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This article in AJ

  1. Vol. 73 No. 4, p. 623-625
    Received: Aug 1, 1980

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Protein and Oil Content of Winged Bean Seeds as Measured by Near-Infrared Light Reflectance1

  1. D. F. Hildebrand,
  2. C. Chaven,
  3. T. Hymowitz,
  4. H. H. Bryan and
  5. A. A. Duncan2



Grain analyzers are being utilized by plant breeders to estimate the protein and oil content of various agricultural commodities. The method is rapid and inexpensive. Its potential use for the analysis of winged bean [Psophocarpus tetragonolobus (L.) DC.] seed meal was investigated in this study. Simultaneous estimations of protein and oil concentrations in winged bean seed meals made by a near-infrared light reflectance instrument coupled to an analog computer (grain analyzer) were compared to protein and oil determinations by Kjeldahl and Soxhlet extraction procedures. The correlation between Kjeldahl protein and the grain analyzer values was 0.998. The correlation between Soxhlet extracted oil and the grain analyzer values was 0.995.

The 240 winged bean accessions evaluated in this study were obtained from 16 countries. The seed protein contents ranged from 20.7 to 45.9%. The seed oil contents ranged from 7.2 to 21.5%.

A centrally located grain analyzer facility should be able to monitor the protein and oil values in winged bean cultivar and breeding trials carried out anywhere in the world.

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