Use of historical multi-location sugarcane variety trials data to identify relationships among environments in terms of genotype response
| MSI10P4471 | |
| Bissessur, D. Ramnawaz, C. Ramdoyal, K. | |
| Use of historical multi-location sugarcane variety trials data to identify relationships among environments in terms of genotype response | |
| periodical article | |
| 2010 | |
| Proc. int. Soc. Sug. Cane Technol. | |
| 27: 9 p. | |
| En | |
| En | |
| IN MAURITIUS, sugarcane is grown over diverse environments that can be grouped into three main zones: the Superhumid, Humid and Subhumid. In each zone, multi-location variety trials are established with several genotypes to provide reliable information for identifying high yielding varieties. Genotypex Environment (G x E) interaction is the major complicating element in selecting genotypes suitable for commercial production. However, one of the difficult aspects of conducting trials in several environments is the choice of test sites. It is important to plan a rational variety-testing program with confidence. Available historical data were used from four series of final phase trials established in different years to study the main effects environment (E) and genotype (G) as well as Gx E interactions. The aim was to identify relationships among test sites in terms of genotype responses and to assess the extent to which environments were similar or different. Cumulative results of a plant crop and three ratoon crops for cane yield (TCH) were analysed. In the superhumid zone, located at high elevation, Gx E interaction was not important within the rocky (B) and the deep free (F) soils. In contrast, a significant Gx E interaction was observed within B and F soils for locations lying in relatively higher and lower elevations in different sectors. Similarly, among locations in the Humic Latosols (H2) soils and between H2 and L2 soils, interaction was not prominent. Furthermore, the B, F and H soils were found to be the cause of different genetic responses. In the subhumid zone, a highly significant Gx E interaction was found between all the Low Humic Latosols (L1, L2) and the Latosolic Reddish Prairie soils (P2 and P3). The study confirmed that trials should be established in B, F, L and P soils mainly but should be replicated within the B and F soils prevailing in the different sectors of the island | |
| Sugarcane breeding AMMI yields genotype x environment interaction multi-location trials | |
| Mauritius | |
| Cane breeding and genetics | |
| Experimental design | |
| 2010-03-17 | |
| EN | |
| LIB | |
| CAT | |
| PB Biom |