Title 1 : Sugarcane Breeding in Thailand
Summary:
Sugarcane is an important economic crop in Thailand. There are planting area about 1 million hectare that cane yield production about 60-70 million ton a year. More than 30 Thai sugarcane varieties were made from the three government organization, viz. Office of Cane and Sugar Broad (OCSB), Deparment of Agriculture (DOA), and Kasetsart University. There was the Tiphuyae Sugarcane Crossing Station at Thongpaphum District, Kanchanaburi. This station were used to collecting all of cane germplasm (sugar-cane, energy-cane, and forage-cane) more than 2,500 clones in Thailand. It is the best station for sugarcane flowering that having 99% of the total clones. The several important procedures in breeding program including parents selection, hybridization, seed and seedling management, selection, yield trial, and variety recommendation.

Title 2 : Genotype x Environment Interaction in Sugarcane Multi-Environmental Yield Trials in Central and Western Regions of Thailand
Summary:
The central and western growing regions about 30% of the total area covering 17 provinces were both irrigated and rainfed area. Water supply is a mainly limited factor for sugarcane yield, therefore, both areas have a very highly different in cane and sugar yield. Variety trial experiments are one of some important steps in plant breeding program. There are routinely conducted to compare several genotypes in multiple environments (sites, seasons, years), resulting in the two-way table of genotype x environment (GE) interaction. Our objectives were to (i) examined the interrelationship among test sites that importance to selecting appropriate test sites to making the next yield trial experiments., (ii) used GGE biplot technique to summarize the effects of genotype and genotype x environment interaction, and to address the question of “which won where” in multi-environmental yield trial experiments., (iii) explored the association of genotype x trait and trait x environment in each test site and across test sites., and (iv) interpreted the genetic covariate (of sugar yield) by environment.