scholarly journals 352 Associations between day one piglet serum immunocrit ratio and subsequent growth during gilt development

2019 ◽  
Vol 97 (Supplement_2) ◽  
pp. 146-146
Author(s):  
China Supakorn ◽  
Clay A Lents ◽  
Xochitl Martinez ◽  
Jeff Vallet ◽  
R Dean Boyd ◽  
...  
Keyword(s):  
Growth Performance ◽  
Fixed Effects ◽  
Growth Traits ◽  
Average Daily Gain ◽  
Least Square ◽  
Backfat Thickness ◽  
Subsequent Growth ◽  
Weaning Weight ◽  
Weight Category ◽  
Neonatal Piglet

Abstract Colostrum intake affects gut development in the neonatal piglet. The pig’s subsequent growth performance and viability may be affected by colostrum intake. Immunoglobulin uptake can be effectively estimated from the piglet’s immunocrit ratio (IR). The objective of this study was to determine the association between IR and growth performance from weaning to 200 days. Associations between serum IR measures and subsequent growth performance such as body weight, backfat thickness, caliper reading, and flank-to-flank distance at weaning (WW), 100, 142, 160, and 200 days, average daily gain (ADG) between weaning to 100 days (ADG1), and ADG between 100 to 200 days (ADG2) were evaluated. The IR measures were collected from 2,715 female piglets on Day 1 at Circle 4 Farms, Milford, UT and measured by USMARC. The IR evaluation was divided into 5 groups: lowest (0.05 < IC; n = 90), low (0.05 ≤ IC < 0.1; n = 362), medium (0.1 ≤ IC < 0.15; n = 1,314), high (0.15 ≤ IC < 0.2; n = 949), and highest (IC ≥ 0.2; n = 141), respectively. Weaning weight, subsequent growth performance, and ADG least square mean for each IR category were analyzed using PROC GLM and PDIFF option for mean comparisons. Fixed effects for post-weaning growth traits were contemporary group (week x room), development diet, and birth weight category. Development diet was not included in the model for WW. Gilts from high and highest IR had significantly (P < 0.05) greater weaning weight (6.5 ± 0.1 kg and 6.5 ± 0.1 kg, respectively), backfat thickness, caliper reading, and flank-to-flank distance at 100 to 200 days, ADG1 (0.45 ± 0.004 kg/day and 0.45 ± 0.007 kg/day, respectively) and ADG2 (0.79 ± 0.005 kg/day and 0.81 ± 0.001 kg/day, respectively) when compared to gilts from lowest IR (5.9 ± 0.2 kg for WW, 0.39 ± 0.008 kg/day for ADG1, and 0.75 ± 0.01 kg/day for ADG2). These data support the concept that neonatal piglet colostrum intake results in improved subsequent growth performance.

Genetic parameter estimates for growth traits of Gansu Alpine Finewool sheep

2012 ◽  
Vol 52 (5) ◽  
pp. 321 ◽  
Author(s):  
Wenhui Li ◽  
Ian W. Purvis
Keyword(s):  
Fixed Effects ◽  
Genetic Parameters ◽  
Growth Traits ◽  
Average Daily Gain ◽  
Genetic Effects ◽  
Western China ◽  
Parameter Estimates ◽  
Weaning Weight ◽  
Likelihood Ratio Testing ◽  
Daily Gain

