scholarly journals Effect of the oestrogen receptor (ESR) gene on reproductive traits of Large White, White Meaty and Landrace pigs

2011 ◽  
Vol 50 (No. 6) ◽  
pp. 249-253 ◽  
Author(s):  
R. Omelka ◽  
M. Bauerová ◽  
J. Mlynek ◽  
B. Buchová ◽  
D. Peškovičová ◽  
...  
Keyword(s):  
Oestrogen Receptor ◽  
Reproductive Traits ◽  
Positive Association ◽  
Large White ◽  
Pcr Rflp ◽  
Negative Effect ◽  
Breeding Farms ◽  
Esr Gene

We investigated the effect of oestrogen receptor (ESR) gene on total number of born (TNB), number of born alive (NBA) and number of weaned (NW) piglets in Large White (LW), White Meaty (WM) and Landrace (L) sows from six Slovak breeding farms. Detection of ESR (Pvu II) genotypes was performed by the PCR-RFLP method. The frequencies of favourable B allele in LW, WM and L were 0.33, 0.25 and 0.08, respectively. We found a highly significant effect of ESR locus on NW (P ≤ 0.01) in LW, however, we observed a negative effect of BB genotype on the trait. In WM, a positive association of B allele with TNB, NBA and NW was found but the differences were not confirmed statistically. A highly significant effect of ESR locus on TNB, NBA and NW (P ≤ 0.01) was identified only in L breed. We found an increase of +0.62 ± 0.18 (TNB), +0.65 ± 0.18 (NBA) and +0.51 ± 0.16 (NW) pigs per copy of B allele.  

scholarly journals Effect of the estrogen receptor (<i>ESR</i>) and ryanodine receptor (<i>RYR1</i>) genes on reproductive traits of Slovak Large White, White Meaty and Landrace pigs (short communication)

2006 ◽  
Vol 49 (4) ◽  
pp. 357-362
Author(s):  
R. Omelka ◽  
D. Peškovičová ◽  
M. Martiniaková ◽  
M. Bauer ◽  
M. Bauerová
Keyword(s):  
Estrogen Receptor ◽  
Ryanodine Receptor ◽  
Short Communication ◽  
Reproductive Traits ◽  
Large White ◽  
Ryr1 Gene ◽  
Negative Effect ◽  
Breeding Farms

Abstract. We investigated the effect of the estrogen receptor (ESR) and ryanodine receptor (RYR1) genes on total number of born (TNB), number of born alive (NBA) and number of weaned (NW) piglets in Large White (LW), White Meaty (WM) and Landrace (L) sows from six Slovak breeding farms. We found a significant effect of ESR locus on NW (P≤0.01) in LW, however, we observed a negative effect of BB genotype on the trait. In WM, positive associations of B allele with TNB, NBA, NW were found but the differences were not confirmed statistically. A highly significant effect (P≤0.01) of ESR locus on TNB (+0.62±0.18 pigs per copy of B allele), NBA (+0.65±0.18) and NW (+0.51±0.16) was identified in L breed. With RYR1 gene we found significantly higher TNB and NBA in heterozygous WM sows (+1.01±0.36 in TNB; +0.87±0.32 in NBA; P≤0.01). NBA was also significant in LW (+0.41±0.19; P≤0.05).

scholarly journals Association of non-synonymous SNPs of <i>OPN</i> gene with litter size traits in pigs

2015 ◽  
Vol 58 (2) ◽  
pp. 317-323 ◽  
Author(s):  
T. Kumchoo ◽  
S. Mekchay
Keyword(s):  
Litter Size ◽  
Reproductive Traits ◽  
Snp Markers ◽  
Strong Linkage Disequilibrium ◽  
Nucleotide Polymorphisms ◽  
Large White ◽  
Single Nucleotide ◽  
Pcr Rflp ◽  
Polymerase Chain ◽  
Acid Exchange

Abstract. Osteopontin (OPN) gene is a secreted phosphoprotein which appears to play a key function in the conceptus implantation, placentation and maintenance of pregnancy in pigs. The objectives of this study were to verify the non-synonymous single nucleotide polymorphisms (SNPs) and their association with litter size traits in commercial Thai Large White pigs. A total of 320 Thai Large White sows were genotyped using the polymerase chain reaction-restriction fragment length polymorphism (PCR-RFLP) method. Three SNPs at c.425G> A, c.573T> C and c.881C> T revealed amino acid exchange rates of p.110Ala> Thr, p.159Val> Ala and p.262Pro> Ser, respectively, and were then segregated. These three SNPs were significantly associated with total number born (TNB) and number born alive (NBA) traits. No polymorphisms of the two SNP markers (c.278A> G and c.452T> G) were observed in this study. Moreover, the SNPs at c.425G> A and c.573T> C were found to be in strong linkage disequilibrium. The association of OPN with litter size emphasizes the importance of porcine OPN as a candidate gene for reproductive traits in pig breeding.

