The use of a triploid hybrid for introgression in Lolium species

Howard Thomas, W. G. Morgan, M. W. Humphreys

Research output: Contribution to journalArticlepeer-review


Triploid hybrids of Lolium multiflorum (4x) x L. perenne (2x) behaved cytologically as autotriploids but the segregation of isozyme variants did not always agree with the expected trisomic ratios. The overall effect of these deviations from expectation was a greater proportion than expected of diploid progeny from the cross L. multiflorum (2x) x triploid hybrid which did not include any of the L. perenne alleles at the three marker isozyme loci. The possible mechanisms for these aberrant segregation ratios are discussed together with the advantages of the crossing scheme to accelerate the recovery of the genotype of the recurrent parent in a backcrossing programme to transfer characters from one species to another
Original languageEnglish
Pages (from-to)299-304
Number of pages6
JournalTheoretical and Applied Genetics
Issue number2
Publication statusPublished - Aug 1988


  • Lolium
  • interspecific hybrids
  • backcrossing
  • genetic segregation
  • introgression


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