Abstract

Allelopathy is the ability of an organism to affect the growth of another organism through the introduction of chemical compounds into the environment. Several researchers have reported rice inhibition of the growth of weed species such as barnyard grass and ducksalad. The objective of this study was to relate patterns found in HPLC chromatograms for leaf extracts of different rice accessions to their weed control activity. K-means cluster analysis was performed on 20 peak heights from chromatograms from 40 rice accessions. The resulting clusters corresponded to observed behavior of the accessions reported in other sources. Stepwise discriminant analysis was used to determine if the number of peaks needed to separate accession types could be reduced.

Keywords

Discriminant analysis; Principal components

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Apr 30th, 9:00 AM

ANALYSIS OF THE ALLELOPATHIC POTENTIAL OF RICE USING K-MEANS CLUSTERING OF HPLC CHROMATOGRAMS

Allelopathy is the ability of an organism to affect the growth of another organism through the introduction of chemical compounds into the environment. Several researchers have reported rice inhibition of the growth of weed species such as barnyard grass and ducksalad. The objective of this study was to relate patterns found in HPLC chromatograms for leaf extracts of different rice accessions to their weed control activity. K-means cluster analysis was performed on 20 peak heights from chromatograms from 40 rice accessions. The resulting clusters corresponded to observed behavior of the accessions reported in other sources. Stepwise discriminant analysis was used to determine if the number of peaks needed to separate accession types could be reduced.