Estimation of genetic parameters for growth traits of Gansu Alpine Finewool sheep that separately identify maternal effects has not been previously conducted. (Co)variance components and corresponding genetic parameters for lamb growth traits were estimated from Gansu Alpine Finewool sheep maintained at Gansu Sheep Breeding Technology Extension Station in north-western China. Records of 17 703 lambs at birth, born over 9 years (2000–2008) and sired by 315 rams, were used in the study. Birth type, sex, dam age, record age and birth year were fitted as fixed effects. Analyses were carried out using a restricted maximum likelihood procedure (ASReml). Six different animal models were fitted for all traits and the most appropriate model was selected through log-likelihood ratio testing. After identifying the appropriate model through single-trait analysis, bivariate analyses were used to obtain the phenotypic and genetic correlations among the growth traits. In addition to the direct genetic effect, and maternal genetic effects, significant negative correlations between direct genetic and maternal genetic effects were found for all the growth traits. The maternal permanent environmental effects were only significant for birthweight, weaning weight and pre-weaning growth rate. The estimates of direct heritability for birthweight, weaning weight, pre-weaning average daily gain, post-weaning average daily gain and yearling weight were 0.22, 0.16, 0.15, 0.27 and 0.19 respectively. The maternal heritability estimates were relatively high and ranged from 0.17 to 0.27. The study provides the breed and its associated finewool sheep industry with a more encompassing basis for designing more effective breeding programs for improvement of growth traits of Gansu Alpine Finewool sheep.

scholarly journals 191 Effects of injectable vitamin C at weaning and prior to transit on growth performance and immune function of beef steers

2020 ◽  
Vol 98 (Supplement_4) ◽  
pp. 152-153
Author(s):  
Aubree M Beenken ◽  
Erin L Deters ◽  
Colten W Dornbach ◽  
Stephanie L Hansen ◽  
Joshua C McCann ◽  
...  
Keyword(s):  
Vitamin C ◽  
Growth Performance ◽  
Repeated Measures ◽  
Fixed Effects ◽  
Average Daily Gain ◽  
Experimental Unit ◽  
Beef Steers ◽  
Diarrhea Virus ◽  
Plasma Ascorbate ◽  
Antibody Titers

Abstract Ninety-one early-weaned (65 ± 11 d) Angus steers (92 ± 4 kg) were blocked by age to a 2 × 2 factorial examining effects of injectable vitamin C (VC) at weaning and/or prior to transport to the feedlot on antibody titers and growth performance. Injections (20 mL/steer) of VC (250 mg sodium ascorbate/mL) or saline (SAL) were given at time of weaning on d 0 (WEAN) and/or prior to a 6 hr trucking event to a feedlot on d 49 (TRANS). Steers were given booster vaccinations on d 0. Steers were weighed on d 0, 1, 14, 48, 49, 64, 106, and 107. Blood was collected (12 steers/treatment) on d 0, 1, 2, 14, 49 (pre- and post-transit), 50, and 51. Data were analyzed via Proc-Mixed of SAS (experimental unit = steer; n = 22–23/treatment) with fixed effects of block, WEAN, TRANS, and WEAN × TRANS. Plasma ascorbate concentrations for weaning (d 0, 1, and 2) and transit (d 49-pre-trucking, 49-post-trucking, 50, and 51) were analyzed as repeated measures (repeated effect = day). Plasma ascorbate concentrations were greater on d 1 and 2 for steers that received VC at weaning (VC = 19.6, SAL = 8.8 ± 1.26 µM; WEAN × day P &lt; 0.01). Similarly, ascorbate concentrations were greater on d 49 post-trucking, 50, and 51 for steers that received VC pre-transit (TRANS × day P = 0.01). Treatments did not affect bodyweight or average daily gain throughout the trial (P &gt; 0.32). There were no effects of treatment on serum Bovine Viral Diarrhea Virus type 2 antibody titers on d 14 or 51 (P &gt; 0.33). An injection of VC administered to early weaned beef steers at weaning or pre-transit increases plasma ascorbate concentrations but does not improve growth performance or antibody response to vaccination booster.

scholarly journals 138 Effects of Increasing Soybean Meal in Corn-based Diets on Growth Performance of Late-finishing Pigs

2021 ◽  
Vol 99 (Supplement_1) ◽  
pp. 70-71
Author(s):  
Julia P Holen ◽  
Robert D Goodband ◽  
Mike D Tokach ◽  
Jason C Woodworth ◽  
Joel M DeRouchey
Keyword(s):  
Amino Acids ◽  
Growth Performance ◽  
Soybean Meal ◽  
Fixed Effects ◽  
Average Length ◽  
Average Daily Gain ◽  
Random Effect ◽  
Finishing Pigs ◽  
Distillers Grains With Solubles ◽  
Dietary Treatments

