Effects of the environment on components of yield in seedlings from five Saccharum crosses
| MSI99P0995 | |
| George, E. F. | |
| Effects of the environment on components of yield in seedlings from five Saccharum crosses | |
| Periodical article | |
| 1960 | |
| Proc. int. Soc. Sug. Cane Technol. | |
| 10, 755-765 | |
| En | |
| En | |
| Seedlings of five crosses made in the course of the normal breeding programme were planted at each of four experimental stations situated in contrasting climatic zones of the Island, with average rainfall ranging from 50 inches to 125 inches. In a preliminary study the population of seedlings from each cross was examined during 1958 at similar times at each of the four places, and the characters, number of tillers, length of longest stem, average diameter of stem, and yield in plant cane, were recorded for each seedling. The distribution curves show that differences due to genotype are consistent and indicate the selection potential of each cross. Although populations of different genetic constitution reacted differently, the overall response to a particular environment was the same for all. It was possible to separate variances which gave a general estimate of the relative effects of genotype and environment and hence heritability estimates have been calculated for each of the characters examined. Correlations between the characters studied are given. On a population basis the relationship between mean length and mean yield is shown to depend on environment while between mean tiller number and mean yield a llinear relationship is found within each cross. The practice in a breeding programme of planting seedlings at outstations is discussed in the light of these findings and a case presented for a progressive system of mating and progeny testing. | |
| SUGARCANE ENVIRONMENTAL FACTORS YIELDS RESISTANCE BREEDING VARIETIES | |
| MAURITIUS | |
| Cane breeding and genetic improvement | |
| 1992-05-26 | |
| En | |
| Mauritius Sugar Industry Research Institute | |
| LIB | |
| CAT | |
| PB |