Seleção recorrente na população CNA9 de arroz de terras altas para tolerância e responsividade ao fósforo
Autor(a) principal: | |
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Data de Publicação: | 2015 |
Tipo de documento: | Dissertação |
Idioma: | por |
Título da fonte: | Repositório Institucional da UFG |
Texto Completo: | http://repositorio.bc.ufg.br/tede/handle/tede/4860 |
Resumo: | The upland rice has a high potential for expansion in the Brazilian savannahs region, where soils have limiting factors to yields, such as low phosphorus (P) availability. Considering the costs and the natural reserves scarcity, a suitable alternative is to explore the genetic resources to develop cultivars with P deficiency tolerance and P-use efficiency. Given the polygenic inheritance of these traits, a strategy is to concentrate the favorable alleles gradually through recurrent selection. The objectives of this study were to estimate genetic and phenotypic parameters, and evaluate progenies from CNA9/3/1 recurrent selection population of upland rice for the tolerance to P deficiency in the soil. In 2011/12 crop year, in Santo Antônio de Goiás-GO and Sinop-MT, two contrasting trials were conducted within each location: low and high P-level determined by the clay content of the soil, and without discrimination of other crop practices. The simple square lattice design 14 x 14 was adopted, with 189 S0:2 progenies and seven checks, with plots consisted of four 3-m-long rows. Grain yield (GY, in kg ha-1), plant height (PH, cm) and days-to-flowering (DF, in days) were evaluated. The individual variance analysis by location and by P-level were obtained, well as their phenotypic, genetic and environmental correlations. Only for PG, genetic and phenotypic parameters were estimated from joint analysis of variance within each P-level, and involving locations and P-levels. Estimates of the expected response to selection were obtained for the two P-levels, considering the direct, indirect and general selection criteria, and also the Harmonic Mean of Relative Performance () and Tolerance Index () of the genotypes identified as efficient and responsive from a graphic dispersion of adjusted means. The overall average of the GY was reduced significantly in 27% for P deficiency in the soil and the genetic variance among S0:2 progenies (̂ 2) was narrowed in 63%. Highly significant diferences (p≤0.01) were observed among progenies, demonstrating the presence of sufficient genetic variability for GY, in this population, to obtain genetic progress in both P-levels. The progenies showed performance significantly (p≤0.01) below the of checks and also a significant interaction (p≤0.01) with locations, in both P-levels. The genotype x Plevel interaction was significant (p≤0.01) and the phenotypic correlation (√R2) between Plevels was low (0.44). In this sense, the expected response to selection demonstrated that progenies must be evaluated in P-deficient environments to obtain effective genetic gain in this environment. The genetic correlations between traits were significant (p≤0.01) and are favorable for the selection of genotypes with tolerance to P deficiency, short plant height and early cycle. However, there is a greater difficulty in increasing the yield potencial, since there the genetic correlation between this trait and PH was significant (p≤0.01) and positive (= 0.385). From the graphic dispersion of S0:2 progeny means have been identified 57 efficient and responsive to the presence of P in the soil, and for the selection within this group, the was more appropriate than , because considering simultaneously these two attributes. |
