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Classification of Dry‐Milled Maize Grit Yield Groups Using Quadratic Discriminant Analysis and Decision Tree Algorithm
Author(s) -
Lee KyungMin,
Herrman Timothy J.,
Bean Scott R.,
Jackson David S.,
Lingenfelser Jane
Publication year - 2007
Publication title -
cereal chemistry
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.558
H-Index - 100
eISSN - 1943-3638
pISSN - 0009-0352
DOI - 10.1094/cchem-84-2-0152
Subject(s) - linear discriminant analysis , principal component analysis , yield (engineering) , grit , mathematics , quadratic classifier , discriminant , decision tree , regression analysis , multivariate statistics , hybrid , linear regression , statistics , agronomy , artificial intelligence , support vector machine , computer science , biology , materials science , psychology , developmental psychology , metallurgy
A genetically and environmentally diverse collection of maize ( Zea maize L.) samples was evaluated for physical properties and grit yield to help develop a standard set of criteria to identify grain best suited for dry‐milling. Application of principal component analysis (PCA) reduced a set of approximately 500 samples collected from six states to 154 maize hybrids. Selected maize hybrids were placed into seven groups according to their dry‐milled grit yields. Regression analysis explained only 50% of the variability in dry‐milling grit yield. Patterns of differences in the physical properties for the seven grit yield groups implied that the seven yield groups could be placed into two or three groups. Using two pattern recognition techniques for improving classification accuracy, quadratic discriminant analysis and the classification and regression tree (CART) model, dry‐milled grit yield groups were predicted. The estimated correct classification rates were 69–80% when the samples were divided into three yield groups and 81–90% when samples were divided into two yield groups. The results indicated the comparable success of both techniques and the superiority of the decision tree algorithm to quadratic discriminant analysis by offering higher accuracy and clearer classification rules in differentiating among dry‐milled grit yield groups.