančić ◽  
...  
Keyword(s):  
Weight Gain ◽  
Performance Test ◽  
Statistical Significance ◽  
Future Generation ◽  
Daily Weight Gain ◽  
Phenotypic Correlation ◽  
Weaned Piglets ◽  
Process Data ◽  
Independent Variables ◽  
Selection Of

ABSTRACT Reproductive efficacy of sows dictates the level of profitability of the production itself, and the moment of testing and selection of gilts for breeding (as the parents of a future generation), represents a very important moment. Given the fact that the selection of gilts for breeding is partly based on the weight-gain in the test, in this study we examined the influence of a daily weight-gain of gilts in the test of the manifestation of important reproductive characteristics - the size of the litter of the first and the other parities, as well as the percentage of sows that gave birth in relation to previous breeding process. Data of the 11637 tested gilts that completed the performance test have been used for the test. The studied characteristics were: the weight-gain at the end of the test, the number of live-born piglets, the number of stillborn piglets and the number of grown-weaned piglets in the first litter and the total number of live-born piglets, the total number of stillborn piglets and the total number of grown-weaned piglets. The results obtained in this study showed the effect of weight-gain in the reproductive efficacy test in the number of the live-born piglets in the first and from the 2nd to the 9th parity, as well as the percentage of the sows included in the next breeding process. By including all selected independent variables that showed the adequate statistical significance in correlation with the dependent variable, the determination coefficient rises to a value of 0.098 which represents 9.80% of the influence on the dependent variable, that can be explained by the independent variable, which leads to the conclusion that the binding strength between the variable "average live" and all the independent variables: “the number of litters”, the MLD depth” and “the back-fat thickness”, is very weak, which is not a rare case in multiple regression.

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

Association between lean meat percentage and average daily weight gain in Danish slaughter pigs

2011 ◽  
Vol 101 (1-2) ◽  
pp. 121-123 ◽  
Author(s):  
H. Stege ◽  
T.B. Jensen ◽  
J. Bagger ◽  
F. Keller ◽  
J.P. Nielsen ◽  
...  
Keyword(s):  
Weight Gain ◽  
Daily Weight Gain ◽  
Average Daily Weight Gain ◽  
Lean Meat ◽  
Slaughter Pigs

Organic grass pea (Lathyrus sativus L.) seeds as a protein source for weaned piglets: Effects of seed treatment and different inclusion rates on animal performance

2015 ◽  
Vol 31 (3) ◽  
pp. 269-279 ◽  
Author(s):  
L. Baldinger ◽  
W. Hagmüller ◽  
U. Minihuber ◽  
M. Schipflinger ◽  
W. Zollitsch
Keyword(s):  
Weight Gain ◽  
Hydrothermal Treatment ◽  
Feed Intake ◽  
Control Diet ◽  
Daily Weight Gain ◽  
Grass Pea ◽  
Weaned Piglets ◽  
Protein Sources ◽  
Feeding Trials ◽  
Pea Seeds

AbstractOrganically produced pork occupies only a small niche in the European meat market, with one of the main reasons being the shortage of locally produced high-quality protein sources. In an effort to promote currently under-utilized protein sources, two feeding trials were conducted with grass pea seeds as feed for weaned piglets. The grass pea (Lathyrus sativus L.) is a hardy grain legume that produces protein-rich seeds, but, as other grain legumes, it contains several anti-nutritive compounds. Apart from trypsin inhibitors and tannins, it also contains the neurotoxin β-N-oxalyl-L-α,β-diaminopropionic acid (ODAP) which may cause nerve damage in farm animals as well as humans. The content of both trypsin inhibitors and ODAP can be greatly reduced by hydrothermal treatment; therefore both raw and hydrothermally treated grass pea seeds were used in the two feeding trials. Diets were fed to 152 and 144 piglets [crosses of (Pietrain × Duroc) × (Landrace × Large White)] respectively, during their rearing phase directly after weaning. In experiment 1, a control diet was compared with two diets containing 10 and 20% raw grass pea seeds, plus one diet with 20% treated grass pea seeds, respectively (as fed basis). In experiment 2, a control diet was compared with one diet containing 20% raw grass pea seeds and two diets containing 20 and 30% treated grass pea seeds, respectively (as fed basis). Grass pea seeds contained 265 and 271 g kg−1 crude protein (as fed basis) in the first and second experiment, respectively, and had an amino acid profile similar to peas (Pisum sativum), including relatively low contents of methionine and cysteine. Hydrothermally treated grass pea seeds were found to be a valuable protein source that was well accepted by piglets. At an inclusion rate of 20–30% in diets, feed intake and daily weight gain of piglets was very similar to that of the control treatment. However, including 20% raw grass pea seeds had a significant negative effect on feed intake in experiment 1 and on daily weight gain in experiment 2. Therefore, hydrothermal treatment of grass pea seeds is recommended prior to feeding to piglets.

