J Integr Plant Biol. ›› 2009, Vol. 51 ›› Issue (12): 1116-1125.DOI: 10.1111/j.1744-7909.2009.00882.x

• Molecular Physiology • Previous Articles     Next Articles

Development of a Core Set from a Large Rice Collection using a Modified Heuristic Algorithm to Retain Maximum Diversity

Hun-Ki Chung1, Kyu-Won Kim1, Jong-Wook Chung2, Jung-Ro Lee1, Sok-Young Lee1, Anupam Dixit3, Hee-Kyoung Kang4, Weiguo Zhao2,5, Kenneth L. McNally6, Ruraidh S. Hamilton6, Jae-Gyun Gwag1 and Yong-Jin Park2*   

  1. 1National Agrobiodiversity Center, National Academy of Agricultural Science, Suwon 441-707, Korea
    2Department of Plant Resources, College of Industrial Sciences, Kongju National University, Yesan 340-802, Korea
    3Rice DNA and Quality Testing Laboratory, Basmati Export Development Foundation SVBP University of Agriculture and Technology, Meerut 250110, India
    4Department of Horticultural Science, College of Industrial Science, Kongju National University, Yesan 340-802, Korea
    5Jiangsu University of Science and Technology, Sericultural Research Institute, Chinese Academy of Agricultural Sciences, Zhenjiang 212018, China
    6Genetic Resources Center, International Rice Research Institute, Metro Manila 1301, Philippines
  • Received:2009-05-19 Accepted:2009-09-01 Published:2009-11-26
  • About author: 2*Author for correspondence Tel: +82 41 330 1201; Fax: +82 41 330 1209; E-mail: yjpark@kongju.ac.kr


A new heuristic approach was undertaken for the establishment of a core set for the diversity research of rice. As a result, 107 entries were selected from the 10 368 characterized accessions. The core set derived using this new approach provided a good representation of the characterized accessions present in the entire collection. No significant differences for the mean, range, standard deviation and coefficient of variation of each trait were observed between the core and existing collections. We also compared the diversity of core sets established using this Heuristic Core Collection (HCC) approach with those of core sets established using the conventional clustering methods. This modified heuristic algorithm can also be used to select genotype data with allelic richness and reduced redundancy, and to facilitate management and use of large collections of plant genetic resources in a more efficient way.

Chung HK, Kim KW, Chung JW, Lee JR, Lee SY, Dixit A, Kang HK, ZhaoW, McNally KL, Hamilton NRS, Gwag JG, Park YJ (2009). Development of a core set from a large rice collection using a modified heuristic algorithm to retain maximum diversity. J. Integr. Plant Biol. 51(12), 1116–1125.

Key words: core collection, genetic diversity, heuristic core collection, Oryza sativa, sampling strategy.

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