Breeding for multi-purpose sugar cane varieties: application of multivariate techniques
| MSI11P4590 | |
| Santchurn, D Ramdoyal, K Badaloo, G H Labuschagne, M T | |
| Breeding for multi-purpose sugar cane varieties: application of multivariate techniques | |
| ISSCT 10th Germplasm and Breeding and 7th Molecular Biology Workshop: "Breaking breeding and biotechnology paradigms - towards a complementary approach in sugar cane research, Maceio, Brazil, 15 - 20 May 2011 | |
| Conference paper | |
| 2011 | |
| Abstract only | |
| EN | |
| En | |
| The recent revision of EU sugar price entailing a cut of 36 per cent has compelled ACP member states to restructure their respective industries to ensure viability and sustainability. Additionally, with an anticipated increase in the price of fossil fuel, sugarcane with its high biomass potential is increasingly recognised as a stock material for a wide range of products but mainly for sugar, ethanol and electricity through cogeneration. The Mauritius Sugar Industry Research Institute has thus widened its scope to include a component for the production of different types of canes including the multi-purpose types. About 8-10 per cent of the seedlings is produced each year for the interspecific programme and includes the 1st generation crosses, F1, the 1st generation backcross, BC1, and the 2nd generation backcross, BC2. These are routinely screened to identify different types of high biomass and fibre varieties. Additionally a collection of 60 genotypes that were present in the germplasm collection were pre-selected based on morphological attributes and evaluated in five series of trials - 2 x 5m rows x 3 replicates - over a plant cane and first ratoon crops in a sub-humid, partially irrigated environment. The test genotypes included F1 (22), BC1 (30) and BC2 (6), Erianthus clones (2) and most of the crosses were made with commercial parents as the recurrent parent. A wide range of morphological attributes, cane biomass and quality characters were measured and the data were subjected to multivariate data analyses (MVDA). Spatial analysis techniques were used to obtain precise and comparable means of all the genotypes planted in the five series of trials. Principal component analysis (PCA) compressed the different characters into five major Principal Components (PCs). The first two explained 77 per cent of total variation. PC1 emphasised on the cane quality traits while PC2 stressed on biomass characters. Cluster analysis defined six major groups in the population. Candidates from three of them were found suitable for either sugar, fibre, or both as the main end-products and these were promoted to the final phase evaluation trials. The results also showed that, while high fibre varieties could be produced from wild and F1 clones, high biomass varieties were obtainable from any of the different generations. Based on variations in cane quality and biomass traits, four types of canes with different levels of Pol and fibre have been defined for multiple uses: Type 1 (commercial), Type 2 (commercial with enhanced fibre), Type 3 (multi-purpose high fibre), and Type 4 energy canes (fibre > 22 per cent for cogeneration). A selection algorithm has been developed that identified 11 potential high biomass genotypes. The selection index has been extended to the whole selection programme for classifying new sugarcane varieties as from the third clonal stage, where 420 genotypes are routinely evaluated in the first replicated trials. | |
| sugarcane breeding Biomass high fibre varieties interspecific crosses selection index | |
| Maurituis | |
| Cane breeding and genetics | |
| Breeding: Methods: Policies and methods | |
| 2011-10-10 | |
| En | |
| PB |