Results of 25 Years of Upland Rice Breeding in Brazil

Breseghello, F.; Morais, O. P. de; Pinheiro, Patrícia Valle; Silva, Ana Carolina Simões; Castro, Emilio; Guimarães, E. P.; Castro, Adriano Pereira de; Pereira, J. A.; Lopes, Altevir de Matos; Utumi, M. M.; Oliveira, Jaison Pereira de

doi:10.2135/cropsci2010.06.0325

Cited by 68 publications

(88 citation statements)

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“…The annual genetic progress in grain yield obtained in recent studies with wheat was 0.92% in Brazil (Beche et al, 2014), 0.67% in Canada (Thomas and Graf, 2014) and 1.00% in China (Wu et al, 2014). Similarly, the annual genetic progress in rice was 0.67% in Brazil (Breseghello et al, 2011); however, no genetic progress was observed in the dry-land rice program of the State of Minas Gerais (Borges et al, 2009). Furthermore, for carioca common bean in the State of Minas Gerais, the annual genetic progress was 6.74% (Barili et al, 2016).…”

Section: Resultsmentioning

confidence: 97%

“…For the oat crop, the studies developed by Barbosa Neto et al (2000) in Brazil and by Redaelli et al (2008) in Italy can be emphasized. In addition, the studies with cereals from the same family as wheat (Nedel, 1994;Rodrigues et al, 2007;Cargnin et al, 2008;Oury et al, 2012;Beche et al, 2014;Thomas and Graf, 2014;Wu et al, 2014), rice (Borges et al, 2009;Breseghello et al, 1999Breseghello et al, , 2011DoVale et al, 2012), and popcorn (Ribeiro et al, 2012) can be highlighted.…”

Section: Introductionmentioning

confidence: 99%

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Genetic progress in oat associated with fungicide use in Rio Grande do Sul, Brazil

et al. 2016

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ABSTRACT. The State of Rio Grande do Sul (RS) is the largest producer of oat in Brazil with the aid of consolidated breeding programs, which are constantly releasing new cultivars. The main objectives of this study were to: 1) evaluate the annual genetic progress in grain yield and hectoliter weight of the oat cultivars in RS, with and without fungicide use on aerial parts of plants; and 2) evaluate the efficiency of oat breeding programs in introducing disease-resistant genes in the released cultivars through network yield trials conducted with and without fungicide use on aerial plant parts. The data on grain yield and hectoliter weight were obtained from 89 competition field trials of oat cultivars carried out from 2007 to 2014 in nine municipalities of RS. Of the total 89 trials, 44 were carried out with fungicide application on aerial plant parts and 45 were carried out without fungicide application. The annual genetic progress in oat cultivars was studied using the methodology proposed by Vencovsky (1988). The annual genetic progress in oat grain yield was 1.02% with fungicide use and 4.02% without fungicide use during the eight-year study period in RS. The annual genetic progress with respect to the hectoliter weight was 0.08% for trials with fungicide use and 0.71% for trials without fungicide use. Performing network yield trials with and without fungicide use on the aerial plants parts is a feasible method to evaluate the efficiency of oat breeding programs in introducing disease-resistant genes in the released cultivars.

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Section: Resultsmentioning

confidence: 97%

Section: Introductionmentioning

confidence: 99%

Genetic progress in oat associated with fungicide use in Rio Grande do Sul, Brazil

et al. 2016

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“…Genetic progress studies have been performed with wheat (Nedel, 1994;Rodrigues et al, 2007;Cargnin et al, 2008;Oury et al, 2012;Beche et al, 2014;Thomas and Graf, 2014;Wu et al, 2014;Gummadov et al, 2015) and cereals from the same wheat family, including oat (Barbosa Neto et al, 2000;Redaelli et al, 2008) and rice (Borges et al, 2009;Breseghello et al, 1999Breseghello et al, , 2011DoVale et al, 2012). It is assumed that there was genetic progress for wheat grain yield in RS influenced by homogeneous regions of cultivation.…”

