Comparisons of sugarcane yields in trials and in commercial fields
| MSI07P4270 | |
| Bissessur, D. Ramnawaz, C. Ramdoyal, K. | |
| Comparisons of sugarcane yields in trials and in commercial fields | |
| periodical | |
| 2007 | |
| Proc. int. Soc. Sug. Cane Technol. | |
| 26: 681-690 | |
| En | |
| En Sp Fr | |
| SUGARCANE cultivars are released for commercial exploitation on the basis of results obtained from clonal trials. These trials are assumed to predict the commercial performance of cultivars in the areas where the respective cultivars are recommended for cultivation. This assumption needs investigation since there have been cases where commercial yields have failed to reflect trial yields under similar conditions. This study was therefore initiated to determine whether trials gave a good prediction of yields in commercial fields. Data from three series of final phase trials established in the subhumid zone in three different years and corresponding ones from commercial fields planted in the same year were retrieved for analysis. The first two series of analyses compared the performance of two popular cultivars, the commercial control R 570, and a drought tolerant one, M 1176/77, while the third series involved the same control and the newly released cultivar, M 1400/86. Data pairs used were mean yields of cultivars where different crops, plant cane, first, second and third ratoons were treated as separate entries. Cumulated mean yield for all crop cycles also were considered. T-tests and Model II regression analyses were used. Commercial yields plotted against experimental yields followed a Mitscherlich curve for the first series. Coefficient of determination of 62per cent was obtained for the cumulative crop data. Predicted values obtained for commercial yields were not significantly different from the observed yields. The new cultivars performed better than the controls in both the trials and at the commercial level. The mean yield of the respective cultivars in the trials and commercial fields were not significantly different for all three series of data. However, the magnitude of this difference in yield varied for different data sets. The implications of these observations are discussed. | |
| sugarcane breeding varieties yields yield prediction commercial varieties Mitscherlich curve | |
| Mauritius | |
| Cane breeding and genetic improvement | |
| Breeding: Crossing | |
| 2007-08-13 | |
| En | |
| LIB | |
| CAT | |
| PB Biom |