Estimation of Genetic Associations between Production and Meat Quality Traits in Duroc Pigs

M.M. Cabling,H.S. Kang,B.M. Lopez,M. Jang,H.S. Kim,남기창,J.G. Choi,서강석 아세아·태평양축산학회 2015 Animal Bioscience Vol.28 No.8

Data collected from 690 purebred Duroc pigs from 2009 to 2012 were used to estimate the heritability, and genetic and phenotypic correlations between production and meat quality traits. Variance components were obtained through the restricted maximum likelihood procedure using Wombat and SAS version 9.0. Animals were raised under the same management in five different breeding farms. The average daily gain, loin muscle area (LMA), backfat thickness (BF), and lean percent (LP) were measured as production traits. Meat quality traits included pH, cooking loss, lightness (L*), redness (a*), yellowness (b*), marbling score (MS), moisture content (MC), water holding capacity (WHC), and shear force. The results showed that the heritability estimates for meat quality traits varied largely from 0.19 to 0.79. Production traits were moderate to highly heritable from 0.41 to 0.73. Genotypically, the BF was positively correlated (p<0.05) with MC (0.786), WHC (0.904), and pH (0.328) but negatively correlated with shear force (‒0.533). The results of genetic correlations indicated that selection for less BF could decrease pH, moisture content, and WHC and increase the shear force of meat. Additionally, a significant positive correlation was recorded between average daily gain and WHC, which indicates pork from faster-growing animals has higher WHC. Furthermore, selection for larger LMA and LP could increase MS and lightness color of meat. The meat quality and production traits could be improved simultaneously if desired. Hence, to avoid further deterioration of pork characteristics, appropriate selection of traits should be considered.

Estimation of Genetic Parameters for Pork Belly Components in Yorkshire Pigs

Kang, H.S.,Lopez, B.M.,Kim, T.H.,Kim, H.S.,Kim, S.H.,Nam, K.C.,Seo, K.S. Asian Australasian Association of Animal Productio 2015 Animal Bioscience Vol.28 No.7

This study was conducted to estimate the genetic parameters for pork belly traits and muscles in Yorkshire pigs. Each pork belly was cut into nine parts perpendicular to the thoracic vertebrae (6th to 14th). Traits of belly muscles including the deep pectoral, latissimus dorsi, cutaneous trunci, rectus abdominis, external and internal abdominal oblique from 382 purebred pigs were recorded and analyzed using SAS Package (9.1) and Derivative-free restricted maximum likelihood methods. Heritability estimates for belly traits ranged from 0.27 to 0.49, while they were 0.12 to 0.66 for belly muscles. Moderate to high heritability estimates were noted in belly weight (0.33), belly length (0.28), and belly width (0.49). In belly muscles, the latissimus dorsi and deep pectoral, which are located only in the 6th to 9th vertebrae sections, were found to have heritability estimates ranging from 0.21 to 0.29 and 0.23 to 0.35, respectively. Strong heritability estimates were observed in the 7th to 13th sections of cutaneous trunci muscle ranging from 0.42 to 0.66. Genetic correlations of latissimus dorsi m. with belly length were positive (0.50), while cutaneous trunci m. with belly weight also revealed a positive relationship that ranged from 0.35 to 0.47. The estimated genetic parameters indicate that belly weight can be improved by genetic selection. Differences in the levels of heritability occurred among various parameters of Yorkshire pork belly, which should be considered when performing selection to improve pork belly quality. Moreover, these results can provide valuable information that can be used as the basis for further investigations to improve pork belly.

Estimation of Genetic Parameters for Pork Belly Components in Yorkshire Pigs

H.S. Kang,B.M. Lopez,T.H. Kim,H.S. Kim,S.H. Kim,남기창,서강석 아세아·태평양축산학회 2015 Animal Bioscience Vol.28 No.7

