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Genetic diversity among cultivars, landraces and wild relatives of rice as revealed by microsatellite markers

Journal of Applied Genetics volume 48, pages 337–345 (2007)Cite this article

Abstract

Genetic diversity among 35 rice accessions, which included 19 landraces, 9 cultivars and 7 wild relatives, was investigated by using microsatellite (SSR) markers distributed across the rice genome. The mean number of alleles per locus was 4.86, showing 95.2% polymorphism and an average polymorphism information content of 0.707. Cluster analysis based on microsatellite allelic diversity clearly demarcated the landraces, cultivars and wild relatives into different groups. The allelic richness computed for the clusters indicated that genetic diversity was the highest among wild relatives (0.436), followed by landraces (0.356), and the lowest for cultivars. Allelic variability among the SSR markers was high enough to categorize cultivars, landraces and wild relatives of the rice germplasm, and to catalogue the genetic variability observed for future use. The results also suggested the necessity to introgress genes from landraces and wild relatives into cultivars, for cultivar improvement.

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Affiliations

  1. Centre for Plant Breeding and Genetics, Tamil Nadu Agricultural University, 641 003, Coimbatore, India

    Sundaram Ganesh Ram, Venkatesan Thiruvengadam & Kunnummal Kurungari Vinod

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  1. Sundaram Ganesh Ram
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  2. Venkatesan Thiruvengadam
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  3. Kunnummal Kurungari Vinod
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Correspondence to Sundaram Ganesh Ram.

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Ram, S.G., Thiruvengadam, V. & Vinod, K.K. Genetic diversity among cultivars, landraces and wild relatives of rice as revealed by microsatellite markers. J Appl Genet 48, 337–345 (2007). https://doi.org/10.1007/BF03195230

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  • DOI: https://doi.org/10.1007/BF03195230

Keywords

  • genetic diversity
  • rice landraces
  • microsatellite markers
  • multiple alleles
  • Oryza spp.
  • PIC values