Abstract Two experiments were conducted to determine the effects of increasing levels of soybean meal (SBM) replacing feed grade amino acids in corn or corn-dried distillers grains with solubles (DDGS)-based diets on growth performance of late finishing pigs. In both experiments, there were 22 to 27 pigs per pen and 14 pens per treatment. Average length of the experiments was 35 (Exp. 1) and 29 days (Exp. 2). Diets were balanced to contain 0.70% SID Lys and 2,667 or 2,610 kcal NE/kg for Exp. 1 and 2, respectively. Minimum amino acid ratios relative to Lys were: Ile, 55; Met&Cys, 60; Thr, 65; Trp, 19.5, and Val, 70. Dietary crude protein ranged from 10.1 to 15.2 for Exp. 1 and 13.6 to 19.4 for Exp. 2. The statistical model considered fixed effects of treatment, linear and quadratic contrasts, and random effect of block. In Exp.1, 1,793 pigs (L337×1050, PIC; initially 104.9 ± 1.4 kg) were fed corn-based diets and pens of pigs were assigned to 1 of 5 dietary treatments with increasing SBM from 5 to 20%. Overall, average daily gain (ADG) and gain-to-feed (G:F) increased (linear; P &lt; 0.05) as SBM increased with the greatest improvement observed as SBM increased from 5 to 8.75%, with little improvement thereafter. In Exp. 2, 1,827 pigs (L337×1050, PIC; initially 97.9 ± 1.1 kg) were used in a similar study as Exp. 1, but all diets contained 25% DDGS and SBM levels increased from 0 to 16%. Overall, G:F and final bodyweight of pigs marginally improved (linear and quadratic, respectively; P &lt; 0.10) as SBM increased, with the greatest performance observed when diets contained 8% SBM. These results suggest that increasing SBM up to 8% at the expense of feed grade amino acids in corn or corn-DDGS-based diets improved ADG or G:F in late-finishing pigs.

scholarly journals The Impact of Selection using Residual Average Daily Gain and Marbling EPDs on Growth Performance and Carcass Traits in Angus Steers

2019 ◽  
Vol 3 (2) ◽  
Author(s):  
T. R. Krause ◽  
E. R. Moore ◽  
J. Duggin ◽  
J. R. Segers ◽  
T. D. Pringle
Keyword(s):  
Growth Performance ◽  
Feed Efficiency ◽  
Average Daily Gain ◽  
Backfat Thickness ◽  
Feeding Trial ◽  
Body Weights ◽  
Selection For ◽  
Carcass Merit ◽  
The Impact ◽  
Daily Gain