scholarly journals PSVI-7 Increased consumption of Methionine as DL-Methionine or OH-Methionine improved pigs growing performance and carcass traits under hot conditions

2020 ◽  
Vol 98 (Supplement_3) ◽  
pp. 201-201
Author(s):  
Caio A da Silva ◽  
Marco A Callegari ◽  
José Henrique Barbi ◽  
Naiara Fagundes ◽  
Cleandro P Dias ◽  
...  
Keyword(s):  
Weight Gain ◽  
Growth Performance ◽  
Carcass Traits ◽  
Live Weight ◽  
Daily Weight Gain ◽  
Feed Conversion ◽  
Carcass Yield ◽  
Lean Meat ◽  
Adequate Dose ◽  
Significant Difference

Abstract This study aimed to determine the effects of increasing Methionine (Met) supply on growth performance and carcass traits of growing-finishing pigs under summer conditions in Brazil. A total of 200 barrows and females, 63 d-old (20.43±2.0 kg), were allocated in a 2 x 2 factorial design (two Met sources [DL-Met and OH-Met] and two Met doses [100 and 120% Brazilian Nutritional recommendation) with 10 replicates of 5 animals each. Corn-DDGS-wheat-soya based diets were formulated. Treatments were offered during four phases: growing I (63-93 d old), growing II (94-114 d old), finishing I (115-142 d old) and finishing II (143-160 d old). The recommended digestible Met levels were: 0.32, 0.30, 0.29 and 0.24% respectively for the four phases. Average temperature was 27.12 ± 4.51ºC and relative humidity was 61.72 ± 5.65%. Growth performance was measured for each rearing phase. Carcass yield, back fat height, loin depth, and lean meat yield were measured at the end of the experiment. Data were submitted to a 2-way ANOVA and Tukey test. There was no significant interaction between the Met source and the dose for all performance and carcass traits. Feed intake and feed conversion ratio were similar between treatments (P &gt;0.05). The individual daily weight gain and live weight were better for the highest doses of methionine (P&lt; 0.05) in all phases and on the whole period, except for the finishing II where the weight gain was similar for all treatments. Likewise, carcass yield, lean meat was increased with the highest dose of methionine in comparison to the adequate dose. No significant difference was found between DL-Met and OH-Met on growth performance parameters. OH-Met resulted in a higher loin depth (58.37 mm) in comparison to DL-Met (55.21 mm). Overall, these results demonstrated the interest of increasing Met supply under hot conditions to improving performance and carcass quality traits.

scholarly journals Available phosphorus levels in diets for pigs with high genetic potential for lean meat deposition kept in thermoneutral environment from 15 to 30 kg

2011 ◽  
Vol 40 (2) ◽  
pp. 323-330 ◽  
Author(s):  
Leandro Alebrante ◽  
Juarez Lopes Donzele ◽  
Rita Flávia Miranda de Oliveira ◽  
Alysson Saraiva ◽  
Simone Eliza Facioni Guimarães ◽  
...  
Keyword(s):  
Weight Gain ◽  
Bone Mineralization ◽  
Block Design ◽  
Daily Weight Gain ◽  
Experimental Unit ◽  
Available Phosphorus ◽  
Feed Conversion ◽  
Lean Meat ◽  
Genetic Potential ◽  
Randomized Block Design

It was used 72 pigs, 36 castrated males and 36 females, with initial weight of 14.97 ± 0.36 kg to evaluate levels of dietary available phosphorus (aP). The animals were distributed in a completely randomized block design, with six levels of aP (0.107; 0.214; 0.321; 0.428; 0.535 and 0.642%), six replicates and two animals (one castrated male and one female) per experimental unit. Air temperature and relative humidity in the room were kept at 24.5 ± 1.2°C and 76.3 ± 8.5%, respectively. The levels of aP influenced both daily feed intake and daily weight gain, which increased in a quadratic way up to the estimated levels of 0.420% and 0.443%, respectively and feed conversion, which improved in a quadratic manner up to the estimated level of 0.461%. It was observed the effects of levels of aP on quantity of phosphorus and ash in the bone, which increased in a quadratic manner up to the estimated levels of 0.525% and 0.520%, respectively. Levels of Ap affected daily protein deposition in the carcass, which increased in a quadratic way up to the estimated level of 0.394%. There was no effect of levels of aP on daily fat carcass deposition. Levels of aP that provided the best results for daily weight gain, feed conversion and bone mineralization in swines with high genetic potential for lean meat kept in thermoneutral environment, from 15 to 30 kg are 0.443, 0.461 and 0.525%, respectively, corresponding to estimated daily intakes of 5.25, 5.45 and 6.14 g of aP.