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Melo, Patrícia Guimarães Santoshttp://lattes.cnpq.br/1508679345970114Colombari Filho, José Manoelhttp://lattes.cnpq.br/6219757785427246Oliveira, Tereza Cristina deMelo, Patrícia Guimarães SantosFritsche Neto, RobertoRangel, Paulo Hideo NakanoColombari Filho, José Manoelhttp://lattes.cnpq.br/0285845278783380Vidotti, Miriam Suzane2015-11-05T10:11:48Z2015-02-12VIDOTTI, M. S. Seleção recorrente na população CNA9 de arroz de terras altas para tolerância e responsividade ao fósforo. 2015. 118 f. Dissertação (Mestrado em Genética e Melhoramento de Plantas) - Universidade Federal de Goiás, Goiânia, 2015.http://repositorio.bc.ufg.br/tede/handle/tede/4860The upland rice has a high potential for expansion in the Brazilian savannahs region, where soils have limiting factors to yields, such as low phosphorus (P) availability. Considering the costs and the natural reserves scarcity, a suitable alternative is to explore the genetic resources to develop cultivars with P deficiency tolerance and P-use efficiency. Given the polygenic inheritance of these traits, a strategy is to concentrate the favorable alleles gradually through recurrent selection. The objectives of this study were to estimate genetic and phenotypic parameters, and evaluate progenies from CNA9/3/1 recurrent selection population of upland rice for the tolerance to P deficiency in the soil. In 2011/12 crop year, in Santo Antônio de Goiás-GO and Sinop-MT, two contrasting trials were conducted within each location: low and high P-level determined by the clay content of the soil, and without discrimination of other crop practices. The simple square lattice design 14 x 14 was adopted, with 189 S0:2 progenies and seven checks, with plots consisted of four 3-m-long rows. Grain yield (GY, in kg ha-1), plant height (PH, cm) and days-to-flowering (DF, in days) were evaluated. The individual variance analysis by location and by P-level were obtained, well as their phenotypic, genetic and environmental correlations. Only for PG, genetic and phenotypic parameters were estimated from joint analysis of variance within each P-level, and involving locations and P-levels. Estimates of the expected response to selection were obtained for the two P-levels, considering the direct, indirect and general selection criteria, and also the Harmonic Mean of Relative Performance () and Tolerance Index () of the genotypes identified as efficient and responsive from a graphic dispersion of adjusted means. The overall average of the GY was reduced significantly in 27% for P deficiency in the soil and the genetic variance among S0:2 progenies (̂ 2) was narrowed in 63%. Highly significant diferences (p≤0.01) were observed among progenies, demonstrating the presence of sufficient genetic variability for GY, in this population, to obtain genetic progress in both P-levels. The progenies showed performance significantly (p≤0.01) below the of checks and also a significant interaction (p≤0.01) with locations, in both P-levels. The genotype x Plevel interaction was significant (p≤0.01) and the phenotypic correlation (√R2) between Plevels was low (0.44). In this sense, the expected response to selection demonstrated that progenies must be evaluated in P-deficient environments to obtain effective genetic gain in this environment. The genetic correlations between traits were significant (p≤0.01) and are favorable for the selection of genotypes with tolerance to P deficiency, short plant height and early cycle. However, there is a greater difficulty in increasing the yield potencial, since there the genetic correlation between this trait and PH was significant (p≤0.01) and positive (= 0.385). From the graphic dispersion of S0:2 progeny means have been identified 57 efficient and responsive to the presence of P in the soil, and for the selection within this group, the was more appropriate than , because considering simultaneously these two attributes.O arroz de terras altas possui um elevado potencial de expansão na região de cerrado brasileiro, onde os solos possuem fatores limitantes a produção, como a baixa disponibilidade de fósforo (P). Considerando os custos de produção e a escassez de recursos naturais, uma alternativa adequada é explorar os recursos genéticos afim de desenvolver cultivares tolerantes à deficiência e mais eficientes no uso do P. Tendo em vista a natureza poligênica desses caracteres, a seleção recorrente é uma alternativa que permite concentrar gradualmente os alelos favoráveis. O objetivo deste estudo foi estimar parâmetros genéticos e fenotípicos e avaliar progênies da