Improved Drought Resistance in Introgression Lines Derived from Lolium multiflorum × Festuca arundinacea Hybrids

M. W. Humphreys, Henry Thomas

Research output: Contribution to journalArticlepeer-review

Abstract

In a back-crossing programme involving Lolium multiflorum (the recurrent parent) and Festuca arundinacea, the diploid L. multiflorum phenotype was rapidly recovered with the inclusion, in some progeny, of a small number of genes from the fescue parent. In field drought trials derivatives of these backcross populations were on average less drought resistant than the L. multiflorum parental populations, but 3 % of individuals were as drought resistant as F. arundinacea. After only one cycle of selection and polycrossing these drought-resistant Lolium-like plants, the mean drought resistance of most progeny lines was significantly improved, in some cases to near that of F. arundinacea. Available evidence strongly indicates that this improved drought resistance was due to the transfer of genetic material from Festuca into Lolium. These populations will contribute to variety improvement and to our understanding of the genetics and physiology of drought resistance.
Original languageEnglish
Pages (from-to)155-161
Number of pages7
JournalPlant Breeding
Volume111
Issue number2
DOIs
Publication statusPublished - Sept 1993

Keywords

  • Festulolium
  • intergeneric hybrids
  • tall fescue
  • Italian ryegrass
  • — intergeneric hybrids
  • — tall fescue
  • — Italian ryegrass

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