Location: Sugarcane Field StationTitle: Juice Brix Values in Stages 1 and 2 of the CP Sugarcane Breeding Program as Affected by Genotype and Weather
|SANDHU, HARDEV - University Of Florida|
|Coto Arbelo, Orlando|
|DAVIDSON, WAYNE - Florida Sugarcane League|
|BALTAZAR, MIGUEL - Florida Sugarcane League|
Submitted to: American Society of Sugar Cane Technologists
Publication Type: Abstract Only
Publication Acceptance Date: 5/14/2021
Publication Date: 6/15/2021
Citation: Zhao, D., Gordon, V.S., Islam, M.S., Sood, S.G., Sandhu, H.S., Momotaz, A., Coto Arbelo, O., Davidson, W.R., Baltazar, M. 2021. Juice Brix Values in Stages 1 and 2 of the CP Sugarcane Breeding Program as Affected by Genotype and Weather. American Society of Sugar Cane Technologists. 41:4.
Technical Abstract: The Canal Point sugarcane breeding and cultivar development program (CP program) on muck soils includes six stages of Crossing, Seedling, and clonal Stages 1, 2, 3, and 4. Disease susceptibility and two other major agronomic traits are assessed directly in-field during the first clonal stage (Stage 1: ~10,000 clones from 300-400 families): plant vigor (early September) and juice Brix (early November). These data are analyzed and used to select individuals from Stage 1 for progression to Stage 2 (~1,500 clones), where sucrose yield and yield components are collected in late October. In this study, Stage 1 and 2 data of the CP program were analyzed over 11 years (2009-2019) to determine potential correlations of Stage 1 vigor and Brix with Stage 2 yield components. The coefficient of variation (CV) of vigor and cane yield related traits was much greater than that of Brix and commercial recoverable sucrose (CRS). The within family CV values for both vigor and Brix were greater than CVs among families. Although plant vigor in Stage 1 had relative low correlation with tonnage in Stage 2 (r = 0.143 – 0.209****, n = 900 to 1500), Stage 1 Brix was positively correlated with Stage 2 Brix, Pol, and CRS (r = 0.347 – 0.424****). There was no substantial change in Brix (Stage 1) or CRS (Stage 2) during the timespan examined. Differences in juice Brix values were negatively correlated with minimum temperature in July and August (r = -0.613 to -0.678*, n = 11) and amount of rainfall in October (r = -0.640*). These findings may help us better understand the challenges and likelihood of improving sucrose concentration in the CP programs.