Características físico-químicas do grão de cultivares de arroz em função da adubação nitrogenada

Mingotte, Fábio Luíz Checchio; Hanashiro, Renata Kimie; Filho, Domingos Fornasieri

doi:10.5433/1679-0359.2012v33supl1p2605

Cited by 12 publications

(11 citation statements)

References 10 publications

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“…The Brazilian consumer expects fast cooking, where the grains expand well in volume and are loose, dry, and soft after cooking. Moreover, after cooled and reheated, these standards are generally maintained when there is an intermediate amylose content (CONAB, 2015;Mingotte, Hanashiro, & Fornasieri Filho, 2012). In the present study, considering the characteristic in question, there was a significant difference between lines, but all were classified as intermediate (20% to 25% of amylose), being in agreement with the national preference, being the lowest observed content of 20.8 % and the highest 22.5%.…”

Section: Resultssupporting

confidence: 72%

Selection Strategies for Grain Quality in Upland Rice Lines

Neto¹,

Castro²,

Silva³

et al. 2019

JAS

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The grain quality in rice is extremely important for breeding programs, in order to select lines that meet the standards demanded by the market. The quality attribute is composed by several characteristics, which can make difficult the work for breeder. Thus, the objective in this study was to verify the efficiency of the selection indexes in order to select upland rice lines that meet the grain quality standards. Fourteen lines of the Cultivation and Use Value test (CUV) of the upland rice breeding program of the Federal University of Lavras were evaluated. The experiments were conducted in the municipalities of Lavras-MG and Lambari-MG in the seasons of 2015/2016 and 2016/2017. The experimental was a randomized block design with three replications. The following characteristics were evaluated to compose the indexes: grain yield, minimum cooking time, water absorption index, grain chalkiness, integer grain percentage, grain length and width, apparent amylose content and gelatinization temperature. The following selection indexes were compared: Base index of Willians, Sum of “Ranks” of Mulamb and Mock, and Index Sum of Standardized Variables (Z Index) and also was held direct selection through grain yield. It was observed that the Base index obtained good gains with the selection for grain yield, but it was inefficient for the quality characteristics, results when used direct selection. The Ranks and Z index obtained superior and balanced gains for the characteristics, showing up more efficient in the selection of upland rice lines aiming at the quality of grains.

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Section: Resultssupporting

confidence: 72%

Selection Strategies for Grain Quality in Upland Rice Lines

Neto¹,

Castro²,

Silva³

et al. 2019

JAS

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“…In the process of marketing rice, it is necessary to consider specific requirements of the various segments involved in the production and commercial processes of that cereal. It is possible to highlight the physical quality of the grain expressed by income in the processing, grain yield, size, and appearance (Mingotte et al, 2012). Another important physical property related to rice grain quality is translucency (Edwards et al, 2017).…”

Section: Introductionmentioning

confidence: 99%

Genetic progress of grain quality of flooded-irrigated rice cultivars in the state of Rio Grande do Sul, Brazil

Streck

Júnior

Aguiar

et al. 2018

Pesq. agropec. bras.

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The objective of this work was to determine the genetic progress of grain quality attributes of flooded irrigated rice (Oryza sativa) cultivars in the state of Rio Grande do Sul, Brazil, between 1972 and 2016. The genetic estimates followed an approach based on the comparative analysis of 25 cultivars released by Embrapa’s breeding program over this period. The experiment was implemented in four producing regions of the state of Rio Grande do Sul: Sul, Campanha, Planície Costeira Interna, and Planície Costeira Externa. The following significant genetic gains were observed: 0.20% per year, for percentage of whole grains after processing; -1.38% per year, for percentage of chalky kernels and white-core grains; -0.77% per year, for total chalky area; -0.08% per year, for total whiteness; and -0.82% per year, for non-vitreous grain whiteness. Most cultivars released have high amylose content and a low gelatinization temperature. Therefore, the breeding program presented significant annual genetic progresses between 1972 and 2016 for the main attributes of grain quality, and made cultivars available according to the national demand for grain quality in the several segments of the rice production industry.

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“…The N is one of the main nutrients involved in productivity (FAGERIA; BARBOSA FILHO, 2001;BALIGAR, 2005;MINGOTTE et al, 2013) and in improving the nutritional grain quality of rice (MINGOTTE et al, 2012;CHEN et al, 2012). It is the second macronutrient required by rice plants (103 kg of N to produce 3 t of grains ha -1 ) and the first in harvest exportation (34 kg of N t -1 of grains) (MALAVOLTA et al, 1997;FORNASIERI, 2006;MINGOTTE et al, 2014).…”

Section: Introductionmentioning

confidence: 99%

Agronomic efficiency and grain quality of upland rice cultivars as a function of nitrogen topdressing

Mingotte¹,

Gonçalves²,

Yada³

et al. 2015

Biosci. J.

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ABSTRACT:This study aimed to evaluate the agronomic efficiency and grain quality of rice cultivars as a function of nitrogen application in upland conditions with supplemental sprinkler irrigation. The experiment was carried out in 2012/13 at Jaboticabal-SP on a randomized block and split plots design with four replications. The plots were composed of twelve rice cultivars (BRS Aroma, BRS Monarca, BRS Primavera, BRS Sertaneja, BRSMG Curinga, Caiapó, CIRAD 141, Guarani, IAC 165, IAC 201, IAC 202, and IAC 25), and two levels of nitrogen application (0 and 100 kg of N ha -1 ) in topdress at the R 1 stage (panicle differentiation) as subplots. The N application intensifies the degree of lodging, mainly at Caiapó, Guarani, IAC 165, IAC 201 and IAC 25 cultivars. The N application affects the number of sterile spikelets per panicle, mainly in CIRAD 141, BRS Sertaneja, IAC 202, and BRS Aroma cultivars. Caiapó cultivar shows higher grain yield and agronomic efficiency in function of N application, followed by BRS Monarca, BRSMG Curinga, IAC 165, and IAC 202. Although Caiapó, CIRAD 141, Guarani, IAC 165, IAC 202, and IAC 25 cultivars present better results, all the others cultivars also present acceptable values of milling yield, without N application effects. The grain protein content in rice is increased by the N topdressing application.

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Características físico-químicas do grão de cultivares de arroz em função da adubação nitrogenada

Cited by 12 publications

References 10 publications

Selection Strategies for Grain Quality in Upland Rice Lines

Selection Strategies for Grain Quality in Upland Rice Lines

Genetic progress of grain quality of flooded-irrigated rice cultivars in the state of Rio Grande do Sul, Brazil

Agronomic efficiency and grain quality of upland rice cultivars as a function of nitrogen topdressing

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