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A method for establishing a core collection of Saccharum officinarum L. germplasm based on quantitative-morphological data

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Abstract

A technique is proposed for establishing a representative core collection of S. officinarum accessions from the world collection of sugarcane germplasm maintained at the Sugarcane Breeding Institute-Research Centre, Cannanore, India. In the proposed method, the accessions were first sorted based on their relative contributions to the total variability by means of principal component scores based on a set of quantitative characters. Then, the cumulative proportion of their contributions to the total variance was computed. A logistic regression model was fitted to evaluate the functional relationship between the cumulative proportion of variance and the number of accessions. The size of the core set was decided as the inflection point on that fitted curve, i.e., the point beyond which the rate of increase in cumulative proportion of variability contributed by an accession began to decline. A method for eliminating entries with a high degree of similarity from the selected core set is also proposed.

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Authors and Affiliations

  1. Sugarcane Breeding Institute, Coimbatore, 641 007, India

    R. Balakrishnan

  2. Sugarcane Breeding Institute, Coimbatore, 641 007, India

    N.V. Nair & T.V. Sreenivasan

Authors
  1. R. Balakrishnan
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  2. N.V. Nair
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  3. T.V. Sreenivasan
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Balakrishnan, R., Nair, N. & Sreenivasan, T. A method for establishing a core collection of Saccharum officinarum L. germplasm based on quantitative-morphological data. Genetic Resources and Crop Evolution 47, 1–9 (2000). https://doi.org/10.1023/A:1008780526154

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