Genetic Resources and Crop Evolution

, Volume 64, Issue 4, pp 733–744

Genetic diversity patterns in ex situ collections of Oryza officinalis Wall. ex G. Watt revealed by morphological and microsatellite markers

  • Maria Elizabeth Boncodin Naredo
  • Sheila Mae Quilloy Mercado
  • Maria Celeste Naynes Banaticla-Hilario
  • Myrricar Loren Berdos
  • Mario Alcantara Rodriguez
  • Kenneth Lee McNally
  • Ruaraidh Sackville Hamilton
Research Article

Abstract

This study was conducted to understand variation patterns and establish the population structure in the wild rice species, Oryza officinalis, using accessions collected across the 11 regions/areas of endemism in Asia and Oceania and conserved ex situ in the International Rice Genebank at the International Rice Research Institute. Morphological and microsatellite data detected a tendency for latitudinal divergence in O. officinalis and divided the accessions into (1) Malesian and (2) South and East Asian populations. Cluster and ordination analyses of morphological characters revealed that accessions from Malesia (Regions 1–6), Vietnam (Region 7), and Central Thailand (Region 8) showed short (16.19 ± 3.70 cm) and slender (1.53 ± 2.06 cm) flag leaves that are erect to almost horizontal, short panicles (25.19 ± 3.02 cm) and mainly purple internodes; and (3) accessions from Northern Thailand and Myanmar (Region 9), India (Region 10) and China (Region 11) characterized by long (29.57 ± 4.94 cm) and broad (2.18 ± 3.33 cm) flag leaves that are horizontal to drooping, long panicles (35.26 ± 2.63 cm) and green internodes. With 79.3 % of the SSR markers being polymorphic, molecular analyses detected an average of 5.31 alleles per marker with a total of 154 alleles. Differentiation was evident among the regions with FST = 0.2173, although there is an apparent loss of heterozygosity across regions indicated by an over-all positive FIS. Based on the results, issues related to the management of O. officinalis, specifically filling gaps in the collection and the formulation of seed multiplication practices are addressed.

Keywords

Ex situ conservation Geographic differentiation Oryza officinalis Population structure Wild Oryza germplasm 

Supplementary material

10722_2016_396_MOESM1_ESM.pdf (145 kb)
Supplementary material 1 (pdf 145 kb)
10722_2016_396_MOESM2_ESM.pdf (105 kb)
Supplementary material 2 (pdf 104 kb)
10722_2016_396_MOESM3_ESM.pdf (102 kb)
Supplementary material 3 (pdf 101 kb)
10722_2016_396_MOESM4_ESM.pdf (3.7 mb)
Supplementary material 4 (pdf 3764 kb)

Copyright information

© Springer Science+Business Media Dordrecht 2016

Authors and Affiliations

  • Maria Elizabeth Boncodin Naredo
    • 1
  • Sheila Mae Quilloy Mercado
    • 1
  • Maria Celeste Naynes Banaticla-Hilario
    • 1
  • Myrricar Loren Berdos
    • 1
  • Mario Alcantara Rodriguez
    • 1
  • Kenneth Lee McNally
    • 1
  • Ruaraidh Sackville Hamilton
    • 1
  1. 1.International Rice Research InstituteLos BañosPhilippines

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