Single- and joint-population analyses of two experimental pig crosses to confirm quantitative trait loci on Sus scrofa chromosome 6 and leptin receptor effects on fatness and growth traits
The primary goal of this study was to detect and confirm QTL on SSC6 for growth and fatness traits in 2 experimental F2 intercrosses Iberian x Landrace (IB x LR) and Iberian x Meishan (IB x MS), which were used in this study for the first time in a QTL analysis related to productive traits. For this purpose, single- and joint-population analyses with single and bivariate trait models of both populations were performed. The presence of the SSC6 QTL for backfat thickness previously identified in the IB x LR cross was detected in this population with additional molecular information, but also was confirmed in the IB x MS cross. In addition, a QTL affecting BW was detected in both crosses in a similar position to the QTL detected for backfat thickness. This is the first study in which a QTL affecting BW is detected on SSC6 in the IB x LR cross, as well as in the IB x MS resource population. Furthermore, we analyzed a previously described nonsynonymous lept in receptor (LEPR) SNP located in exon 14 (c.2002C > T) for causality with respect to this QTL within both F 2 populations. Our results supported the previously reported association between LEPR alleles and backfat thickness in the IB x LR cross, and this association was also confirmed within the IB x MS cross. An association not reported before between LEPR alleles and BW was identified in both populations. © 2009 American Society of Animal Science. All rights reserved.
| Main Authors: | , , , , , |
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| Format: | journal article biblioteca |
| Language: | English |
| Published: |
Oxford University Press
2009
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| Subjects: | Backfat thickness, Body weight, Joint analysis, Leptin receptor, Pig, Polymorphism, |
| Online Access: | http://hdl.handle.net/20.500.12792/3053 http://hdl.handle.net/10261/294085 |
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| Summary: | The primary goal of this study was to detect and confirm QTL on SSC6 for growth and fatness traits in 2 experimental F2 intercrosses Iberian x Landrace (IB x LR) and Iberian x Meishan (IB x MS), which were used in this study for the first time in a QTL analysis related to productive traits. For this purpose, single- and joint-population analyses with single and bivariate trait models of both populations were performed. The presence of the SSC6 QTL for backfat thickness previously identified in the IB x LR cross was detected in this population with additional molecular information, but also was confirmed in the IB x MS cross. In addition, a QTL affecting BW was detected in both crosses in a similar position to the QTL detected for backfat thickness. This is the first study in which a QTL affecting BW is detected on SSC6 in the IB x LR cross, as well as in the IB x MS resource population. Furthermore, we analyzed a previously described nonsynonymous lept in receptor (LEPR) SNP located in exon 14 (c.2002C > T) for causality with respect to this QTL within both F 2 populations. Our results supported the previously reported association between LEPR alleles and backfat thickness in the IB x LR cross, and this association was also confirmed within the IB x MS cross. An association not reported before between LEPR alleles and BW was identified in both populations. © 2009 American Society of Animal Science. All rights reserved. |
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