title: Principal variance component analysis of crop composition data: a case study on herbicide-tolerant cotton.
abstract: Compositional studies on genetically modified (GM) and non-GM crops have consistently demonstrated that their respective levels of key nutrients and antinutrients are remarkably similar and that other factors such as germplasm and environment contribute more to compositional variability than transgenic breeding. We propose that graphical and statistical approaches that can provide meaningful evaluations of the relative impact of different factors to compositional variability may offer advantages over traditional frequentist testing. A case study on the novel application of principal variance component analysis (PVCA) in a compositional assessment of herbicide-tolerant GM cotton is presented. Results of the traditional analysis of variance approach confirmed the compositional equivalence of the GM and non-GM cotton. The multivariate approach of PVCA provided further information on the impact of location and germplasm on compositional variability relative to GM.
authors: Maritz Holdings Inc., 1395 North Highway Drive, Fenton, Missouri 63099, USA.
authors: Jay M
authors: JM
authors: Harrison
authors: Delia
authors: D
authors: Howard
authors: Marianne
authors: M
authors: Malven
authors: Steven C
authors: SC
authors: Halls
authors: Angela H
authors: AH
authors: Culler
authors: George G
authors: GG
authors: Harrigan
authors: Russell D
authors: RD
authors: Wolfinger
mesh_terms: D018556:Crops, Agricultural / Q000737:chemistry* / Q000235:genetics* / Q000254:growth & development / Q000378:metabolism; D004351:Drug Resistance; D003368:Gossypium / Q000737:chemistry* / Q000235:genetics / Q000254:growth & development / Q000378:metabolism; D006540:Herbicides; D030821:Plants, Genetically Modified / Q000737:chemistry* / Q000254:growth & development / Q000378:metabolism; D025341:Principal Component Analysis; D012639:Seeds / Q000737:chemistry* / Q000254:growth & development / Q000378:metabolism; D014481:United States
chemical_list: D006540:Herbicides