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Updated: May 5, 2026

Manipulation of Ploidy in Caenorhabditis elegans
Published on: March 15, 2018
Genetic segregation in relation to chromosome pairing in tetraploid hybrids between Lolium perenne and L. multiflorum
1Welsh Plant Breeding Station, Plas Gogerddan, Aberystwyth, UK.
Abstract:
Segregation at one of the loci controlling tiller-base pigmentation was studied to determine the mode of inheritance in tetraploid hybrids between Lolium perenne and L. multiflorum. The results could be explained by tetrasomic inheritance and thus did not support previous reports of a degree of preferential chromosome pairing in this material. However, double reduction and aneuploidy may to some extent have masked any tendency to disomic segregation brought about by preferential pairing. Moreover, there was significant heterogeneity between families in the segregation ratios which may indicate genetically controlled differences in pairing behaviour. The results are related to previous cytological and genetic studies.
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