Genetic Resources and Crop Evolution

, Volume 52, Issue 8, pp 1049–1056 | Cite as

Development of Core Collection in Pigeonpea [Cajanus cajan (L.) Millspaugh] using Geographic and Qualitative Morphological Descriptors

  • L. J. Reddy
  • Hari D. Upadhyaya
  • C. L. L. Gowda
  • Sube Singh
Article

Abstract

Pigeonpea is an important pulse crop grown by smallholder farmers in the semi-arid tropics. Most of the pigeonpea cultivars grown to date are selections from the landraces, with a narrow genetic base. With the expansion of the crop to newer areas, problems of local importance are to be addressed. Hence, an economically feasible and faster germplasm evaluation mechanism, such as a core collection, is required. This article describes the development of core collection from 12,153 pigeonpea accessions collected from 56 countries and maintained at ICRISAT, Patancheru, India. The germplasm accessions from 56 countries were placed under 14 clusters based primarily on geographic origin. Data on 14 qualitative morphological traits were used for cluster formation by Ward’s method. From each cluster ≈10% accessions were randomly selected to constitute a core collection comprising 1290 accessions. Mean comparisons using Newman–Keuls test, variances’ comparisons by Levene’s test, and comparison of frequency distribution by χ2-test indicated that the core collection was similar to that of the entire collection for various traits and the genetic variability available in the entire collection is preserved in the core collection. The Shannon–Weaver diversity index for different traits was also similar for both entire and core collection. All the important phenotypic associations between different traits available in the entire collection were preserved in the core collection. The core collection constituted in the present study facilitates identification of useful traits economically and expeditiously for use in pigeonpea improvement.

Keywords

Cajanus cajan Core collection Genetic resources Redgram 

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Copyright information

© Springer 2005

Authors and Affiliations

  • L. J. Reddy
    • 1
  • Hari D. Upadhyaya
    • 1
  • C. L. L. Gowda
    • 1
  • Sube Singh
    • 1
  1. 1.International Crops Research Institute for the Semi-Arid Tropics (ICRISAT)India

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