Earliness of ripening in sugar cane (Saccharum spp. L.) in Mauritius: variation and inheritance studies
| MSI99P2356 | |
| Mamet, L. D. Julien, M. H. R. Galwey, N. W. | |
| Earliness of ripening in sugar cane (Saccharum spp. L.) in Mauritius: variation and inheritance studies | |
| Periodical article | |
| 1996 | |
| Sugar Cane | |
| (4), 3-11 | |
| En | |
| En Es | |
| Early ripening sugar cane varieties are a prerequisite for i mproving sugar yields at the beginning of the harvest season in Mauritiu. In the present study various juice-quality estimators potentially related to earliness of ripening in sugar cane (Saccharum spp. L. ) were measured in unselected F1 progenies at three sampling dates: April (preharvest), July (early harvest) and October (mid-season harvest). These genotypes represented 12 families from biparental crosses between varieties with various ripening patterns (three each of early x early, early x late, late x early and late x late). Thrity two F1 clones of each family were studied. Differences between families were more significant at pre- and mid-season harvests than at early harvest. Significant differences between families in the linear effects over time (family x harvest interactions) were found for all the characters measured. All the quality characters gave moderate to high broad-sense and high narrow-sense heritability estimates at all three sampling dates and particularly at preharvest, indicating that sucrose content is highly heritable. Genetic correlations between quality characters were generally stronger at pre- and early harvests than at mid-season. Genetic advance following selection on the basis of field Brix was always positive in all but one case. The present results indicate that improvement in quality characters in sugar cane, in Mauritius, should be easier on the basis of selection in the preharvest period than on the basis of selection at a later date and that such selection should produce genotypes specifically adapted to early harvest. | |
| SUGARCANE EARLINESS BREEDING GENETICS SACCHARUM VARIATIONS INHERITANCE HERITABILITY GENETIC CORRELATION | |
| MAURITIUS | |
| Cane breeding and genetic improvement | |
| 1996-10-25 | |
| En | |
| LIB | |
| CAT | |
| PB |