ObjectivesProfitability in the beef industry has narrow margins regulated by revenue from output traits like growth and carcass merit, but profitability is also largely impacted by input expenses like feed costs. Selecting for improvements in feed efficiency during the finishing phase, one of the most feed intensive segments of the industry, can help to mitigate those input costs. This study compared growth performance, feed efficiency, body composition, and carcass characteristics in Angus steers (n = 321) from bulls divergently selected for feed efficiency and marbling.Materials and MethodsAngus sires were selected based on high (10th percentile or better) and low (85th percentile or worse) residual average daily gain (RADG) EPD as well as high (fifth percentile or better) and average (near 50th percentile) marbling (MARB) EPD. These criteria resulted in a 2 × 2 factorial design with four breeding lines: high RADG/high MARB, high RADG/average MARB, low RADG/high MARB, low RADG/average MARB. Data were analyzed using MIXED procedures of SAS with RADG and MARB as main effects. Significance was set at α = 0.05. Generation was also analyzed, where generation one (GEN1) steers were from a selected sire while generation two (GEN2) steers were from a selected sire and a selected dam.ResultsUltrasound and carcass data revealed no differences (P ≥ 0.12) in 12th rib backfat thickness from weaning through slaughter for the RADG EPD groups. Yield grade and dressing percent did not differ (P ≥ 0.56) across RADG or MARB groups. At the beginning and end of the feeding trial, the high RADG (P ≤ 0.02) group had larger ultrasound ribeye area (REA) than the low RADG group. Carcass REA tended (P = 0.08) to be larger in the high versus low RADG steers. During the feedlot trial and through slaughter, body weight was heavier (P ≤ 0.006) for the high versus low RADG steers but did not differ (P ≥ 0.44) across MARB EPD. Feed efficiency measures did not differ (P ≥ 0.32) across RADG or MARB groups apart from the tendency (P = 0.08) for residual feed intake to be lower in the high versus low RADG steers. Marbling scores differed (P ≤ 0.04) across RADG and MARB groups with the low RADG steers and the high MARB steers having improved marbling. The quality grade distribution across MARB EPD revealed that the average MARB steers graded 73% Choice and 25% Prime while the high MARB steers graded 56% and 42%, respectively. Slice shear force did not differ (P ≥ 0.32) across RADG or MARB EPD. Body weights tended (P = 0.06) to be heavier at the start of the feeding trial for GEN1 versus GEN2 steers. Total gain, average daily gain, and feed to gain (F:G) differed by generation (P ≤ 0.007) with increased rates of gain and reduced F:G in the GEN2 versus GEN1 steers. Body weights did not differ (P = 0.72) across GEN at the end of the feeding trial. Backfat thickness at the start and end of the feedlot phase was less (P ≤ 0.03) and marbling score was improved (P = 0.02) in the GEN2 versus GEN1 steers, respectively.ConclusionThese results suggest that selection using RADG EPD has negligible impacts on meat quality; and that progress in selection for efficiency can be achieved while advancing carcass quality and value. Furthermore, continued divergent selection for feed efficiency and marbling has the potential to improve feed efficiency through advancements in the rate of gain, while enhancing carcass merit through marbling.

scholarly journals Evaluación fenotípica y genética para características de crecimiento en la raza criolla colombiana Costeño con Cuernos

2007 ◽  
Vol 7 (2) ◽  
pp. 12 ◽  
Author(s):  
Rodrigo Alfredo Martínez ◽  
Juan Esteban Pérez ◽  
Teófilo Herazo
Keyword(s):  
Birth Weight ◽  
Variance Components ◽  
Fixed Effects ◽  
Genetic Parameters ◽  
Growth Traits ◽  
Phenotypic Correlation ◽  
Phenotypic Variance ◽  
Direct Effects ◽  
Weaning Weight ◽  
Number Of Births

<p>Se establecieron componentes de varianza, así como parámetros fenotípicos y genéticos, respecto de las variables ‘peso al nacimiento’, ‘peso al destete’ (ajustado a los 270 días) y ‘peso a los 480 días’ en un hato del ganado criollo colombiano Costeño con Cuernos. Se analizaron 2.281 registros de pesos al nacer, 1.722 de pesos al destete  y 1.086 de pesos ajustados a los 480 días utilizando la metodología de máxima verosimilitud restringida (DFREML). También se ajustó un modelo animal que incluyó efectos genéticos directos, maternos y de ambiente permanente, asumiendo como efectos fijos el año de nacimiento, el sexo del ternero y el número de partos de la madre; finalmente, se estimaron los parámetros genéticos ‘heredabilidad’, ‘repetibilildad’ y se establecieron correlaciones genéticas y fenotípicas. Se reportan bajas estimaciones de heredabilidad de los efectos directos, que varían entre 0,17 ± 0,001 y 0,21 ± 0,074 para los pesos al nacer y al destete, respectivamente; así mismo, fue baja la heredabilidad de los efectos genéticos maternos con relación al peso al nacimiento, aunque estos estimados aumentaron respecto de los pesos al nacer y al destete. Las correlaciones entre efectos directos y maternos fueron negativas, pero el mayor valor se encontró para el peso al nacimiento (-0,89). La contribución del ambiente permanente como proporción de la varianza fenotípica total fue baja y disminuyó a medida que aumentó la edad del animal.</p><p> </p><p><strong>Genetic and phenotypic evaluation to characterize growth traits of the native Colombian breed Costeño con Cuernos</strong></p><p>For a herd of native Colombian breed of cattle -Costeño con Cuernos (CCC)- estimates of variance components for phenotypic and genetic parameters were obtained for birth weight, weight at weaning (adjusted to 270 days) and weight at 480 days. Using the restricted maximum likelihood (REMI) methodology, 2281 birth weight records (PN), 1722 weaning weight records and 1086 weight records adjusted to 480 days were analyze by fitting a model which included direct and maternal genetics effects as well as permanent environmental effects, assuming that fixed effects were year of birth weight, calf gender and the mother number of births. The genetic parameters for heritability, repeatability, genetic and phenotypic correlation were estimated and genotypic and phenotypic correlation was established. Heritability estimates for direct effects are low and range from 0.17 ± 0.001 and 0.21 ± 0.074 for birth and weaning weight respectively; while estimates for maternal genetics effects were also low for PN, they were higher for weaning weight and weight at 480 days. There was a negative correlation between direct and maternal effects, and the higher value was for PN (-0.89). The contribution of the variable permanent environment measured as the contribution of the phenotypic variance was low and diminished as animal age increased.</p>