This study was conducted to estimate the genetic parameters for pork belly traits and muscles in Yorkshire pigs. Each pork belly was cut into nine parts perpendicular to the thoracic vertebrae (6th to 14th). Traits of belly muscles including the deep pectoral, latissimus dorsi, cutaneous trunci, rectus abdominis, external and internal abdominal oblique from 382 purebred pigs were recorded and analyzed using SAS Package (9.1) and Derivative-free restricted maximum likelihood methods. Heritability estimates for belly traits ranged from 0.27 to 0.49, while they were 0.12 to 0.66 for belly muscles. Moderate to high heritability estimates were noted in belly weight (0.33), belly length (0.28), and belly width (0.49). In belly muscles, the latissimus dorsi and deep pectoral, which are located only in the 6th to 9th vertebrae sections, were found to have heritability estimates ranging from 0.21 to 0.29 and 0.23 to 0.35, respectively. Strong heritability estimates were observed in the 7th to 13th sections of cutaneous trunci muscle ranging from 0.42 to 0.66. Genetic correlations of latissimus dorsi m. with belly length were positive (0.50), while cutaneous trunci m. with belly weight also revealed a positive relationship that ranged from 0.35 to 0.47. The estimated genetic parameters indicate that belly weight can be improved by genetic selection. Differences in the levels of heritability occurred among various parameters of Yorkshire pork belly, which should be considered when performing selection to improve pork belly quality. Moreover, these results can provide valuable information that can be used as the basis for further investigations to improve pork belly.

Optimization of Swine Breeding Programs Using Genomic Selection with ZPLAN+

Lopez, B.M.,Kang, H.S.,Kim, T.H.,Viterbo, V.S.,Kim, H.S.,Na, C.S.,Seo, K.S. Asian Australasian Association of Animal Productio 2016 Animal Bioscience Vol.29 No.5

The objective of this study was to evaluate the present conventional selection program of a swine nucleus farm and compare it with a new selection strategy employing genomic enhanced breeding value (GEBV) as the selection criteria. The ZPLAN+ software was employed to calculate and compare the genetic gain, total cost, return and profit of each selection strategy. The first strategy reflected the current conventional breeding program, which was a progeny test system (CS). The second strategy was a selection scheme based strictly on genomic information (GS1). The third scenario was the same as GS1, but the selection by GEBV was further supplemented by the performance test (GS2). The last scenario was a mixture of genomic information and progeny tests (GS3). The results showed that the accuracy of the selection index of young boars of GS1 was 26% higher than that of CS. On the other hand, both GS2 and GS3 gave 31% higher accuracy than CS for young boars. The annual monetary genetic gain of GS1, GS2 and GS3 was 10%, 12%, and 11% higher, respectively, than that of CS. As expected, the discounted costs of genomic selection strategies were higher than those of CS. The costs of GS1, GS2 and GS3 were 35%, 73%, and 89% higher than those of CS, respectively, assuming a genotyping cost of $120. As a result, the discounted profit per animal of GS1 and GS2 was 8% and 2% higher, respectively, than that of CS while GS3 was 6% lower. Comparison among genomic breeding scenarios revealed that GS1 was more profitable than GS2 and GS3. The genomic selection schemes, especially GS1 and GS2, were clearly superior to the conventional scheme in terms of monetary genetic gain and profit.

Degree of connectedness among herds of three pig breeds in Korea

Lopez, B. M.,Kang, H. S.,Viterbo, V. S.,Song, C. W.,Seo, K. S. INDIAN COUNCIL OF AGRICULTURAL RESEARCH 2018 The Indian journal of animal sciences Vol.88 No.6

Group quenching and galactic conformity at low redshift

Treyer, M,Kraljic, K,Arnouts, S,de la Torre, S,Pichon, C,Dubois, Y,Vibert, D,Milliard, B,Laigle, C,Seibert, M,Brown, M J I,Grootes, M W,Wright, A H,Liske, J,Lara-Lopez, M A,Bland-Hawthorn, J Oxford University Press 2018 MONTHLY NOTICES- ROYAL ASTRONOMICAL SOCIETY Vol.477 No.2

MTERF1 Binds mtDNA to Prevent Transcriptional Interference at the Light-Strand Promoter but Is Dispensable for rRNA Gene Transcription Regulation

Terzioglu, M.,Ruzzenente, B.,Harmel, J.,Mourier, A.,Jemt, E.,Lopez, M.,Kukat, C.,Stewart, James B.,Wibom, R.,Meharg, C.,Habermann, B.,Falkenberg, M.,Gustafsson, Claes M.,Park, C.,Larsson, N.G. Cell Press 2013 Cell metabolism Vol.17 No.4

