Desempenho de famílias de cana-de-açúcar em diferentes fases no melhoramento genético via REML/BLUP

Lucius, Ana Selena Fernandez; Oliveira, Ricardo Augusto de; Daros, Edelclaiton; Filho, João Carlos Bespalhok; Verissimo, Mario Alvaro Aloisio

doi:10.5433/1679-0359.2014v35n1p101

Cited by 7 publications

(7 citation statements)

References 4 publications

(4 reference statements)

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“…Although 32 clones were selected, it is important to note that as reported by Lucius et al (2014), mass selection can eliminate clones selected by the indices, as some clones may have disease symptoms and/or other undesirable traits such as physiological pith flowering, susceptibility to pests, lodging, or excessively protruding buds; i.e., if necessary, some previously selected clones can be eliminated. Another important factor is that when a particular index is chosen, the selection efficiency as well as the estimated heritability depends on the population to be improved (Pedrozo et al, 2009).…”

Section: Direct Selection (Ds) Smith and Hazel (Sh) Mulamba And Mocmentioning

confidence: 99%

Comparison between different selection indices in energy cane breeding

Azeredo¹,

Bhering²,

Brasileiro³

et al. 2017

Genet. Mol. Res.

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ABSTRACT. Sugarcane breeding programs have been adapting to a new market demand: aside from high sucrose yield per hectare, the sector needs new cultivars with higher fiber percentages. The selection of sugarcane clones based on phenotype alone is a complex task. The selected clones should display high performance in a series of yieldand quality-related traits. Selection indices can provide information about which clones can best combine the traits of agronomic interest. In this study, different selection indices were evaluated in a population of 220 clones. The following traits were evaluated: weight of 10 stalks with straw, weight of 10 stalks with no straw, tons of cane per hectare with straw, tons of cane per hectare with no straw, sucrose content, fiber percentage, and tons of fiber per hectare. The selection indices of Smith (1936) and Hazel (1943) and Mulamba and Mock (1978), the base index (Williams, 1962), and the index of Pesek and Baker (1969) were used. The selection index of Mulamba and Mock (1978) without economic weight estimates, the index of Mulamba and Mock with economic weights based on heritability, and the index of Pesek and Baker (1969) with the desired gains based on genetic standard deviations were efficient for the selection of energy cane clones with good fiber yield, sucrose content, and tons of cane per hectare.

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Section: Direct Selection (Ds) Smith and Hazel (Sh) Mulamba And Mocmentioning

confidence: 99%

Comparison between different selection indices in energy cane breeding

Azeredo¹,

Bhering²,

Brasileiro³

et al. 2017

Genet. Mol. Res.

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“…Genetic parameters are essential for the correct selection of superior individuals (Pereira et al, 2013). According to Lucius et al (2014), heritability (h 2 ) is one of the most important genetic parameters for the breeder and quantifies the fraction of phenotypic variance that is inheritable, i.e., genotypic nature (Rodrigues et al, 2013).…”

Section: Resultsmentioning

confidence: 99%

Use of the REML/BLUP methodology for the selection of sweet orange genotypes

Capistrano

Neto

Santos

et al. 2021

Pesq. agropec. bras.

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The objective of this work was to select superior sweet orange (Citrus sinensis) genotypes with higher yield potential based on data from eight harvests, using the residual or restricted maximum likelihood/best linear unbiased prediction (REML/BLUP) methodology. The experiment was carried out from 2002 to 2008 and in 2010 in the municipality of Rio Branco, in the state of Acre, Brazil. Analyzes of deviance were performed to test the significance of the components of variance according to the random effects of the used model, and parameters were estimated from individual genotypic and phenotypic variances. A selection intensity of 20% was adopted regarding genotypic selection, i.e., only the best 11 of the 55 genotypes tested were selected. The estimates of the genetic parameters show the existence of genetic variability and the selection potential of the studied sweet orange genotypes. The genotypic correlation between harvests is of low magnitude, except for the variable average fruit mass, and, as a reflex, there is a change in the ordering of the genotypes. Genotypes 5, 48, 19, 14, and 47 stand out as being the most productive, and, therefore, are the most suitable for selection purposes. Genotypes 14 and 47 show superior performance for the character set evaluated.

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“…Otherwise, BLUP AUS is not efficient, and mass selection is practiced. In agreement, Brasileiro (2013), Castro (2012), Moraes, Bastos, Filho, Melo, and Reis (2010), Oliveira, Daros, and Filho (2008), and Lucius, Oliveira, Daros, Filho, and Verissimo (2014) studied efficiency and performance of family selection in sugarcane; in all cases, the family selection method was superior to mass selection, in cases where the CV g values were on the order of 18 and 36% for TCH, respectively. For TBH, CV g values on the order of 45.87 and 36.44% were obtained in studies conducted by Moraes et al (2010), Oliveira et al (2011), and Oliveira et al (2013).…”

Section: F I G U R Ementioning

confidence: 99%

Comparison of different selection methods in the seedling stage of sugarcane breeding

et al. 2020

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Family selection is an important procedure to be considered in the early stage of sugarcane (Saccharum spp.) breeding. Different approaches are available, but few comparative studies are performed in practice. The aim of this study was to evaluate the potential genetic gain when different selection strategies at early sugarcane breeding stages are considered. Two experiments involving the first and second selection stages of the Sugarcane Breeding Program of RIDESA/UFSCar were performed. In the first stage, three selection methods based on the concept of selection between and within families were applied to predict the highest genetic gain, that is, BLUPi: simultaneously contemplates family and individual information for selection; BLUPis: promotes the dynamic allocation of individuals to be selected in each family; BLUP AUS : identifies high potential families and establishes differentiated selection intensities; additionally, mass and random selection methods were also performed. In the second stage, the selected clones were evaluated to compare the realized genetic gain. In the first stage, BLUP AUS had the highest predicted gain from selection (P GS; 12.7%) in tonnes of Pol per hectare (TPH). The BLUPis was highly correlated with BLUP AUS and was efficient. Moreover, BLUPi proved to be economically impracticable since phenotypic evaluations must be performed at the individual level. Family selection via BLUP AUS was equivalent to mass selection probably due to the low coefficient of genetic variation (CV g ≤ 15) among the families. However, the family selection strategy provides extra information for breeders that cannot be ignored; the possibility of studying the combining ability of genotypes for identifying promising parents for future cross combinations.

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Desempenho de famílias de cana-de-açúcar em diferentes fases no melhoramento genético via REML/BLUP

Cited by 7 publications

References 4 publications

Comparison between different selection indices in energy cane breeding

Comparison between different selection indices in energy cane breeding

Use of the REML/BLUP methodology for the selection of sweet orange genotypes

Comparison of different selection methods in the seedling stage of sugarcane breeding

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