Genetic parameters and performance of sugarcane families under cold stress in the South of Brazil

Verissimo, Mario Alvaro Aloisio; Oliveira, Ricardo Augusto de; Silva, Sérgio Delmar dos Anjos e; Daros, Edelclaiton; Härter, Adílson

doi:10.1590/s0100-204x2018000500007

Cited by 9 publications

(3 citation statements)

References 16 publications

(22 reference statements)

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“…Deviance analysis revealed significant differences between genotypes for productivity traits, evaluated during four harvest cycles. These results indicate genetic variability between genotypes concerning the evaluated traits, implying the possibility of selecting superior genotypes, as previously found (14,26).…”

Section: Resultssupporting

confidence: 86%

Mixed modeling for fiber yield genetic selection in sugarcane

et al. 2021

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The current demand for clean and renewable energy has provoked considerable changes in the production system of agroindustrial companies. The generation of bioelectricity through the burning of sugarcane bagasse has considerably risen in the recent years. This work aimed to focus on the sugarcane genotypes selection for fiber productivity. The experiment was outlined in randomized blocks with four repetitions, and sixteen genotypes were evaluated. The evaluated traits were: cane tons per hectare, sucrose tons per hectare, fiber tons per hectare, fiber content and apparent sucrose content. To the selection, the mixed linear models methodology was used. The heritability coefficients suggest a significant genetic gain and the harmonic means of relative performances of predicted genotypic values allowed the identification of stable genotypes related to the traits evaluated in four harvest cycles. Considering the current average demand of sugarcane agroindustry for varieties with fiber content between 12% and 17% and sucrose content near 13%, for energy generation and sugar production, the genotypes EECAC 06, EECAC 03, EECAC 04 and EECAC 07 are presented as commercial cultivation options. Highlights - Mixed models constitute an efficient tool for sugarcane selection focused onto fiber and sucrose production. - This methodology provides significant genetic gains based on predicted genetic values free from interaction with harvest cycles. - The evaluated genotypes present high fiber and sucrose productivity, genotypic adaptability and stability throughout harvest cycles, indicating longevity in the sugarcane crop.

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Section: Resultssupporting

confidence: 86%

Mixed modeling for fiber yield genetic selection in sugarcane

et al. 2021

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“…(2013) and Verissimo et al. (2018), in a study with several full‐sib families of sugarcane, observed greater genetic gains for TSH and TBH and smaller gains for BRIX.…”

Section: Resultsmentioning

confidence: 93%

Comparison of family selection methodologies used in the initial phase of sugarcane breeding

et al. 2022

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The simplified system (SS) is a new method of selecting families in the first experimentation phase used in some sugarcane (Saccharum officinarum L.) breeding programs in Brazil. In the SS, clones are obtained from families whose genotypes are not individualized in the field. Such selected clones are used to compose the cloned family trial. In the conventional method (CM) of breeding, each genotype is individualized to form part of the family evaluation experiment. This work aimed to compare and verify if the SS provides genetic information at least similar to the CM. Two experiments were conducted, one for the CM and the other for the SS. Sixty full‐sib families were evaluated in each experiment. The characteristics evaluated were average stalk height, average stalk diameter, the content of total soluble solids (BRIX), the number of stalks per meter, average stalk mass, tonnes of stalks per hectare, and tonnes of BRIX per hectare. The mixed model methodology was used to estimate the genetic parameters and predict the families' genotypic values. Both methods enabled high precision in the evaluation of families and similar average genetic gains (10.1% for CM and 9.6% for SS). The SS makes it possible to select families with high genotypic value, high accuracy, and genetic gains comparable to the CM. Therefore, although the SS presents similar results as the CM, its simplicity and ease of being installed in the field in a smaller experimental area make it a promising methodology for selecting cloned families in a sugarcane breeding program.

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“…Mainly in the first test phase (T1) from 2012 and 2013, severe frosts were recorded, killing seedlings in the experiment. The seedling response to cold tolerance was evaluated on a scale of apical bud (meristalk) survival (ABS) as proposed by Verissimo et al (2018). Thirty days after the first frosts, the scores were applied according to the survival rate and stalk lesion (measured with a graduated ruler, in mm), being: Score1 (Sc1) -dead apical bud and necrotic lesion (length>5.0 cm) below the apical bud caused by cold, and dead/absent lateral shoots; Score 2 (Sc2)dead apical bud, but with lesion immediately below the bud (2.0 -5.0 cm), visible lateral shoots; Score 3 (Sc3) -dead apical bud, with lesion below the bud (0.5 -2.0 cm), abundant lateral shoots; Score 4 (Sc4) -apical bud with small lesion (<0.5 cm) and presence of live tissue with growth return in the central axis of the stalk and without visible lateral shoots; Score 5 (Sc5) -live bud, with no visible lesion and no lateral shoots.…”

Section: Methodsmentioning

confidence: 99%

Selection of sugarcane families and clones under cold stress

et al. 2020

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The purpose of this study was to select cold-tolerant sugarcane families and clones. Evaluations were carried out during three selection phases in the municipality of Pelotas, state of Rio Grande do Sul, Brazil. The experiments were arranged in an incomplete block design, with initially 4,452 seedlings of 53 full-sib families. Aside from the traits soluble solids content (BRX), tons of stalks per hectare (TSH) and tons of brixper hectare (TBH), the survival of the apical bud (ABS) was evaluated in the first selection stage (T1) of the breeding program. At the end of three selection phases, 15 clones of 14 of the 53 families evaluated in the first phase (T1) were selected for the experimental phase. Of these, the clones RS/PR126066, RS/PR126044, RS/PR126052, RS/PR126007 and RS/PR126033, had a good performance for apical bud survival in the first selection phase.

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Genetic parameters and performance of sugarcane families under cold stress in the South of Brazil

Cited by 9 publications

References 16 publications

Mixed modeling for fiber yield genetic selection in sugarcane

Mixed modeling for fiber yield genetic selection in sugarcane

Comparison of family selection methodologies used in the initial phase of sugarcane breeding

Selection of sugarcane families and clones under cold stress

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