|Kang, Manjit - PUNJAB AGRICULTURAL UVSTY|
Submitted to: American Society of Sugar Cane Technologists
Publication Type: Abstract Only
Publication Acceptance Date: May 20, 2008
Publication Date: December 1, 2008
Citation: Glaz, B.S., Kang, M.S. 2008. Abstract:Location Contributions Determined via GGE Biplot Analysis of Multienvironment Sugarcane Genotype-Performance Trials . American Society of Sugar Cane Technologists. Page-52 Technical Abstract: Technical Abstract: Selection for productive sugarcane (Saccharum spp.) cultivars in Florida has been more successful for organic than sand soils. The objectives of this study were to assess the contribution of the location with a sand soil in the final stage of multi-environment testing of sugarcane genotypes in Florida, and to identify locations with organic soils that, if replaced with a sand soil location, would be least likely to compromise cultivar selection for organic soils in Florida. Sixteen genotypes per location were harvested in two or three crop cycles from 2002 to 2005 at nine locations. Traits analyzed were cane and sucrose yields (Mg ha-1) and theoretical recoverable sucrose (g kg-1). Variations for genotypes, locations, crops, genotype x location (GL) interaction, and crop x genotype x location (CGL) interaction were highly significant for all three traits, but location usually was the largest contributor to variability in individual crop-cycle analyses. The location with a sand soil, Lykes, was generally not highly representative of locations or highly discriminating of genotypes. These results, in addition to the previously identified need to improve genotype selection on sand soils, suggest that it may be advantageous to add a location with sand soil to this testing program, although doing so may compromise genotype discrimination for theoretical recoverable sucrose (TRS) and sucrose yield. To sustain ability of the Florida sugarcane selection program to identify productive cultivars on organic soils while improving selection on sand soils, it was recommended to replace one location with muck soil (Osceola) with a sand-soil location.