scholarly journals Analysis of prolificacy in sows of hyperprolific lines of Large White breed

2011 ◽  
Vol 50 (No. 4) ◽  
pp. 155-162
Author(s):  
V. Matoušek ◽  
A. Čermáková ◽  
N. Kernerová ◽  
P. Králová
Keyword(s):  
Candidate Genes ◽  
Reproductive Performance ◽  
Reproductive Traits ◽  
Breeding Value ◽  
Large White ◽  
Large White Breed ◽  
Lifetime Performance ◽  
White Breed ◽  
Positive Effect ◽  
Esr Gene

The objective of the paper was to evaluate the results of reproductive performance of sows in some elite breeding herds of the Large White breed included in experimental herds for the production of hyperprolific lines of dam breeds. The set consisted of 98 sows with the known genotypes of ESR, FSH&acirc; and PRLR genes. The dendrogram shows that on the basis of their genetic outfit the sows can be divided into two clusters. The first cluster can be described as a cluster with marked dominance of HPL sows and the second cluster with marked dominance of the sows of basic herd. The first cluster consisted of individuals in which the preferred genotype AA of PRLR gene was not detected. As for FSH&acirc; gene, the beneficial genotype BB was found out in 74.10% of sows. In ESR gene the beneficial genotype DD was recorded only in 11.10% of individuals. On average for the lifetime performance they delivered by 2.08 piglets more in all born piglets and by 1.96 piglets more in live-born piglets per litter. Differences in the reproductive traits between HPL sows and the sows of basic herd in the first cluster were statistically highly significant. On the contrary, genotype AA of PRLR gene was identified in all sows of the second cluster, 61.36% of animals possessed beneficial genotype BB of FSH&acirc; gene. As for ESR gene, beneficial genotype DD was identified within the whole cluster in 31.82% of sows. In lifetime performance the HPL sows had on average by 1.10 individuals more in all born piglets and by 1.01 more in live-born piglets (statistically significantly higher values). The unambiguous expression of a positive effect of preferred genotypes of selected candidate genes failed to be confirmed by the results of statistical analyses testing the associations of candidate genes for pig reproduction with selected parameters of breeding value and prolificacy of sows. &nbsp;

scholarly journals Effects of BF Gene Polymorphism on the Reproductive Performance of Hybrid Polish Landrace X Polish Large White Sows

2016 ◽  
Vol 66 (1) ◽  
pp. 125-131
Author(s):  
Dorota Napierała ◽  
Maria Kawęcka ◽  
Eugenia Jacyno ◽  
Beata Matysiak ◽  
Anita Kołodziej-Skalska
Keyword(s):  
Gene Polymorphism ◽  
Litter Size ◽  
Reproductive Performance ◽  
Reproductive Traits ◽  
Specific Primers ◽  
Large White ◽  
Potential Relationship ◽  
Pcr Rflp

AbstractThe aim of this study was to determine the potential relationship between variants of the BF gene and litter size in Polish Landrace x Polish Large White sows. To identify polymorphism within the BF gene, the PCR-RFLP method was applied, using specific primers and the SmaI enzyme. The researchers identified the presence of two alleles, T and C, with frequencies: 0.68 and 0.32, giving three genotypes with frequencies: 0.49, 0.37 and 0.14, respectively for TT, TC and CC. Analysis of relationships between the various genotypes of the BF gene and selected reproductive traits showed significant differences. Sows with TT genotype in the BF locus, gave birth to significantly more live piglets in the first litter (10.24) compared with sows with the CC genotype (7.13).

Evaluation of performance traits in European Meishan pig crosses with varying Oestrogen Receptor (ESR) genotypes

1997 ◽  
Vol 1997 ◽  
pp. 28-28
Author(s):  
O.I. Southwood ◽  
H.A.M. van der Steen
Keyword(s):  
Litter Size ◽  
Significant Relationship ◽  
Oestrogen Receptor ◽  
Large White ◽  
Positive Allele ◽  
Evaluation Of Performance ◽  
Performance Traits ◽  
And Performance ◽  
Meishan Pig ◽  
Esr Gene

A significant relationship between the ESR gene and litter size has been reported for a range of Meishan synthetic and Large White lines (Rothschild et al., 1995). The effect of one copy of the positive (B) allele in a European 50% Chinese Meishan synthetic (L93) was estimated as +0.79 pigs born alive per litter in the first parity (Southwood et al, 1995). It is therefore of interest to incorporate the positive allele into a comercial parent gilt, the growing performance and soundness of these animals also being of importance. The objective of this trial was to evaluate the effect of the ESR gene on growth and performance traits in a commercial type background.

scholarly journals Association and polymorphism study of seven candidate genes with reproductive traits in three pig breeds in Hungary.

