02860naa a2200373 a 450000100080000000500110000800800410001902400350006010000220009524501070011726000090022430000090023352018170024265000100205965000340206965000100210365000110211365300230212465300180214765300080216565300080217365300360218170000190221770000250223670000170226170000210227870000160229970000250231570000170234070000190235770000170237670000250239377300680241820840572018-01-03       2017    bl uuuu     u00u1 u    #d7 a10.1186/s40104-017-0187-z2DOI1 aBARROSO, L. M. A.  aRegularized quantile regression for SNP marker estimation of pig growth curves.h[electronic resource]  c2017  a9 p.  aBackground: Genomic growth curves are generally defined only in terms of population mean; an alternative approach that has not yet been exploited in genomic analyses of growth curves is the Quantile Regression (QR). This methodology allows for the estimation of marker effects at different levels of the variable of interest. We aimed to propose and evaluate a regularized quantile regression for SNP marker effect estimation of pig growth curves, as well as to identify the chromosome regions of the most relevant markers and to estimate the genetic individual weight trajectory over time (genomic growth curve) under different quantiles (levels). Results: The regularized quantile regression (RQR) enabled the discovery, at different levels of interest (quantiles), of the most relevant markers allowing for the identification of QTL regions. We found the same relevant markers simultaneously affecting different growth curve parameters (mature weight and maturity rate): two (ALGA0096701 and ALGA0029483) for RQR(0.2), one (ALGA0096701) for RQR(0.5), and one (ALGA0003761) for RQR(0.8). Three average genomic growth curves were obtained and the behavior was explained by the curve in quantile 0.2, which differed from the others. Conclusions: RQR allowed for the construction of genomic growth curves, which is the key to identifying and selecting the most desirable animals for breeding purposes. Furthermore, the proposed model enabled us to find, at different levels of interest (quantiles), the most relevant markers for each trait (growth curve parameter estimates) and their respective chromosomal positions (identification of new QTL regions for growth curves in pigs). These markers can be exploited under the context of marker assisted selection while aiming to change the shape of pig growth curves.  aSwine  aMelhoramento genético animal  aPorco  aSuíno  aGenome association  aGrowth curves  aPig  aQTL  aRegularized quantile regression1 aNASCIMENTO, M.1 aNASCIMENTO, A. C. C.1 aSILVA, F. F.1 aSERÃO, N. V. L.1 aCRUZ, C. D.1 aRESENDE, M. D. V. de1 aSILVA, F. L.1 aAZEVEDO, C. F.1 aLOPES, P. S.1 aGUIMARÃES, S. E. F.  tJournal of Animal Science and Biotechnologygv. 8, n. 59, 2017.