população CNA9/3/1 de seleção recorrente de arroz de terras altas, quanto a tolerância à deficiência de P no solo. Em 2011/12, em Santo Antônio de Goiás-GO e em Sinop-MT, foram conduzidos dois experimentos contrastantes por local: baixo e alto nível de P, estabelecidos pelo teor de argila do solo, e sem a discriminação dos demais fatores. Foi adotado o delineamento látice quadrado simples 14 x 14, com 189 progênies S0:2 e sete testemunhas, com parcelas de 4 linhas de 3 m de comprimento. Foram avaliados os caracteres produção de grãos (PG, em kg ha-1), altura de planta (AP, em cm) e dias para o florescimento (DF, em dias). Foram obtidas as análises de variância individual por local e por nível de P para esses caracteres e as respectivas correlações fenotípicas, genéticas e ambientais. Somente para PG, foram realizadas as análises de variância conjunta dentro de cada nível de P e, posteriormente, envolvendo níveis e locais, foram estimados os parâmetros genéticos e fenotípicos. Foram obtidas as estimativas da resposta esperada com a seleção direta, indireta e geral considerando os dois níveis de P no solo, além da Média Harmônica da Performance Relativa () e do Índice de Tolerância (IT) para os genótipos identificados como eficientes e responsivos a partir de uma distribuição gráfica de médias ajustadas. A deficiência de P no solo reduziu expressivamente a média geral em 27% para PG, além de estreitar a estimativa da variância genética entre progênies S0:2 (̂ 2) em 63%. Foram observadas diferenças altamente significativas (p≤0,01) entre as progênies, evidenciando a presença de variabilidade genética suficiente na população para progresso genético em PG sob ambos os níveis de P. Essas apresentaram desempenho significativamente (p≤0,01) inferior ao das testemunhas e, também, interação significativa (p≤0,01) com locais, em ambos os níveis de P. Verificou-se que o efeito da interação de genótipo x nível de P foi significativo (p≤0,01) e a correlação fenotípica (√R2) entre níveis de P foi baixa (0,44). Nesse sentido, a resposta esperada com a seleção demonstrou que as progênies devem ser avaliadas em ambientes com deficiência de P para que o ganho genético nesse ambiente seja efetivo. As correlações genéticas entre os caracteres avaliados foram significativas (p≤0,01) e demonstraram ser favoráveis para a seleção de genótipos tolerantes à deficiência de P, porte baixo e ciclo precoce. Porém, existe maior dificuldade de se incrementar o potencial produtivo, visto que houve uma significativa (p≤0,05) correlação positiva entre esse caráter e AP ( = 0,385). A partir da dispersão gráfica das progênies S0:2 foram identificadas 57 eficientes e responsivas à presença de P, sendo que para a seleção dentro desse grupo, demonstrou ser um critério mais adequado que ao se considerar simultaneamente esses dois atributos.Submitted by Cláudia Bueno (claudiamoura18@gmail.com) on 2015-11-04T15:30:38Z No. of bitstreams: 2 Dissertação - Miriam Suzane Vidotti - 2015.pdf: 1671672 bytes, checksum: 08f31cfb7a6ed7c17a0a63b010b31e83 (MD5) license_rdf: 23148 bytes, checksum: 9da0b6dfac957114c6a7714714b86306 (MD5)Approved for entry into archive by Luciana Ferreira (lucgeral@gmail.com) on 2015-11-05T10:11:48Z (GMT) No. of bitstreams: 2 Dissertação - Miriam Suzane Vidotti - 2015.pdf: 1671672 bytes, checksum: 08f31cfb7a6ed7c17a0a63b010b31e83 (MD5) license_rdf: 23148 bytes, checksum: 9da0b6dfac957114c6a7714714b86306 (MD5)Made available in DSpace on 2015-11-05T10:11:48Z (GMT). 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dc.title.por.fl_str_mv |
Seleção recorrente na população CNA9 de arroz de terras altas para tolerância e responsividade ao fósforo |
dc.title.alternative.eng.fl_str_mv |
Recurrent selection in CNA9 population of upland rice for tolerance and responsivity to phosphorus |
title |
Seleção recorrente na população CNA9 de arroz de terras altas para tolerância e responsividade ao fósforo |
spellingShingle |
Seleção recorrente na população CNA9 de arroz de terras altas para tolerância e responsividade ao fósforo Vidotti, Miriam Suzane Oryza sativa L. Genética quantitativa Estresse abiótico Componentes de variância Melhoramento populacional Oryza sativa L. Quantitative genetics Abiotic stress Variance components Breeding population GENETICA::GENETICA VEGETAL |