2016 ◽  
Vol 63 (2) ◽  
Author(s):  
Ágnes Hunyadi-Bagi ◽  
Péter Balogh ◽  
Krisztina Nagy ◽  
Szilvia Kusza
Keyword(s):  
Growth Rate ◽  
Association Study ◽  
Significant Influence ◽  
Reproductive Traits ◽  
Large White ◽  
Pig Breeds ◽  
Pcr Rflp ◽  
Reproduction Traits ◽  
Hardy Weinberg Equilibrium ◽  
Selection For

Seven genes (BF, EGF, ESR, FSHB, H2AFZ, LEP and PRLP) were studied as candidate gene influencing eleven reproduction traits (interval between litters (IBL), percent of litter (PL), number of litters (NL), number of piglets born dead (NBD), number of piglet born alive (NBA), total number born (TNB), mean of born alive (MBA), mean of born dead (MBD), mean of born total (MBT), mean of piglets at 21 days of age (M21D) and growth rate (GR) in three pig breeds (Hungarian Large White (HLW), Duroc and Pietrain) by PCR-RFLP. Based on the observed vs. expected genotypes frequencies populations across loci were in Hardy-Weinberg equilibrium (P>0.05). In case HLW breed ESR and FSHβ genes were in disequilibrium. Association study suggested that only EGF gene showed significant influence on the trait NBA and TNB. The AA genotype are preferable for sows, associated with higher NBA and TNB. The longest IBL, and the highest NL is associated with AB and AA genotype of EGF gene. IBL is significantly shorter in case of pigs with AB and AA alleles than BB alleles of PRLP genes. Selection for these SNPs could improve the reproductivity in the studied breeds.

scholarly journals Studies of management effects on fertility of purebred and crossbred exotic gilts in two breeding farms at NSUKKA, Nigeria

2021 ◽  
Vol 28 (1) ◽  
pp. 20-25
Author(s):  
F. M. AGBANGHA ◽  
F. U. EZEMA ◽  
B. C. O. OMEKE
Keyword(s):  
Reproductive Traits ◽  
Mortality Rates ◽  
Daily Weight Gain ◽  
Large White ◽  
Breeding Center ◽  
Management Techniques ◽  
Breeding Farms ◽  
The Tropics ◽  
Crossbred Pigs ◽  
Management Effects

Sixty healthy gilts comprising 15 Landrace (LR), Large White (LW} and LW x Hampshire (HS) breeds respectively, were selected from Federal Government (FG) breeding center at Okpuje near Nsukka and University of Nigeria Nsukka (UNN) farms. They were bred through 4 years (1993 to 1996) during which management effects on fertility were assessed. Gilts were mated on observation of third cyclic oestrus and at subsequent postweaning oestrus. Fertility was assessed from vital reproductive traits due to dams and offsprings. All gilts had successful first and second parity breeding. Thereafter there were increasing cases of abortion and anoestrus particularly among purebred groups in FG farms. Generally, 8 (53.3%), 6 (40.0%), 10 (66.7%) and 13 (86.7%) out of 15 dams in respective groups could attain fifth parity within four years. Both groups exhibited long breeding Intervals (ranging from 192-268 days). Purebred LW and LR offspring had slightly lower mean litter size of 8.5 ± 1.8 and 8.8 ± 1.5 compared with 9.5 ± 0.9 and 9.7 ± 1.4 (P<0.05) for LW x LR and LW x HS crossbred counterparts respectively, Birth and weaning weights and daily weight gain were similarly lower for purebred than crossbred offsprings. Attendant mortality rates of 13.1% and 15.7% for the former were significantly higher than 9.8% and 10.1% (<O.05) obtained for the latter offsprings respectively. The FG farm was more understocked, underutilized and undermanaged than the UNN farm probably because of inconsistencies arising from administrative bureaucracy. Consequently constraints are identified for improvement through efficient resources inputs, staff incentives and application of modern strategic management techniques recommended for tropical environment. Further research into stocking Hamphsire crossbred pigs in the tropics is suggested, in view of its favourable performance.

scholarly journals Association between ATP citrate lyase (ACLY) gene polymorphism and fattening, slaughter and pork quality traits in polish pigs