Mitochondrial transcription termination factor 1, MTERF1, has been reported to couple rRNA gene transcription initiation with termination and is therefore thought to be a key regulator of mammalian mitochondrial ribosome biogenesis. The prevailing model is based on a series of observations published over the last two decades, but no in vivo evidence exists to show that MTERF1 regulates transcription of the heavy-strand region of mtDNA containing the rRNA genes. Here, we demonstrate that knockout of Mterf1 in mice has no effect on mitochondrial rRNA levels or mitochondrial translation. Instead, loss of Mterf1 influences transcription initiation at the light-strand promoter, resulting in a decrease of de novo transcription manifested as reduced 7S RNA levels. Based on these observations, we suggest that MTERF1 does not regulate heavy-strand transcription, but rather acts to block transcription on the opposite strand of mtDNA to prevent transcription interference at the light-strand promoter.

Measurement of theB+→ωl+νandB+→ηl+νbranching fractions

Aubert, B.,Bona, M.,Karyotakis, Y.,Lees, J. P.,Poireau, V.,Prencipe, E.,Prudent, X.,Tisserand, V.,Garra Tico, J.,Grauges, E.,Lopez, L.,Palano, A.,Pappagallo, M.,Eigen, G.,Stugu, B.,Sun, L.,Abrams, G. American Physical Society 2009 PHYSICAL REVIEW D - Vol.79 No.5

Estimation of Genetic Associations between Production and Meat Quality Traits in Duroc Pigs

Cabling, M.M.,Kang, H.S.,Lopez, B.M.,Jang, M.,Kim, H.S.,Nam, K.C.,Choi, J.G.,Seo, K.S. Asian Australasian Association of Animal Productio 2015 Animal Bioscience Vol.28 No.8

Data collected from 690 purebred Duroc pigs from 2009 to 2012 were used to estimate the heritability, and genetic and phenotypic correlations between production and meat quality traits. Variance components were obtained through the restricted maximum likelihood procedure using Wombat and SAS version 9.0. Animals were raised under the same management in five different breeding farms. The average daily gain, loin muscle area (LMA), backfat thickness (BF), and lean percent (LP) were measured as production traits. Meat quality traits included pH, cooking loss, lightness ($L^*$), redness ($a^*$), yellowness ($b^*$), marbling score (MS), moisture content (MC), water holding capacity (WHC), and shear force. The results showed that the heritability estimates for meat quality traits varied largely from 0.19 to 0.79. Production traits were moderate to highly heritable from 0.41 to 0.73. Genotypically, the BF was positively correlated (p<0.05) with MC (0.786), WHC (0.904), and pH (0.328) but negatively correlated with shear force (-0.533). The results of genetic correlations indicated that selection for less BF could decrease pH, moisture content, and WHC and increase the shear force of meat. Additionally, a significant positive correlation was recorded between average daily gain and WHC, which indicates pork from faster-growing animals has higher WHC. Furthermore, selection for larger LMA and LP could increase MS and lightness color of meat. The meat quality and production traits could be improved simultaneously if desired. Hence, to avoid further deterioration of pork characteristics, appropriate selection of traits should be considered.

Effect of Serve Execution on Serve Efficacy in Men`s and Women`s Beach Volleyball

( A. B. Lopez Martinez ),( J. M. Palao ) 한국스포츠정책과학원(구 한국스포츠개발원) 2009 International Journal of Applied Sports Sciences Vol.21 No.1

The purpose of this study was to assess the effect of serve technique and its manner of execution on the efficacy of the serve in beach volleyball according to gender. A total of 1073 serves from 25 sets of the 2003 World Championship and the 2004 Olympic Games were analyzed (508 serves from men`s games and 576 serves from women`s games). The variables studied were: type of serve (standing serve or jump serve), manner of execution (origin, destination, and distance), serve efficacy, result of the action, and gender. Descriptive and inferential analyses of the data were done (chi-square test and likelihood ratio) with a level of statistical significance set at p<0.05. The results show that for both genders: a) the jump serve involved a higher number of errors, points, and actions that limited the opponent; b) the jump serve and standing serve involved similar levels of efficacy; c) the serve directed toward the interference zone between receivers was the most effective; d) players used the jump serve and the standing serve; and e) no relationship was found between type of serve and result of the rally.