The use of a triploid hybrid for introgression in Lolium species

Type Article
Original languageEnglish
Pages (from-to)299-304
JournalTheoretical and Applied Genetics
Volume76
Issue number2
DOI
Publication statusPublished - Aug 1988
Links
Permanent link
View graph of relations
Citation formats

Abstract

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

Keywords

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