Productivity under contrasting cutting regimes of perennial ryegrass selected for short and long leaves |
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Authors: | L Hazard M Ghesquière |
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Institution: | (1) Génétique des Graminées pérennes, INRA, Amélioration des Plantes Fourragères, 86600 Lusignan, France |
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Abstract: | The productivity of short-leaved and long-leaved perennial ryegrass was evaluated in 5 different sites. In each site, half-sib
families, derived from the first cycle of divergent selection on leaf length, were managed both under infrequent cutting and
under frequent cutting simulating grazing. Despite the importance of the effects of the site and the cutting frequency, the
dry matter yield was dependent on the interaction between the morphogenetic type resulting from the selection and the cutting
frequency imposed by the management. Thus, under infrequent cutting, the long-leaved families on average out-yielded the short-leaved
families. Conversely, under frequent cutting the short-leaved families were on average the most productive. The use of morphogenetic
traits as selection criteria in breeding for management-dependent yield is briefly discussed.
This revised version was published online in July 2006 with corrections to the Cover Date. |
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Keywords: | cutting frequency dry matter Lolium perenne perennial ryegrass plant improvement yield |
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