Adaptability and stability of flood-irrigated rice cultivars released to the subtropical region of Brazil

Streck, Eduardo Anibele; Júnior, Ariano Martins de Magalhães; Fagundes, P. R. R.; Aguiar, Gabriel Almeida; Facchinello, Paulo Henrique Karling; Oliveira, Antônio Costa de

doi:10.1590/s0100-204x2018001000007

Cited by 4 publications

(3 citation statements)

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“…For many years, the genetic breeding of the rice crop ( Oryza sativa L.) has been responsible for the release of cultivars with ever higher yield potential (Botelho et al, 2018; Streck, Magalhães Júnior, Fagundes, et al, 2018). The programmes have been successful in obtaining genotypes with greater disease resistance, higher grain quality, regulation of flowering time suitable for the most diverse regions, as well as cultivars tolerant to lodging and water deficit, always aiming to meet the consumer market and the requirements and needs of the farmers (Castro, Breseghello, Rangel, & de Moraes, 2005; Santos, Stone, & Vieira, 2006).…”

Section: Introductionmentioning

confidence: 99%

Genetic progress of upland rice (Oryza sativa L.) lines for disease resistance

et al. 2020

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The rice crop is affected by diseases throughout its cycle, impacting negatively on grain yield and quality. The control of the disease impact can be accomplished via crop breeding, using highly multiple resistant genotypes. This study aimed to evaluate the efficiency of multiple‐character and specific selection of multiple resistance to major culture‐associated diseases (neck blast, leaf scald and grain discoloration) in rice lines of the Upland Rice Genetic Breeding Program. The experiments were conducted in 35 sites during 12 agricultural years, where 124 lines were evaluated for the severity of fungal diseases, under natural field conditions. Multiple parameters were calculated based on the diseases´ scores: genetic, phenotypic and environmental variances, heritability, selection gain, renewal rate, and genetic and renewal progress. Genetic variance for the disease resistance was identified in the population, and the selection gain for multiple‐character selection was of 3.16 year−1 throughout the breeding process with a renewal rate of over 35%. The programme has showed efficiency in selecting multiple resistant genotypes to the mentioned diseases, highlighting genotypes with high potential for market release.

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Section: Introductionmentioning

confidence: 99%

Genetic progress of upland rice (Oryza sativa L.) lines for disease resistance

et al. 2020

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“…Já a cultivar BRS Pampeira apresentou elevada produtividade no sistema de inundação (9.494 kg ha -1 ), no entanto, demonstrou ser altamente influenciada pela restrição hídrica, representada pela redução de 6.021 kg ha -1 (63%). Esses resultados corroboram com Streck et al (2018), que verificaram que essa cultivar é altamente responsiva às melhorias do ambiente, sendo indicada para condições de alta tecnologia As médias de produtividade de arroz irrigado com inundação no RS nas Tabela 2. Desempenho genotípico (u+g+ge), índice de variação (∆DAF) e valores da interação genótipo x sistema de irrigação para o caráter de dias até a floração de 10 genótipos de arroz irrigado avaliados nas safras 2011/12 e 2013/14.…”

Section: Resultsunclassified

Desempenho agronômico de cultivares de arroz sob sistema de irrigação por aspersão e inundação

