Detection of quantitative trait loci for agronomic, yield, grain and disease characters in spring barley (Hordeum vulgare L.)

W. T.B. Thomas (Lead / Corresponding author), W. Powell, R. Waugh, K. J. Chalmers, U. M. Barua, P. Jack, V. Lea, B. P. Forster, J. S. Swanston, R. P. Ellis, P. R. Hanson, R. C.M. Lance

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Abstract

Quantitative trait loci (QTLs) have been revealed for characters in a segregating population from a spring barley cross between genotypes adapted to North-West Europe. Transgressive segregation was found for all the characters, which was confirmed by the regular detection of positive and negative QTLs from both parents. A QTL for all the agronomic, yield and grain characters measured except thousand grain weight was found in the region of the denso dwarfing gene locus. There were considerable differences between the location of QTLs found in the present study and those found in previous studies of North American germ plasm, revealing the diversity between the two gene pools. Thirty-one QTLs were detected in more than one environment for the 13 characters studied, although many more were detected in just one environment. Whilst biometrical analyses suggested the presence of epistasis in the genetic control of some characters, there was little evidence of interactions between the QTLs apart from those associated with yield. QTLs of large effect sometimes masked the presence of QTLs of smaller effect.

Original languageEnglish
Pages (from-to)1037-1047
Number of pages11
JournalTheoretical and Applied Genetics
Volume91
Issue number6-7
DOIs
Publication statusPublished - 1 Nov 1995

Keywords

  • Barley
  • Linkage
  • Markers
  • QTLs
  • Yield

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    Thomas, W. T. B., Powell, W., Waugh, R., Chalmers, K. J., Barua, U. M., Jack, P., Lea, V., Forster, B. P., Swanston, J. S., Ellis, R. P., Hanson, P. R., & Lance, R. C. M. (1995). Detection of quantitative trait loci for agronomic, yield, grain and disease characters in spring barley (Hordeum vulgare L.). Theoretical and Applied Genetics, 91(6-7), 1037-1047. https://doi.org/10.1007/BF00223917