A protocol for identifying breeding groups to select sugarcane genotypes (Saccharum spp.) according to sucrose accumulation curves

OSTENGO, S.; RUEDA CALDERÓN, M.A.; BRUNO, C.; CUENYA, M.I.; BALZARINI, M.

Sugar Tech

Springer India

Año: 2020

0972-1525

ucrose accumulation curves represent the maturity profile of sugarcane, which is considered as a character of interest for the selection of genotypes in breeding programs. However, variations due to the environment (E) and interaction between genotype and environment (G×E) may be confused with the effect of genotype (G) and hinder the selection process of promising clones. The objective of this study was to identify a group of accumulation curves with high intra-group genotypic variability in the sucrose accumulation process throughout several E. This breeding group is then used to select genotypes according to their maturity profile. A protocol is presented whereby the following statistical tools are integrated: (i) classification of non-linear accumulation curves according to parameters associated with the beginning of the maturity process, sucrose accumulation rate and the time elapsed until the accumulation rate decreases, (ii) estimation of the genotypic contribution to intrag