Journal of Crop Science and Biotechnology

, Volume 13, Issue 1, pp 47–52 | Cite as

Estimation of genetic distance and its predictability of F1 hybrid performance in barley

  • Hong-Sik KimEmail author
  • Jung-Gon Kim
  • Seong-Bum Baek
  • Jong-Jin Hwang
Research Article


Heterotic performance of hybrids is dependent upon the amount of genetic variability among parents and combining ability of alleles at the loci associated with target traits. This study was carried out to determine if (1) pedigree-based genetic distance could explain molecular levels of genetic diversity, and (2) molecular marker-based genetic distance could predict the degree of hybrid performance in barley. The average value of Random Amplified Polymorphic DNA (RAPD)-based genetic similarity for all 58 genotypes was 0.641. Twenty-two hulless barley and eight malt barley varieties showed low levels of genetic diversity with higher similarity values than the average of all or of the hulled barley variety pool. Coefficients of parentage (COPs) computed for 1,653 pairs of 58 Korean barley varieties ranged from 0 to 0.984 with a mean of 0.048. Correlation between the genealogical and RAPD-based genetic similarity matrices was 0.256 (P < 0.01). Correlation values for the related and for all (related + unrelated) genotype pairs were almost similar to each other, indicating that the unrelated genotypes share a large portion of genomes alike in state, not identical by descent. RAPD-based genetic similarity estimates among parents were poorly correlated with their hybrid performance such as 1,000-grain weight (r = 0.34), biomass yield (r = −0.12), and grain yield (r = −0.04) for 11 genotype pairs of hulled barley. However, correlations between heterozygosity at marker loci and hybrid performance for biomass and grain yield slightly increased when two F1 hybrids were excluded in the analysis due to their low yield.

Key words

barley genetic distance hybrid performance RAPD coefficient of parentage 


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Copyright information

© Korean Society of Crop Science and Springer Netherlands 2010

Authors and Affiliations

  • Hong-Sik Kim
    • 1
    Email author
  • Jung-Gon Kim
    • 2
  • Seong-Bum Baek
    • 3
  • Jong-Jin Hwang
    • 3
  1. 1.International Technology Cooperation CenterRural Development AdministrationSuwonRepublic of Korea
  2. 2.Department of Rice and Winter Cereal Crop, National Institute of Crop ScienceRural Development AdministrationIksanRepublic of Korea
  3. 3.Upland Crop Division, National Institute of Crop ScienceRural Development AdministrationSuwonRepublic of Korea

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