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Article

Genetic Variability, Correlation among Agronomic Traits, and Genetic Progress in a Sugarcane Diversity Panel

1
Centro de Ciências Agrárias, Departamento de Biotecnologia e Produção Vegetal e Animal, Universidade Federal de São Carlos, Araras CEP 13604-900, São Paulo, Brazil
2
Departamento de Genética, Escola Superior de Agricultura Luiz de Queiroz, Universidade de São Paulo, Piracicaba CEP 13418-260, São Paulo, Brazil
3
Departamento de Biologia Vegetal, Instituto de Biologia, Universidade Estadual de Campinas, Campinas CEP 13083-862, São Paulo, Brazil
4
Centro de Biologia Molecular e Engenharia Genética, Universidade Estadual de Campinas, Campinas CEP 13083-862, São Paulo, Brazil
*
Author to whom correspondence should be addressed.
Academic Editors: Panagiotis Madesis and Irini Nianiou-Obeidat
Agriculture 2021, 11(6), 533; https://doi.org/10.3390/agriculture11060533
Received: 12 May 2021 / Revised: 2 June 2021 / Accepted: 2 June 2021 / Published: 9 June 2021
(This article belongs to the Special Issue Crop Breeding and Genetics)
Sugarcane breeding programs require 15 years of experimentation to create more productive cultivars, and estimates of genetic progress can indicate the efficiency of breeding programs. In this study, we used a diversity panel, the Brazilian Panel of Sugarcane Genotypes (BPSG), with the following objectives: (i) to estimate, through a mixed model, the adjusted means and genetic parameters of ten traits evaluated over three harvest years; (ii) to estimate genotypic correlation among those traits; and (iii) to estimate genetic progress over six decades of breeding. The heritabilities ranged from 0.43 to 0.88, and we detected 42 significant correlations, 9 negative and 33 positive. Over six decades, the sucrose-related traits BRIX, POL%C, and POL%J showed an average increase per decade of 0.27 °Brix, 0.26% and 0.31%, respectively. Stalk number, height, and weight of the plot, and cane and sucrose yields revealed average increases per decade of 3.27 stalks, 0.06 m, 9.42 kg, 11.22 t/ha, and 2.08 t/ha, respectively. The genetic progress of the main agronomic traits is discussed through a historical series of sugarcane genotypes present in the BPSG. The findings of this study could contribute to the management of new breeding strategies and allow for future studies of associative mapping. View Full-Text
Keywords: genetic progress; germplasm; mixed model; conventional breeding; yield potential genetic progress; germplasm; mixed model; conventional breeding; yield potential
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    Doi: 10.5281/zenodo.4891930
    Link: https://zenodo.org/record/4891930#.YLbHbKhKiUk
    Description: Table S1. Accessions names, ancestor germplasm or breeding germplasm (BP) and origin country of the 254 accessions of the Brazilian Panel of Sugarcane Genotypes (BPSG). Table S2. Selected models for the G_M matrix and number of estimated parameters (n_par) considering each trait separately. The Akaike (AIC) and Bayesian (BIC) information criteria were used to compare the structures of the variance-covariance matrix. The models for the G_M matrix were selected according to the lowest value of the BIC criterion for BRIX (in °Brix), sucrose content of the cane (POL%C, in %), sucrose content of the juice (POL%J, in %), fiber content (FIB, in %), stalk height (SH, in m), stalk number (SN), stalk diameter (SD, in mm), stalk weight of the plot (SW, in kg), cane yield (TCH, in t ha–1) and sucrose yield (TPH, in t ha–1) for BPSG over three harvest years (2014, 2015 and 2016). Bold numbers represent the smallest AIC and BIC values. Table S3. Spreadsheet with raw data for the 10 traits evaluated in the present study.
MDPI and ACS Style

Barreto, F.Z.; Balsalobre, T.W.A.; Chapola, R.G.; Garcia, A.A.F.; Souza, A.P.; Hoffmann, H.P.; Gazaffi, R.; Carneiro, M.S. Genetic Variability, Correlation among Agronomic Traits, and Genetic Progress in a Sugarcane Diversity Panel. Agriculture 2021, 11, 533. https://doi.org/10.3390/agriculture11060533

AMA Style

Barreto FZ, Balsalobre TWA, Chapola RG, Garcia AAF, Souza AP, Hoffmann HP, Gazaffi R, Carneiro MS. Genetic Variability, Correlation among Agronomic Traits, and Genetic Progress in a Sugarcane Diversity Panel. Agriculture. 2021; 11(6):533. https://doi.org/10.3390/agriculture11060533

Chicago/Turabian Style

Barreto, Fernanda Z., Thiago W.A. Balsalobre, Roberto G. Chapola, Antonio A.F. Garcia, Anete P. Souza, Hermann P. Hoffmann, Rodrigo Gazaffi, and Monalisa S. Carneiro. 2021. "Genetic Variability, Correlation among Agronomic Traits, and Genetic Progress in a Sugarcane Diversity Panel" Agriculture 11, no. 6: 533. https://doi.org/10.3390/agriculture11060533

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