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Discrimination of Acacia seeds at species and subspecies levels using an image analyzer

Forest Science and Practice volume 15, pages 253–260 (2013)Cite this article

Abstract

Seeds of Acacia species and subspecies were characterized using an image analyzer and discriminated for the purpose of identification of species, using their seeds. The species considered in the study were Acacia nilotica subsp. indica, A. nilotica subsp. cupressiformis, A. nilotica subsp. tomentosa, A. tortilis subsp. raddiana, A. tortilis subsp. spirocarpa, A. raddiana, A. senegal, A. auriculiformis, A. farnesiana, A. leucophloea, A. mearnsii, A. melanoxylon, A. planifrons and A. mangium. Eight samples each consisting of 25 seeds per species were studied using the image analyzer for physical characteristics of seeds, such as 2D surface area, length, width, perimeter, roundness, aspect ratio and fullness ratio. Discriminant analysis showed that acacias can be discriminated at species and subspecies levels, with 96% accuracy. Exceptions were A. nilotica subsp. tomentosa (75.0%), A. tortilis subsp. spirocarpa (75.0%) and A. raddiana (87.5%) which had relatively low discrimination accuracy. However, discriminant analysis within selected species showed complete recognition of these species except for A. tortilis subsp. spirocarpa, that had still a large overlap with A. leucophloea. The study also revealed that both seed size and shape characteristics were responsible for species discrimination. It can be concluded that rapid analysis of seed size and shape characteristics using image analysis techniques can be used as primary and secondary keys for identification of acacias.

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Authors and Affiliations

  1. Division of Seed Technology, Institute of Forest Genetics and Tree Breeding, Indian Council of Forestry Research and Education, Coimbatore, 641002, India

    V. Sivakumar, R. Anandalakshmi, Rekha R. Warrier, B. G. Singh & B. Nagarajan

  2. Swedish University of Agricultural Sciences, Southern Swedish Forest Research Centre, Alnarp, SE-230 53, Sweden

    M. Tigabu

Authors
  1. V. Sivakumar
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  2. R. Anandalakshmi
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  3. Rekha R. Warrier
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  4. B. G. Singh
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  5. M. Tigabu
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  6. B. Nagarajan
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Correspondence to M. Tigabu.

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Sivakumar, V., Anandalakshmi, R., Warrier, R.R. et al. Discrimination of Acacia seeds at species and subspecies levels using an image analyzer. For. Sci. Pract. 15, 253–260 (2013). https://doi.org/10.1007/s11632-013-0414-4

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  • DOI: https://doi.org/10.1007/s11632-013-0414-4

Keywords

  • Acacia
  • image analyzer
  • discriminant analysis
  • seed identification