Fine mapping of quantitative trait loci (QTL) from previous linkage studies was performed on pig chromosomes 1, 4, 7, 8, 17, and X which were known to harbor QTL. Traits were divided into: growth performance, carcass, internal organs, cut yields, and meat quality. Fifty families were used of a F2 population produced by crossing local Brazilian Piau boars with commercial sows. The linkage map consisted of 237 SNP and 37 microsatellite markers covering 866 centimorgans. QTL were identified by regression interval mapping using GridQTL. Individual marker effects were estimated by Bayesian LASSO regression using R. In total, 32 QTL affecting the evaluated traits were detected along the chromosomes studied. Seven of the QTL were known from previous studies using our F2 population, and 25 novel QTL resulted from the increased marker coverage. Six of the seven QTL that were significant at the 5% genome-wide level had SNPs within their confidence interval whose effects were among the 5% largest effects. The combined use of microsatellites along with SNP markers increased the saturation of the genome map and led to smaller confidence intervals of the QTL. The results showed that the tested models yield similar improvements in QTL mapping accuracy.
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http://dx.doi.org/10.1590/S1415-47572013000400009 | DOI Listing |
BMC Genomics
January 2025
Crop Institute, Jiangxi Academy of Agricultural Sciences, Nanchang, 330200, China.
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DIADE, Université de Montpellier, IRD, CIRAD, Montpellier, France.
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State Fruit Experiment Station, Missouri State University, Mountain Grove, Missouri, United States;
Powdery mildew, caused by the fungus , is one of the primary causes of grape yield loss across the globe. While numerous resistance loci have been identified in various grapevine species, the genetic determinants of susceptibility to remain largely unexplored. Understanding the genetics of susceptibility for pathogenesis is equally important for developing durable resistance grapevines against this pathogen.
View Article and Find Full Text PDFBMC Genomics
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Department of Agronomy, Horticulture, and Plant Science, South Dakota State University (SDSU), Brookings, SD, 57007, USA.
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View Article and Find Full Text PDFPLoS Pathog
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Department of Biology, Johns Hopkins University, Baltimore, Maryland, United States of America.
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