scholarly journals Effect of Birth Weight of Piglets on Their Growth Ability, Carcass Traits and Meat Quality

2017 ◽  
Vol 65 (1) ◽  
pp. 119-123 ◽  
Author(s):  
Pavel Nevrkla ◽  
Eva Václavková ◽  
Zdeněk Hadaš ◽  
Vendula Kamanová
Keyword(s):  
Weight Gain ◽  
Birth Weight ◽  
Intramuscular Fat ◽  
Fat Content ◽  
Group Iv ◽  
Daily Weight Gain ◽  
Drip Loss ◽  
Lean Meat ◽  
Slaughter Weight ◽  
Intramuscular Fat Content

The objective of this study was to investigate the effect of birth weight on growth performance and carcass quality. Data were collected from 80 crossbred piglets. Individual body weight was measured at birth, at the age of 21, 28 and 38 days, 4 weeks before slaughter, 2 weeks before slaughter and one day before slaughter. Average daily weight gains in separate intervals were calculated. Fattening period was finished at the same day for all pigs. Lean meat percentage and pH1 value were measured after slaughter, drip loss and intramuscular fat content were analysed in laboratory. Data were divided into 4 groups according to the birth weight of piglets (I: less than 1000 g, II: 1001 – 1200 g, III: 1201 – 1500 g, IV: 1501 g and more). Increased birth weight resulted in increased daily weight gain from birth to weaning (28 days), after weaning and also from birth to slaughter (P ≤ 0.05, P ≤ 0.01). The high daily weight gain in group IV enabled pigs to reach the slaughter weight one month earlier than pigs from group II. The lowest lean meat content (52.74 ± 2.82 %) was found in group IV. This is connected with high slaughter weight (132.50 ± 7.27 kg). Intramuscular fat content, pH1 value and drip loss were not affected by birth weight of piglets.

scholarly journals Performance, lean meat proportion and behaviour of fattening pigs given a liquid diet at different animal/feeding-place ratios

2006 ◽  
Vol 82 (4) ◽  
pp. 575-580 ◽  
Author(s):  
D. K. Rasmussen ◽  
R. Weber ◽  
B. Wechsler
Keyword(s):  
Weight Gain ◽  
Ingestion Rate ◽  
Video Recording ◽  
Live Weight ◽  
Daily Weight Gain ◽  
Feeding System ◽  
Lean Meat ◽  
Animal Feeding ◽  
The Individual ◽  
Fattening Pigs

AbstractSensor feeding is a liquid feeding system for fattening pigs that is operated with a restricted animal/feeding-place ratio (AFR). The aim of the present study was to quantify the effect of three different AFRs (4:1, 7:1 and 13:1, calculated with a feeding space of 33 cm per animal) on the performance and behaviour of fattening pigs (mean initial weight 26·3 (s.d. 3·3) kg, live weight at slaughter 102 (s.d. 5) kg). The pigs were housed in groups of 40 and each AFR was tested with seven groups (21 groups in total). The daily weight gain of the individual pigs was calculated from the beginning of the experiments until slaughter. Additionally, the lean meat percentage was recorded (AutoFOM). Feeding behaviour was observed by means of 24-h video recording at the ages of 14 and 17 weeks with scan sampling every 5 min. The daily weight gain decreased with increasing AFR (P<0·01) and females had lower weight gains than barrows (P<0·001). The lean meat proportion was influenced by the AFR (P<0·01) and sex of the pigs (P<0·001). Proportions were highest with the AFR 13:1 and in females. The average number of pigs feeding simultaneously was highest for the AFR of 4:1 (P<0·01). Moreover, the ingestion rate per day (kg/min) increased with increasing AFR (P<0·05). The average number of pigs waiting behind other pigs feeding at the trough was highest with the AFR 13:1 (P<0·001).In conclusion, growth performance and pig behaviour were negatively affected by an AFR of 13:1, which cannot be recommended for use with this feeding system. With an AFR of 4:1 lean meat values were low.

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