scholarly journals Associations Between IGF1, IGFBP2 and TGFß3 Genes Polymorphisms and Growth Performance of Broiler Chicken Lines

Animals ◽  
2020 ◽  
Vol 10 (5) ◽  
pp. 800
Author(s):  
Bozena Hosnedlova ◽  
Katerina Vernerova ◽  
Rene Kizek ◽  
Riccardo Bozzi ◽  
Jaromir Kadlec ◽  
...  
Keyword(s):  
Growth Performance ◽  
Growth Traits ◽  
Average Daily Gain ◽  
Carcass Traits ◽  
Production Performance ◽  
Thigh Muscle ◽  
Gene Marker ◽  
Snp Analysis ◽  
Nucleotide Polymorphisms ◽  
Value Association

Marker-assisted selection based on fast and accurate molecular analysis of individual genes is considered an acceptable tool in the speed-up of the genetic improvement of production performance in chickens. The objective of this study was to detect the single nucleotide polymorphisms (SNPs) in the IGF1, IGFBP2 and TGFß3 genes, and to investigate their associations with growth performance (body weight (BW) and average daily gain (ADG) at 14, 21, 28, 35 and 42 days of age) and carcass traits in broilers. Performance (carcass) data (weight before slaughter; weights of the trunk, giblets, abdominal fat, breast muscle and thigh muscle; slaughter value and slaughter percentage), as well as blood samples for DNA extraction and SNP analysis, were obtained from 97 chickens belonging to two different lines (Hubbard F15 and Cobb E) equally divided between the two sexes. The genotypes were detected using polymerase chain reaction- restriction fragment length polymorphism (PCR-RFLP) methods with specific primers and restrictase for each gene. The statistical analysis discovered significant associations (p < 0.05) between the TGFβ3 SNP and the following parameters: BW at 21, 28 and 35 days, trunk weight and slaughter value. Association analysis of BWs (at 21, 28 and 35 days) and SNPs was always significant for codominant, dominant and overdominant genetic models, showing a possible path for genomic selection in these chicken lines. Slaughter value was significant for codominant, recessive and overdominant patterns, whereas other carcass traits were not influenced by SNPs. Based on the results of this study, we suggested that the TGFβ3 gene could be used as a candidate gene marker for chicken growth traits in the Hubbard F15 and Cobb E population selection programs, whereas for carcass traits further investigation is needed.

scholarly journals Effect of corn processing on growth performance, carcass characteristics, and plasma glucose-dependent insulinotropic polypeptide and metabolite concentrations in feedlot cattle1

