Genetic approaches to the improvement of fertility traits in the pig

Spötter, A.; Distl, O.

doi:10.1016/j.tvjl.2005.11.013

Cited by 65 publications

(70 citation statements)

References 122 publications

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“…The impact of LIF genotypes being studied Spötter et al (2006) obtained the results in which the sows of the synthetic German line, despite the low frequency of the A allele, exhibited a positive effect of the recessive A allele on the number of born alive. The subsequent research of Spötter et al (2009) included two large populations of Large White and Landrace lines and showed that sows with AB genotype of both breeds have the highest number of born alive in the first litter, which is consistent with our results.…”

Section: Discussionmentioning

confidence: 99%

Leukemia Inhibitory Factor (<i>LIF</i>) Gene Polymorphism and its Impact on Reproductive Traits of Pigs

Леонова¹,

Getmantseva²,

Vasilenko³

et al. 2015

American Journal of Animal and Veterinary Sciences

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The purpose of this study was to determine the frequencies of alleles and genotypes of the Leukemia Inhibitory Factor (LIF) gene (ID: 399503) in Landrace, Large White and Duroc pigs in Russia and to evaluate the impact on productive traits of pigs. Polymorphism was genotyped using PCR-RFLP method. In the course of studies we observed a different distribution of allele and genotype frequencies of different breeds. In all breeds under study all three genotypes AA, AB, BB were determined. The results of this study suggest that the LIF gene promotes the reproductive traits of pigs. The AA genotype sows compared to BB genotype analogues have better Total Number of Born (TNB) and Number Born Alive (NBA) by 1.4 and 1.3 (p<0.01) in Landrace sows, 1.3 and 0.9 (p<0.05) in Large White and 2.0 and 3.3 (p<0.001) in Duroc, respectively. The AB genotype sows exhibit intermediate values, which testifies the concentration of a favorable A allele in the pig genotype of animals contributing to the fertility. Our research revealed a positive effect of A allele and AA genotype that indicates the possibility to use this polymorphism in improving reproduction traits of sows.

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Section: Discussionmentioning

confidence: 99%

Leukemia Inhibitory Factor (<i>LIF</i>) Gene Polymorphism and its Impact on Reproductive Traits of Pigs

Леонова¹,

Getmantseva²,

Vasilenko³

et al. 2015

American Journal of Animal and Veterinary Sciences

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“…A number of important relations between genotypes of some markers and the litter size have been reported (Rotschild et al 1996(Rotschild et al , 2000Linville et al 2001;Van Rens et al 2002). In the opinion of numerous researchers, selection aimed at the increase of litter size based on several markers is more effective (Spötter and Distl 2006).…”

Section: Discussionmentioning

confidence: 99%

Polymorphism of ESR, FSHß, RBP4, PRL, OPN genes and their influence on morphometric traits of gilt reproductive tract before sexual maturity

et al. 2013

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The aim of the study was to examine the effect of gene polymorphism on the development of the reproductive system in 100 Polish Large White and 100 Polish Landrace gilts. Gilts were slaughtered when they reached 100 kg, and their uterus weight and length, as well as the ovary weight and volume were evaluated. Differences between gilts of both breeds were observed in some traits of the reproductive system, such as the uterine weight without the broad ligament (P ≤ 0.05) and the uterine capacity (P ≤ 0.01). Polish Landrace gilts were characterized with higher uterine weight and higher uterine capacity; they were also younger at the time of slaughter (P ≤ 0.05). No BB homozygote relative to the oestrogen receptor gene was found in the examined populations of Polish Landrace gilts. Also, a very low number of gilts with the AA genotype relative to follicle stimulating hormone gene was observed in both populations. Polymorphism of the examined genes had an effect on numerous traits which define the size of particular uterine sections, and thus it influenced the development of potential fertility of gilts before they entered the reproductive cycle. Based on our results we can conclude that genetic determination of reproductive potential occurs already in prepubertal gilts. The results may be used for the prognosis of fertility potential in gilts.

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“…According to Spötter and Distl [1], the most important of these are the numbers of piglets born and weaned per litter. Markerassisted selection (MAS), employed in conjunction with traditional selection methods, could accelerate the rate of change in economically important traits [2].…”

Section: Introductionmentioning

confidence: 99%

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

et al. 2016

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The 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 specifi c primers and the SmaI enzyme. The researchers identifi ed 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 signifi cant differences. Sows with TT genotype in the BF locus, gave birth to signifi cantly more live piglets in the fi rst litter (10.24) compared with sows with the CC genotype (7.13).

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Genetic approaches to the improvement of fertility traits in the pig

Cited by 65 publications

References 122 publications

Leukemia Inhibitory Factor (<i>LIF</i>) Gene Polymorphism and its Impact on Reproductive Traits of Pigs

Leukemia Inhibitory Factor (<i>LIF</i>) Gene Polymorphism and its Impact on Reproductive Traits of Pigs

Polymorphism of ESR, FSHß, RBP4, PRL, OPN genes and their influence on morphometric traits of gilt reproductive tract before sexual maturity

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

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