Yield comparisons of old and new cultivars of swedes(Brassica napusssp.napobrassica)in Southland, New Zealand
| Autor: | S. D. Armstrong, S. Gowers, Ruth C. Butler |
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| Rok vydání: | 2006 |
| Předmět: | |
| Zdroj: | New Zealand Journal of Crop and Horticultural Science. 34:109-114 |
| ISSN: | 1175-8783 0114-0671 |
| Popis: | Yield trials of swedes (Brassica napus ssp. napobrassica) were analysed to compare the performance of recently released cultivars with the older cultivars they have replaced. Data from 1993/94 to 1997/98 were analysed using a mixed model analysis and G*e effects were examined. The recently released ‘Major Plus’ produced the highest fresh weight yield of bulb, 105 t/ha, 15% higher than ‘Doon Major’, the low dry matter (DM) cultivar that it has replaced. ‘Highlander’ had over 14% higher bulb DM yield than ‘Doon Major’ and the other main crop cultivars that have been replaced. ‘Tina’, the older cultivar with good clubroot and dry rot resistance, had a low yield. ‘Winton’ was bred to combine the disease resistance of ‘Tina’ with the yield of ‘Highlander'; it produced a bulb dry yield 5% higher than ‘Highlander’ and 47% higher than ‘Tina’. Estimates of total dry weight yield gave similar results and over the trial environments and years examined ‘Winton’ was also the most stable cultivar for total dry... |
| Databáze: | OpenAIRE |
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