Abstract
The objective of this work is to evaluate the adaptability and phenotypic stability of the RB sugarcane genotype using the AMMI method. The experiments were performed in five production units in the state of Pernambuco, in cultivars of sugarcane soca and ressoca, using 14 RB sugarcane genotypes—11 RB clones of series 2004 and three cultivars as controls. Each combination of production unit × cutting was considered as environment, for a total of 13 environments. The experimental design was with random blocks, and four repetitions. We estimated the parameters tons of sugarcane per hectare (TCH) and tons of pol per hectare (TPH). The genotype G12 displayed general adaptability, phenotypic stability and high productivity for the two parameters. The genotypes G10, G13 and G14 had the highest yield, largest contribution of G×E, indicating specific adaptability. The environments A12 and A13, in Primavera, are recommended for preliminary selection trials.
Highlights
Brazil has been the world’s largest producer of sugarcane for the last 30 years (FAO, 2015)
The influence of the interaction (G×E) on the performance of the genotypes is of utmost importance, knowing that each genotype has an inherent capacity to respond to environment to environment changes (Pinto et al, 2011)
The experiments were performed in five production units in Zona da Mata de Pernambuco, with cane plantings soca and ressoca
Summary
Brazil has been the world’s largest producer of sugarcane for the last 30 years (FAO, 2015). The production of sugarcane anticipated for the 2017/2018 season is 647.6 million tons of cane, 38.7 million tons of sugar and 26.45 billion liters of ethanol (CONAB, 2017) Such results are mainly due to the genetic improvement of the species and the identification of genotypes with better productivity, high quality and adapted to the diverse edaphoclimatic conditions (Silva et al, 2011). The influence of the interaction (G×E) on the performance of the genotypes is of utmost importance, knowing that each genotype has an inherent capacity to respond to environment to environment changes (Pinto et al, 2011) This phenomenon represents a barrier to selection and to cultivar guidance (Andrade et al, 2013). In order to minimize such effects, breeders have to provide guidance for cultivars with large adaptability and good stability—or regional guidance—since positive interaction associated with environmental predictability represents an opportunity for commercial use (Vasconcelos, Reis, Cruz, Sediyama, & Scapim, 2010)
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