Industrial Quality

Júnior, Ariano Martins de Magalhães; Streck, Eduardo Anibele; Aguiar, Gabriel Almeida; Facchinello, Paulo Henrique Karling

doi:10.1007/978-3-030-37510-2_3

Cited by 3 publications

(2 citation statements)

References 49 publications

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“…Specifically for whole grains, as a percentage unit, the following estimates of very satisfactory genetic gains were obtained: greater than 3.0% in F3, approximately 1.0% in F4, and greater than 2.0% in F5. These estimates show a significant increase, providing interesting genetic gains with selection carried out in early generations, mainly the increment of mill yields (whole and broken grains), essential for the industry and particularly for growers who suffer from price discounts when a minimum of 58% whole grains is not reached in a sample of paddy rice, as required by Brazilian legislation (Magalhães Júnior et al, 2020).…”

Section: Resultsmentioning

confidence: 99%

“…In Brazil, consumers have a preference for long, fine, and glassy grains (without chalky areas) that are mostly not broken or damaged (Rosa et al, 2021). Growers and cerealists seek an adequate processing, good whole grain yields, low breakage rate during grain processing, minimal damage to the product's market value, and high acceptance of new cultivars (Magalhães Júnior et al, 2020).…”

Section: Introductionmentioning

confidence: 99%

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Predicted genetic gains weighted by selection pressures for grain quality in irrigated rice

Facchinello

Carvalho

Streck

et al. 2021

Pesq. agropec. bras.

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The objective of this work was to analyze components of variances and heritabilities, estimate selection gain, and evaluate the different selection pressures for physical quality attributes of grains of families of segregating generations of irrigated rice (Oryza sativa), through the REML/BLUP methodology. The experiment was conducted in the state of Rio Grande do Sul, Brazil, where selections were made in the F3, F4, and F5 segregating generations, in the 2015/2016, 2016/2017, and 2017/2018 crop seasons, in eight segregating populations (families) from different crosses. Intrinsic physical quality attributes, genetic parameters, and response to selection were evaluated using different selection pressures. The obtained estimates showed genetic gains for the characters related to grain quality, mainly for total chalky area, vitreous whiteness, total whiteness, ratio between vitreous whiteness and total whiteness, and percentage of whole grains and broken grains, in selections in early generations. The used families show satisfactory results, being superior to the control cultivars. For most characters, the estimates of broad-sense heritability are considered intermediate, together with the other parameters, showing the possibility of genetic selection for grain quality attributes. The response to selection with a pressure of 10% is very promising for rice grain quality attributes.

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Section: Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Predicted genetic gains weighted by selection pressures for grain quality in irrigated rice

Facchinello

Carvalho

Streck

et al. 2021

Pesq. agropec. bras.

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Gene action and genetic parameters of characters related to rice grain quality

Facchinello¹,

Carvalho

Streck

et al. 2021

Agronomy Journal

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Information about gene action, heritability, heredity, and potential gain estimated by selecting these characters is scarce. This study aims to estimate genetic parameters related to physical attributes of rice (Oryza sativa L.) grain quality. The crosses “BR/IRGA 409″ × “BRS Bojuru” and their reciprocal were performed, obtaining F1 and F2 generations and backcrosses (BC1 and BC2). After obtaining seeds, the experiment was conducted following a completely randomized design with replications determined by the total number of plants of each generation. Total chalky area (CA), white core (WC), vitreous whiteness (VW), caryopsis length (CL), caryopsis width (CW), caryopsis length × width (CL/CW), percentage of whole grains (WHO), and broken grains (BG) were evaluated. The experiment analyzed means and variances and genetic parameters of generations based on a complete model and additive‐dominant model. The physical attributes are inherited quantitatively, and the main genetic effect is the additive. However, there is a great environmental influence on the characters studied. The BR/IRGA 409 × BRS Bojuru cross makes it possible to obtain a greater genetic gain in the selection of chalky grain characters (CA, WC, and VW) as they express a narrower heritability, whereas BRS Bojuru × BR/IRGA 409 makes it possible to obtain a greater genetic gain in the selection of CL, CW, CL/CW, WHO, and BG. Parent plants affect the type of gene action. A gene action of partial dominance, overdominance, and complete dominance occurred among the physical attributes of grain quality.

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Genetic trends and multivariate interrelationships for grain quality of irrigated rice genotypes

Facchinello,

Carvalho,

Streck

et al. 2023

Agron. Sci. Biotechnol.

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For genetic improvement programs, researches with multivariate approaches in rice are fundamental, to define genetic trends, clusters and correlations of agronomic characters that together help selection procedures. This work aimed to reveal the agronomic performance, trends and genetic interrelationships of grain quality based on multivariate models applied to elite lines of irrigated rice. The experiment took place in the 2017/2018 harvest, held at Estação Experimental Terras Baixas (ETB), of Embrapa Clima Temperado. The study used randomized blocks design, with three replications. There were fifteen F6 lines and four control cultivars. Evaluation of intrinsic physical quality attributes with the aid of S21 grain statistical analyzer, as well as grain yield and mill yield (whole and broken grains). Performance of analysis of variance, genetic parameters and Scott Knott cluster test, linear correlation, canonical correlations, cluster analysis via generalized Mahalanobis distance, using the Toucher method, in addition to BIPLOT principal component analysis. The results showed that PH18502 and PH18701 strains presented better agronomic performance for the studied characters, by univariate analysis. The linear and canonical correlations presented demonstrate potential in the direction of selection of multiple characters and point to the possibility of indirect selection among the relevant agronomic characters for the production chain of irrigated rice.

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Industrial Quality

Cited by 3 publications

References 49 publications

Predicted genetic gains weighted by selection pressures for grain quality in irrigated rice

Predicted genetic gains weighted by selection pressures for grain quality in irrigated rice

Gene action and genetic parameters of characters related to rice grain quality

Genetic trends and multivariate interrelationships for grain quality of irrigated rice genotypes

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