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Progress and potential of interspecific hybrids of Lolium and Festuca

Published online by Cambridge University Press:  27 March 2009

H. Thomas  and
M. O. Humphreys
H. Thomas
Affiliation:
AFRC Institute of Grassland and Environmental Research, Welsh Plant Breeding Station, Plus Gogerddan, Aberystwyth, Dyfed SY23 3EB, UK
M. O. Humphreys
Affiliation:
AFRC Institute of Grassland and Environmental Research, Welsh Plant Breeding Station, Plus Gogerddan, Aberystwyth, Dyfed SY23 3EB, UK
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Summary

The Lolium-Festuca complex of related species provides a wide range of variation for the development of versatile grasses adapted to meet the changing requirements of livestock farming. Various approaches have been used in order to harness the full potential of this variation. Tetraploid hybrids between the two ryegrass species L. perenne and L. multiflorum have resulted in stable and successful commercial varieties. Hybrids between more distantly related ryegrass and fescue species have demonstrated useful combinations of traits from both parents. Chromosome doubling is necessary in these hybrids to restore fertility in synthetic amphiploids. However, genetic instability can still be a problem and research is in progress to obtain tighter control of chromosome pairing. An alternative approach is to introduce a few specific traits from fescues into ryegrasses, or vice versa, using introgressive breeding procedures. This review outlines the progress already achieved in exploiting the ryegrass–fescue complex by using these various approaches and assesses the potential of hybrid derivatives.

Type
Review
Information
The Journal of Agricultural Science , Volume 117 , Issue 1 , August 1991 , pp. 1 - 8
Copyright
Copyright © Cambridge University Press 1991

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