Variation in the reproductive development of perennial ryegrass (Lolium perenne L.) cultivars
| Autor: | Julia M. Lee, L. Rossi, C. M. Wims, D. F. Chapman |
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| Rok vydání: | 2014 |
| Předmět: | |
| Zdroj: | Proceedings of the New Zealand Grassland Association. 76:189-192 |
| ISSN: | 1179-4577 0369-3902 |
| DOI: | 10.33584/jnzg.2014.76.2938 |
| Popis: | Plant breeding has manipulated the flowering behaviour of perennial ryegrass (Lolium perenne L.) by developing later-heading cultivars. However, the impacts of breeding on the intensity and temporal distribution of flowering are not known. This study compared the reproductive development of 23 perennial ryegrass cultivar/endophyte combinations. In the Waikato and Canterbury, two replicate plots were closed from grazing and tillers were collected every two weeks over a 10-week period during late spring and early summer. Plant development stage was determined for each tiller using a quantitative scale, which was then used to calculate the mean stage count of each cultivar. The rate and timing of reproductive development differed among cultivars. Mid-maturing cultivars matured earlier at both sites compared with late- and very late-maturing cultivars. While the intensity of flowering was similar between maturity groups, the temporal distribution of flowering varied: the late- and very late-maturing cultivars had lower proportions of reproductive tillers early in the season. Keywords: Lolium perenne L., reproductive development, flowering behaviour |
| Databáze: | OpenAIRE |
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