Streck

Aguiar

Facchinello

et al. 2019

Agraria

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RESUMO: Atualmente, são necessárias práticas agronômicas que visem melhorar a eficiência do uso da água nas lavouras de arroz irrigado. O estudo teve por objetivo avaliar cultivares de arroz irrigado em sistema de irrigação por inundação e aspersão com uso de pivô linear. O experimento foi conduzido na Embrapa, no Capão do Leão, Rio Grande do Sul (latitude S 31º48'49" e longitude O 52º28'20"), nas safras 2011/12 e 2013/14. Implementou-se os sistemas de irrigação por inundação com lâmina de água permanente e o sistema de irrigação por aspersão com pivô linear. Foram avaliados os genótipos BRS Atalanta, BRS Querência, BRS Pampa, BR-IRGA 410, BR-IRGA 409, BRS Sinuelo CL, BRS Fronteira, BRS 7 'Taim', BRS Pampeira e AB 10101 CL. Os parâmetros avaliados foram: produtividade de grãos, dias até a floração, estatura de plantas e percentual de grãos inteiros após o beneficiamento. A cultivar BRS Pampa destaca-se na irrigação por aspersão, enquanto que, no sistema de inundação a cultivar BRS Pampeira apresenta maior potencial de produtividade. O sistema de irrigação por aspersão com o uso de pivô linear ocasiona o aumento do ciclo até a floração, redução na estatura de plantas e redução média de 32% na produtividade de grãos em comparação com o sistema inundado em arroz irrigado.Palavras-chave: eficiência de irrigação; Oryza sativa L.; pivô linear; produtividade de grãos Agronomic performance of rice cultivars under sprinkler and flood-irrigation system ABSTRACT: Currently, agronomic practices needed to improve the water efficiency use in irrigated rice crops. The study aimed to evaluate rice cultivars in flood and sprinkler-irrigated system with linear pivot. The experiment was conducted at Embrapa, in Capão do Leão, Rio Grande do Sul (31º48'49"S, 52º28'20"W), in 2011/12 and 2013/14 crop season. It was implemented in the permanent flood-irrigation systems with water blade and sprinkler-irrigation system with linear pivot. Were evaluated the genotypes BRS Atalanta, BRS Querência, BRS Pampa, BR IRGA 410, BR IRGA 409, BRS Sinuelo CL, BRS Fronteira, BRS 7 'Taim', BRS Pampeira and AB 10101 CL. The parameters evaluated were: grain yield, days to flowering, plant height and percentage of entire grains after industrial processing. The cultivar BRS Pampa stands out in sprinkler-irrigation, while in the flood-irrigation system the cultivar BRS Pampeira presents greater yield potential. The sprinkler-irrigation system with the linear pivot results in an increase in cycle to flowering, reduction in plant height and a 32% reduction in a grain yield compared to flood-irrigation in irrigated rice.Desempenho agronômico de cultivares de arroz sob sistema de irrigação por aspersão e inundação Rev. Bras.

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“…With population growth, demand has increased over the years and it is estimated that by 2050 global rice production should increase from 60 to 110% to supply the demand (Godfray et al, 2010;Ray et al, 2013). Flooded rice (O. sativa) is a very important crop in Brazil (Streck et al, 2018), with about 80% of planted area in relation to rainfed crops and an annual production of ~10 Tg for the 2018 -2019 harvest (Conab, 2019).…”

Section: Introductionmentioning

confidence: 99%

Research Article Methods of adaptability and stability applied to the improvement of flooded rice

Júnior¹,

Carneiro²,

Santos³

et al. 2020

Genet. Mol. Res.

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Rice (Oryza sativa) is crop that adapts well to diverse soil and climate conditions; breeding programs have generally been committed to identifying and selecting genotypes that are stable and have high productivity in various environments. In this sense, studies of adaptability and stability are of paramount importance to aid in the recommendation of cultivars, since it allows growers to obtain detailed information about the behavior of the genotypes in each region. We evaluatde the adaptability and stability of irrigated rice genotypes grown with continuous flooding, for the selection and recommendation of cultivars for crops or breeding programs. Eighteen genotypes were evaluated for grain yield in four agricultural years at three sites, covering 12 environments. The adaptability and stability were assessed by the methods of Eberhart and Russell, multiple centroids and GGE biplot. Genotypes behaved differently regarding stability and adaptability in the different environments. Both methodologies identified BRA 02691 and MGI 0607-1 as promising to be released as cultivars; however, classification inconsistencies occurred, such as for the line BRA 031001. Multiple centroid and GGE biplot methods demonstrated greater sensitivity ©FUNPEC-RP www.funpecrp.com.br Genetics and Molecular Research 19 (3): gmr18434 A.C. Silva Junior et al. 2 than the Eberhart and Russell method. Using the methods simultaneously provides an innovative approach to the interpretation of GxE interactions and is a viable alternative for genotype classification. The genotype MGI 0607-1 showed promising behavior independent of the methodology used.

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Adaptability and stability of flood-irrigated rice cultivars released to the subtropical region of Brazil

Cited by 4 publications

References 22 publications

Genetic progress of upland rice (Oryza sativa L.) lines for disease resistance

Genetic progress of upland rice (Oryza sativa L.) lines for disease resistance

Desempenho agronômico de cultivares de arroz sob sistema de irrigação por aspersão e inundação

Research Article Methods of adaptability and stability applied to the improvement of flooded rice

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