2020 ◽  
Vol 4 (2) ◽  
pp. 822-830 ◽  
Author(s):  
Tiago B Freitas ◽  
Tara L Felix ◽  
Wayne Shriver ◽  
Francis L Fluharty ◽  
Alejandro E Relling
Keyword(s):  
Growth Performance ◽  
Random Effects ◽  
Plasma Glucose ◽  
Fixed Effects ◽  
Block Design ◽  
Average Daily Gain ◽  
Carcass Characteristics ◽  
Fat Deposition ◽  
Metabolite Concentrations ◽  
Corn Processing

Abstract The objectives of this trial were to evaluate the association between corn processing, glucose-dependent insulinotropic polypeptide (GIP) concentration, and intramuscular (IM) fat deposition. We hypothesized that steers fed whole shelled corn (WSC) would have a greater IM fat deposition than steers fed cracked corn (CC) due to an increase in plasma GIP concentration. Backgrounded, Angus-cross cattle (initial body weight [BW] = 279 ± 9.8 kg) were used in a randomized complete block design in a feedlot setting for an average of 230 d. Cattle were allotted in 12 pens (6 pens per treatment with 8 animals per pen). There were three blocks: heifers (n = 32, initial BW = 265 ± 1.3 kg), small steers (n = 32, initial BW = 262 ± 1.3 kg), and large steers (n = 32, initial BW = 310 ± 1.4 kg). Two pens within each block were randomly assigned to one of the following treatments: 1) CC or 2) WSC. Animal growth performance, carcass characteristics, and plasma hormone and metabolite concentrations were analyzed using the MIXED procedure of SAS, including the fixed effects of treatment, or treatment, time, and their interaction. Pen and block were included as random effects. Carcass yield and quality grade distributions were compared using the GLIMMIX procedure of SAS. including the fixed effects of treatment and time with pen and block as random effects. Linear regression was used to evaluate the association of plasma GIP concentration and IM fat content. Average daily gain (P = 0.57) and final BW (P = 0.34) were similar, regardless of treatment. Cattle fed CC had reduced (P &lt; 0.01) dry matter intake (DMI) when compared with those fed WSC. This lesser DMI resulted in improved gain:feed ratio (P &lt; 0.01) for cattle fed CC compared with cattle fed WSC. There was no effect (P ≤ 0.33) of corn processing on plasma glucose, plasma GIP concentrations, hot carcass weight, dressing percentage, or marbling score. There was a positive linear relationship (P = 0.03) between IM fat concentration and plasma GIP concentration. In conclusion, feeding CC increased gain:feed ratio compared with WSC, but there was no difference in plasma GIP concentration, whereas plasma GIP concentration appears to be related to IM fat deposition.

Effects of low protein diets on growth performance, carcass traits and ammonia emission of barrows and gilts

2013 ◽  
Vol 53 (2) ◽  
pp. 146 ◽  
Author(s):  
J. Madrid ◽  
S. Martínez ◽  
C. López ◽  
J. Orengo ◽  
M. J. López ◽  
...  
Keyword(s):  
Growth Performance ◽  
Control Diet ◽  
Average Daily Gain ◽  
Carcass Traits ◽  
Backfat Thickness ◽  
Ammonia Emission ◽  
Growing Period ◽  
Low Protein ◽  
Pig Performance ◽  
Protein Diets

The aim of the present research was to determine the effect of low protein diets on growth performance, carcass traits and ammonia emission from barrows and gilts during the growing and finishing periods. For each period, three diets were formulated. A control diet (C) with 160 and 155 g crude protein (CP)/kg for the growing and finishing, respectively, a medium level diet (M) and a low level diet (L) with 10 and 20 g CP/kg less than the C, respectively. All the diets were supplemented with crystalline amino acids on an ideal protein basis. Barrows (90) and gilts (90) were sorted by bodyweight and sex and housed in three identical manually ventilated chambers. No significant effects of diet on pig performance were observed. In the finishing period, barrows were heavier (P < 0.001) and had higher average daily gain (P < 0.01) and average daily feed intake (P < 0.01) than gilts. Pigs fed the L diet had higher backfat thickness than those fed the other diets in the growing period (P < 0.05). Backfat thickness was higher (P < 0.01) in barrows than in gilts. Muscle depth decreased in pigs fed the L diet in the finishing period. Muscle depth was not affected (P > 0.05) by sex. Average ammonia emissions during the last 6 days were 117.7, 94.2 and 85.5 mg ammonia/kg pig.day for pigs fed the C, M and L diets, respectively. The results show that a reduction in dietary CP of 10 g/kg, accompanied by supplementation with crystalline amino acid reduced ammonia emission by 19.9% with no detrimental effects on growth performance and carcass characteristics, and a reduction of 20 g/kg reduced ammonia emission by 27.3% with no detrimental effects on growth performance but reduced muscle depth at slaughter.

