Variation and inheritance of sucrose accumulation patterns and related agronomic traits in sugarcane families
| MSI05P4134 | |
| Badaloo, M. G. H. Ramdoyal, K. Nayamuth, A. R. H. | |
| Variation and inheritance of sucrose accumulation patterns and related agronomic traits in sugarcane families | |
| periodical article | |
| 2005 | |
| Proc. int. Soc. Sug. Cane Technol. | |
| 25 (2): 430-442 | |
| En | |
| En Fr Sp | |
| High sucrose accumulation is a desirable characteristic to compensate for sub-optimal sucrose content early in the harvesting season in Mauritius. Furthermore, with the centralisation of milling operations, there is a need to breed for precocious high sucrose cultivars that may be harvested much earlier to extend the harvest season. Studies on sucrose accumulation and on other physiological parameters were carried out on segegating seedling populations using 15 biparental crosses involving parents evaluated for their sucrose accumulation pattern. A number of quality traits were followed at the exponential growth phase (March) and at early harvest stage (July). height of primary and secondary tillers was recorded on four occasions during the tillering and growth phases. Families showed highly significant genetic differences for most quality and physiological characters at both sampling dates. narrow-sense heritability, estimated from biparental progeny analyses, was highest in march (0.12-0.82) for most quality characters compared to early harvest ().60-0.30). Primary tiller height showed higher heritability estimates compared to the secondary tiller height. Pronounced male effects were evident for some cane quality traits. In general, crosses which included an early ripening parent started sucrose accumulation earlier and accumulated a higher amount at the age of seven months compared to those involving late ripening parents. The late x late categories of crosses generally showed lower pol percent cane at both sampling dates compared to the other groups (middle/late x early). The genetic implications of these observations in relation to breeding and selection strategies for developing parents and cultivars with precocious and high sucrose accumulation pattterns are discussed. | |
| Sugarcane sucrose accumulation breeding heritability male effect selection ripening ripening patterns | |
| Mauritius | |
| Sugarcane: Cane breeding and genetic improvement | |
| Breeding: Breeding for earliness | |
| 2005-02-22 | |
| en | |
| LIB | |
| CAT | |
| PHYS PB |