Section: Introductionmentioning

confidence: 99%

Genetic progress in homogeneous regions of wheat cultivation in Rio Grande do Sul State, Brazil

et al. 2017

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ABSTRACT. The State of Rio Grande do Sul (RS) stands out as the largest wheat producer in Brazil. Wheat is the most emphasized winter cereal in RS, attracting public and private investments directed to wheat genetic breeding. The study of genetic progress should be performed routinely at breeding programs to study the behavior of cultivars developed for homogeneous regions of cultivation. The objectives of this study were: 1) to evaluate the genetic progress of wheat grain yield in RS; 2) to evaluate the influence of cultivar competition trial stratification in homogeneous regions of cultivation on the study of genetic progress. Grain yield data of 122 wheat cultivars evaluated in 137 trials arranged in randomized block design with three or four replications were used. Field trials were carried out in 23 locations in RS divided into two homogeneous regions during the period from 2002 to 2013. Genetic progress for RS and homogeneous regions was studied utilizing the method proposed by Vencovsky. Annual genetic progress for wheat grain yield during the period of 12 years in the State of RS was 2.86%, oscillating between homogeneous regions of cultivation. The difference of annual genetic progress in region 1 (1.82%) in relation to region 2 (4.38%) justifies the study of genetic progress by homogeneous regions of cultivation.

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“…The breeding program for recurrent selection of upland rice of Embrapa aims to genetically improve the populations for a geographic region that is characterized by diverse soils and climatic conditions (Breseghello et al, 2011;Colombari Filho et al, 2013). Therefore, in the next selection cycles, even if genetic variability is maintained for GY and PH in the CNA6 population due to the strong effect of the G×L interaction, it is still necessary to increase the number of replications and locations in order to obtain selection gains superior to those of previous cycles (Morais Júnior et al, 2015), even when satisfactory selection gains are reached.…”

Section: Resultsmentioning

confidence: 99%

“…In Brazil, considered the main producer of this cereal among the countries in the Western Hemisphere, the focus of the genetic breeding programs is to increase yield potential by developing superior genotypes, such as cultivars (Breseghello et al, 2011;Colombari Filho et al, 2013). However, to reach the desired genetic gains, it is necessary to choose correctly both the strategies to manipulate the available genetic variability and the methods to be used (Châtel et al, 2008).…”

Section: Introductionmentioning

confidence: 99%

Genetic variability during four cycles of recurrent selection in rice

Júnior

Melo

Morais

et al. 2017

Pesq. agropec. bras.

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-The objective of this work was to estimate genetic and phenotypic parameters among progenies of the CNA6 population of upland rice (Oryza sativa) for grain yield and plant height in four cycles of recurrent selection, in order to evaluate the genetic variability and the genotype × location interaction. The experimental data were obtained from yield trials of S 0:2 progenies, which were carried out in the experimental design of Federer's augmented blocks, without replications for progenies within each location. The effect of S 0:2 progenies was significant in all cycles for grain yield and in the first three cycles for plant height, indicating the maintenance of the population's genetic potential to generate transgressive progenies. The participation of the component of the progeny × location interaction in phenotypic variance was of high magnitude. The genetic variability of the CNA6 population of upland rice is maintained for grain yield and plant height during the four cycles of recurrent selection.Index terms: Oryza sativa, genotype × environment interaction, population improvement, quantitative genetics, variance components. Variabilidade genética durante quatro ciclos de seleção recorrente em arrozResumo -O objetivo deste trabalho foi estimar parâmetros genéticos e fenotípicos entre progênies da população CNA6 de arroz (Oryza sativa) de terras altas para os caracteres produtividade de grãos e altura de plantas, em quatro ciclos de seleção recorrente, para análise da variabilidade genética e da interação genótipo × local. Os dados experimentais foram obtidos de ensaios de rendimentos de progênies S 0:2 , conduzidos em delineamento experimental de blocos aumentados de Federer, sem repetição para progênies por local. O efeito de progênies S 0:2 foi significativo em todos os ciclos para produtividade de grãos e nos três primeiros ciclos para altura de plantas, o que é indicativo da manutenção do potencial genético da população em gerar progênies transgressivas. A participação do componente da interação progênie × local na variância fenotípica foi de alta magnitude. A variabilidade genética da população CNA6 de arroz de terras altas quanto à produtividade de grãos e à altura de plantas é mantida durante os quatro ciclos de seleção recorrente.Termos para indexação: Oryza sativa, interação genótipo × ambiente, melhoramento populacional, genética quantitativa componentes de variância.

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Results of 25 Years of Upland Rice Breeding in Brazil

Cited by 68 publications

References 17 publications

Genetic progress in oat associated with fungicide use in Rio Grande do Sul, Brazil

Genetic progress in oat associated with fungicide use in Rio Grande do Sul, Brazil

Genetic progress in homogeneous regions of wheat cultivation in Rio Grande do Sul State, Brazil

Genetic variability during four cycles of recurrent selection in rice

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