THE EFFECT OF INBREEDING ON PREWEANING GROWTH OF YANKASA SHEEP

2021 ◽  
Vol 26 ◽  
pp. 6-10
Author(s):  
E. M. Awemu ◽  
B. Y. Abubakar ◽  
L. N. Nwakalor
Keyword(s):  
Birth Weight ◽  
Growth Traits ◽  
Average Daily Gain ◽  
Regression Coefficients ◽  
Breeding Period ◽  
Weaning Weight ◽  
Inbreeding Coefficients ◽  
Using Data ◽  
Inbreeding Level ◽  
Daily Gain

The accumulated and annual levels of inbreeding and their effects on growth traits of lambs were investigated using data collected over 11 years at the National Animal Production Research Institute Zaria. Inbreeding level averaged 1.313% per year, cumulating to 14.45% over the years. Average individuals inbreeding coefficients of offspring from sires used for more than one breeding period was 0.103% across the inbred individuals and 0.004% over all lambs. Regression coefficients of growth traits (everage values per year) on inbreeding levels by year were – 0.185kg ± 1.820g and -0.391kg for birth weight, preweaning average daily gain and weaning weight, respectively. All regression coefficients indicated that birth weight and weaning weight declined by 0.185kg and 0.391kg, respectively while preweaning average daily gain increased by 1.820g. Conscious efforts to reduce inbreeding level and its effects on growth traits will greatly lead to improved productivity

scholarly journals A DdeI PCR-RFLP detecting a novel missense mutation of the POU1F1 gene showed no effects on growth traits in cattle

2008 ◽  
Vol 53 (No. 12) ◽  
pp. 532-527 ◽  
Author(s):  
C.Y. Pan ◽  
X.Y. Lan ◽  
H. Chen ◽  
D.Y. Yang ◽  
L.S. Hua ◽  
...  
Keyword(s):  
Fixed Effects ◽  
Growth Traits ◽  
Average Daily Gain ◽  
Protein A ◽  
Body Height ◽  
Significant Relationships ◽  
Chinese Cattle ◽  
Pcr Rflp ◽  
Body Sizes ◽  
Daily Gain

In this study, a novel missense (NM_174579:c.1201C>T) mutation in exon 6 at the bovine <I>POU1F1</I> locus is reported, which results in p.S284F, namely, Ser (TCT) > Phe (TTT) at position 284 of the mature protein. A <I>Dde</I>I PCR-RFLP was used to determine the genotypes. The polymorphism was studied in eight Chinese cattle breeds (Nanyang, <I>n</I> = 251; Qinchuan, 149; Jiaxian Red, 144; Chinese Holstein, 61; Luxi, 57; Angus, 49; Jinnan, 60; Guyuan, 192). The frequencies of the <I>POU1F1 T</I> allele in the analyzed populations ranged from 0.010 to 0.053. The relationships between the <I>Dde</I>I polymorphism and growth traits and body sizes were analyzed by adjusted linear model in 251 Nanyang cattle. Fixed effects of marker genotype, birth year, season of birth (spring vs. fall), age of dam, sire, farm and sex, and random effects of an animal were included. Statistical evaluation revealed no significant relationships between this polymorphism and birth weight, body weight and average daily gain for different growth periods (6-month old, 12-month old, 18-month old and 24-month old) body height, body length, heart girth and height at the hip cross for different growth periods (<I>P</I> > 0.05).

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