title_short |
Seleção recorrente na população CNA9 de arroz de terras altas para tolerância e responsividade ao fósforo |
title_full |
Seleção recorrente na população CNA9 de arroz de terras altas para tolerância e responsividade ao fósforo |
title_fullStr |
Seleção recorrente na população CNA9 de arroz de terras altas para tolerância e responsividade ao fósforo |
title_full_unstemmed |
Seleção recorrente na população CNA9 de arroz de terras altas para tolerância e responsividade ao fósforo |
title_sort |
Seleção recorrente na população CNA9 de arroz de terras altas para tolerância e responsividade ao fósforo |
author |
Vidotti, Miriam Suzane |
author_facet |
Vidotti, Miriam Suzane |
author_role |
author |
dc.contributor.advisor1.fl_str_mv |
Melo, Patrícia Guimarães Santos |
dc.contributor.advisor1Lattes.fl_str_mv |
http://lattes.cnpq.br/1508679345970114 |
dc.contributor.advisor-co1.fl_str_mv |
Colombari Filho, José Manoel |
dc.contributor.advisor-co1Lattes.fl_str_mv |
http://lattes.cnpq.br/6219757785427246 |
dc.contributor.advisor-co2.fl_str_mv |
Oliveira, Tereza Cristina de |
dc.contributor.referee1.fl_str_mv |
Melo, Patrícia Guimarães Santos |
dc.contributor.referee2.fl_str_mv |
Fritsche Neto, Roberto |
dc.contributor.referee3.fl_str_mv |
Rangel, Paulo Hideo Nakano |
dc.contributor.referee4.fl_str_mv |
Colombari Filho, José Manoel |
dc.contributor.authorLattes.fl_str_mv |
http://lattes.cnpq.br/0285845278783380 |
dc.contributor.author.fl_str_mv |
Vidotti, Miriam Suzane |
contributor_str_mv |
Melo, Patrícia Guimarães Santos Colombari Filho, José Manoel Oliveira, Tereza Cristina de Melo, Patrícia Guimarães Santos Fritsche Neto, Roberto Rangel, Paulo Hideo Nakano Colombari Filho, José Manoel |
dc.subject.por.fl_str_mv |
Oryza sativa L. Genética quantitativa Estresse abiótico Componentes de variância Melhoramento populacional |
topic |
Oryza sativa L. Genética quantitativa Estresse abiótico Componentes de variância Melhoramento populacional Oryza sativa L. Quantitative genetics Abiotic stress Variance components Breeding population GENETICA::GENETICA VEGETAL |
dc.subject.eng.fl_str_mv |
Oryza sativa L. Quantitative genetics Abiotic stress Variance components Breeding population |
dc.subject.cnpq.fl_str_mv |
GENETICA::GENETICA VEGETAL |
description |
The upland rice has a high potential for expansion in the Brazilian savannahs region, where soils have limiting factors to yields, such as low phosphorus (P) availability. Considering the costs and the natural reserves scarcity, a suitable alternative is to explore the genetic resources to develop cultivars with P deficiency tolerance and P-use efficiency. Given the polygenic inheritance of these traits, a strategy is to concentrate the favorable alleles gradually through recurrent selection. The objectives of this study were to estimate genetic and phenotypic parameters, and evaluate progenies from CNA9/3/1 recurrent selection population of upland rice for the tolerance to P deficiency in the soil. In 2011/12 crop year, in Santo Antônio de Goiás-GO and Sinop-MT, two contrasting trials were conducted within each location: low and high P-level determined by the clay content of the soil, and without discrimination of other crop practices. The simple square lattice design 14 x 14 was adopted, with 189 S0:2 progenies and seven checks, with plots consisted of four 3-m-long rows. Grain yield (GY, in kg ha-1), plant height (PH, cm) and days-to-flowering (DF, in days) were evaluated. The individual variance analysis by location and by P-level were obtained, well as their phenotypic, genetic and environmental correlations. Only for PG, genetic and phenotypic parameters were estimated from joint analysis of variance within each P-level, and involving locations and P-levels. Estimates of the expected response to selection were obtained for the two P-levels, considering the direct, indirect and general selection criteria, and also the Harmonic Mean of Relative Performance () and Tolerance Index () of the genotypes identified as efficient and responsive from a graphic dispersion of adjusted means. The overall average of the GY was reduced significantly in 27% for P deficiency in the soil and the genetic variance among S0:2 progenies (̂ 2) was narrowed in 63%. Highly significant diferences (p≤0.01) were observed among progenies, demonstrating the presence of sufficient genetic variability for GY, in this population, to obtain genetic progress in both P-levels. The progenies showed performance significantly (p≤0.01) below the of checks and also a significant interaction (p≤0.01) with locations, in both P-levels. The genotype x Plevel interaction was significant (p≤0.01) and the phenotypic correlation (√R2) between Plevels was low (0.44). In this sense, the expected response to selection demonstrated that progenies must be evaluated in P-deficient environments to obtain effective genetic gain in this environment. The genetic correlations between traits were significant (p≤0.01) and are favorable for the selection of genotypes with tolerance to P deficiency, short plant height and early cycle. However, there is a greater difficulty in increasing the yield potencial, since there the genetic correlation between this trait and PH was significant (p≤0.01) and positive (= 0.385). From the graphic dispersion of S0:2 progeny means have been identified 57 efficient and responsive to the presence of P in the soil, and for the selection within this group, the was more appropriate than , because considering simultaneously these two attributes. |
publishDate |
2015 |
dc.date.accessioned.fl_str_mv |
2015-11-05T10:11:48Z |
dc.date.issued.fl_str_mv |
2015-02-12 |
dc.type.status.fl_str_mv |
info:eu-repo/semantics/publishedVersion |
dc.type.driver.fl_str_mv |
info:eu-repo/semantics/masterThesis |
format |
masterThesis |
status_str |
publishedVersion |
dc.identifier.citation.fl_str_mv |
VIDOTTI, M. S. Seleção recorrente na população CNA9 de arroz de terras altas para tolerância e responsividade ao fósforo. 2015. 118 f. Dissertação (Mestrado em Genética e Melhoramento de Plantas) - Universidade Federal de Goiás, Goiânia, 2015. |
dc.identifier.uri.fl_str_mv |
http://repositorio.bc.ufg.br/tede/handle/tede/4860 |
identifier_str_mv |
VIDOTTI, M. S. Seleção recorrente na população CNA9 de arroz de terras altas para tolerância e responsividade ao fósforo. 2015. 118 f. Dissertação (Mestrado em Genética e Melhoramento de Plantas) - Universidade Federal de Goiás, Goiânia, 2015. |
url |
http://repositorio.bc.ufg.br/tede/handle/tede/4860 |
dc.language.iso.fl_str_mv |
por |
language |
por |
dc.relation.program.fl_str_mv |
1167494949003462214 |
dc.relation.confidence.fl_str_mv |
600 600 600 600 |
dc.relation.department.fl_str_mv |
4500684695727928426 |
dc.relation.cnpq.fl_str_mv |
-7397920248419280716 |
dc.relation.sponsorship.fl_str_mv |
-2555911436985713659 |
dc.rights.driver.fl_str_mv |
http://creativecommons.org/licenses/by-nc-nd/4.0/ info:eu-repo/semantics/openAccess |
rights_invalid_str_mv |
http://creativecommons.org/licenses/by-nc-nd/4.0/ |
eu_rights_str_mv |
openAccess |
dc.format.none.fl_str_mv |
application/pdf |
dc.publisher.none.fl_str_mv |
Universidade Federal de Goiás |
dc.publisher.program.fl_str_mv |
Programa de Pós-graduação em Genetica e Melhoramentode Plantas |
dc.publisher.initials.fl_str_mv |
UFG |
dc.publisher.country.fl_str_mv |
Brasil |
dc.publisher.department.fl_str_mv |
Escola de Agronomia e Engenharia de Alimentos - EAEA (RG) |
publisher.none.fl_str_mv |
Universidade Federal de Goiás |
dc.source.none.fl_str_mv |
reponame:Repositório Institucional da UFG instname:Universidade Federal de Goiás (UFG) instacron:UFG |
instname_str |
Universidade Federal de Goiás (UFG) |
instacron_str |
UFG |
institution |
UFG |
reponame_str |
Repositório Institucional da UFG |
collection |
Repositório Institucional da UFG |
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Repositório Institucional da UFG - Universidade Federal de Goiás (UFG) |
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tasesdissertacoes.bc@ufg.br |
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1798044313079250944 |