2021 ◽  
Vol 0 (0) ◽  
Author(s):  
Arkadiusz Terman ◽  
Katarzyna Woźniak-Męch ◽  
Agnieszka Korpal ◽  
Daniel Polasik ◽  
Mirosław Tyra ◽  
...  
Keyword(s):  
Gene Polymorphism ◽  
Average Daily Gain ◽  
Pork Quality ◽  
Quality Traits ◽  
Atp Citrate Lyase ◽  
Large White ◽  
Citrate Lyase ◽  
Texture Parameters ◽  
Pcr Rflp ◽  
Negative Effect

Abstract The primary aim of this study was to estimate the relationship between ATP citrate lyase (ACLY) gene polymorphism (c.*523 T>C) and fattening and pork quality traits. Investigations were carried out on 526 pigs represented by three breeds: Polish Landrace (n=269), Polish Large White (n=189) and Puławska (n=68). ACLY genotypes were determined by PCR–RFLP method. It was demonstrated that the analyzed polymorphism had significant influence (p< 0.05 and p ≤ 0.01) on several economically important traits in pigs e.g. average daily gain, average backfat thickness, lean meat percentage. The results obtained allow for application of c.*523 T>C polymorphism in breeding programs to improve the pig population in terms of fattening and slaughter traits. However, this breeding program may have a slight negative effect on meat texture parameters.

scholarly journals The oestrogen receptor gene (ESR) PvuII polymorphism allele frequencies in Czech Large White and Landrace

2005 ◽  
Vol 53 (2) ◽  
pp. 33-38
Author(s):  
Eliška Goliášová ◽  
Josef Dvořák
Keyword(s):  
Oestrogen Receptor ◽  
Receptor Gene ◽  
Allele Frequencies ◽  
Large White ◽  
Genotype Frequencies ◽  
Pcr Rflp ◽  
Hardy Weinberg Equilibrium ◽  
Pvuii Polymorphism ◽  
Landrace Population ◽  
Genotype And Allele Frequencies

Genotype and allele frequencies of the oestrogen receptor gene (ESR) PvuII restriction site were investigated in populations of the main Czech maternal breeds. 1253 sows and gilts and 396 boars in Large White and 334 sows and gilts and 318 boars in Landrace were genotyped from blood samples by the modified PCR-RFLP procedure as described in Short et al. (1997). In Large White, the frequency of allele B was about 0.51. In Landrace, the frequency of allele B reached from 0.02 for boars to 0.03 for sows. No significant deviations of the observed genotype frequencies from the frequencies expected according to Hardy-Weinberg equilibrium were found in both breed. Opposite trends in allele frequencies development could be assumed for analysed sows and boars of both breeds. In Large White sows the frequency of allele B raised probably due prefering sows with BB genotype, whereas in Landrace population the frequency of allele B decreased from yet unknown reasons.

scholarly journals Role of genetic markers in the prediction of classification of Czech Large White gilts to a hyperprolific line

2009 ◽  
Vol 52 (1) ◽  
pp. 40-50
Author(s):  
N. Kernerová ◽  
V. Matoušek ◽  
A. Čermáková ◽  
M. Forbelská
Keyword(s):  
Posterior Probability ◽  
Statistical Evaluation ◽  
Reproductive Traits ◽  
Dominant Effect ◽  
Large White ◽  
Genetic Endowment ◽  
Different Populations ◽  
Esr Gene

Abstract. The objective of statistical evaluation (discriminant analysis) was to find out whether the genetic endowment the gilt was born with is a high-quality discriminator for prediction of its future classification to a hyperprolific line (HPL). Based on the results a conclusion is drawn that the gilt with genotype CC of ESR gene will be classified to HPL in high probability – if the effect of this gene is not reduced by an interaction with other genes. The statistical analysis did not reveal a significant effect of FSHB gene in Czech Large White sows on their future classification to HPL. On the contrary, PRLR gene is a highquality discriminator. Obviously, it is highly probable that the gilt with genotype BB will be classified to HPL. It is to state from the analysis of pairs of the studied genes that the adult gilt with genotype CC of ESR gene and genotype BB of FSHB gene and/or PRLR gene will be classified to HPL in all probability. PRLR gene has a dominant effect in the pair ESR and PRLR. Genotype BB of PRLR gene (the most beneficial of the genotypes from the aspect of future classification of gilts to HPL) markedly increases posterior probability of alleles of ESR gene. If the classification of a gilt to HPL is predicted from the analysis of all three genes, the results of partial analyses are confirmed in most cases. The results of the experiment indicate a possible prediction of gilts on the basis of their genotype for classification to HPL but it cannot be confirmed that the identified »beneficial« genotype will always be expressed in different populations by an increase in reproductive traits.

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