02794naa a2200373 a 450000100080000000500110000800800410001902400500006010000190011024501580012926000090028730000100029652016930030665000330199965300180203265300210205065300240207165300080209565300170210365300230212065300100214370000210215370000160217470000230219070000150221370000190222870000220224770000180226970000130228770000200230070000200232070000200234077300600236021380712021-12-20       2021    bl uuuu     u00u1 u    #d7 ahttps://doi.org/10.3389/fpls.2021.7379192DOI1 aMARTINS, F. B.  aA semi-automated SNP-based approach for contaminant identification in biparental Polyploid Populations of tropical forage grasses.h[electronic resource]  c2021  a19 p.  aArtificial hybridization plays a fundamental role in plant breeding programs since it generates new genotypic combinations that can result in desirable phenotypes. Depending on the species and mode of reproduction, controlled crosses may be challenging, and contaminating individuals can be introduced accidentally. In this context, the identification of such contaminants is important to avoid compromising further selection cycles, as well as genetic and genomic studies. The main objective of this work was to propose an automated multivariate methodology for the detection and classification of putative contaminants, including apomictic clones (ACs), self-fertilized individuals, half-siblings (HSs), and full contaminants (FCs), in biparental polyploid progenies of tropical forage grasses. We established a pipeline to identify contaminants in genotyping-by-sequencing (GBS) data encoded as allele dosages of single nucleotide polymorphism (SNP) markers by integrating principal component analysis (PCA), genotypic analysis (GA) measures based on Mendelian segregation, and clustering analysis (CA). The combination of these methods allowed for the correct identification of all contaminants in all simulated progenies and the detection of putative contaminants in three real progenies of tropical forage grasses, providing an easy and promising methodology for the identification of contaminants in biparental progenies of tetraploid and hexaploid species. The proposed pipeline was made available through the polyCID Shiny app and can be easily coupled with traditional genetic approaches, such as linkage map construction, thereby increasing the efficiency of breeding programs.  aPrincipal component analysis  aAllele dosage  aApomictic clones  aClustering analysis  aGBS  aHalf sibling  aSelf fertilization  aShiny1 aMORAES, A. C. L.1 aAONO, A. H.1 aFERREIRA, R. C. U.1 aCHIARI, L.1 aSIMEÃO, R. M.1 aBARRIOS, S. C. L.1 aSANTOS, M. F.1 aJANK, L.1 aVALLE, C. B. do1 aVIGNA, B. B. Z.1 aSOUZA, A. P. DE  tFrontiers in Plant Sciencegv.12, article 737919, 2021.