Genotypic assessment of cassava accessions in Amazonas and estimates of genetic parameters
Autor(a) principal: | |
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Data de Publicação: | 2011 |
Outros Autores: | |
Tipo de documento: | Artigo |
Idioma: | por |
Título da fonte: | Revista de Ciências Agrárias (Belém. Online) |
Texto Completo: | https://ajaes.ufra.edu.br/index.php/ajaes/article/view/102 |
Resumo: | The present study reports the evaluation of genotypic demandioca 250 hits in the State of Amazonas, to the characters commercial yield, starch content in the roots, amount of rotten roots, number of roots per plant, root length and diameter, and features also estimates of genetic parameters (heritability and genetic correlations) that allow us to infer the genetic control and level of genetic variability present in the material evaluated. Methodology was employed REML / BLUP. It was found that the germplasm collection presents considerable genetic variability, except for starch content. Thus, there are good prospects for genetic improvement. The low heritability of verified individual plots (2% to 18%) are consistent with the quantitative and polygenic nature of these characters. The improvement of these characters is fully possible and can be performed efficiently by adopting an appropriate number (5 to 20) repetitions of the experiments. Genetic correlations between production of commercial roots and its component traits (amount of rotten roots, number of roots per plant, length and diameter of roots) amounted to - .12; 0.33; 0.23 and 0.35, respectively, all significant by t test. Thus, the commercial production of roots is positively correlated with the diameter and length of roots and the number of roots per plant. On the other hand, is negatively correlated to the amount of roots rotted. This paper describes the genotypic evaluation of 250 cassava accessions in the state of Amazonas to the characters commercial yield, starch content in the roots, amount of rotten roots, number of roots per plant, length and diameter of roots and also presents estimates genetic parameters (heritabilities and genetic correlations) that allow us to infer the genetic control and level of genetic variability present in the material evaluated. Methodology was employed REML / BLUP. It was found that the germplasm collection presents considerable genetic variability, except for starch content. Thus, there are good prospects for genetic improvement. The low heritability of verified individual plots (2% to 18%) are consistent with the quantitative and polygenic nature of these characters. The improvement of these characters is fully possible and can be performed efficiently by adopting an appropriate number (5 to 20) repetitions of the experiments. Genetic correlations between production of commercial roots and its component traits (amount of rotten roots, number of roots per plant, length and diameter of roots) amounted to -0.12; 0.33; 0.23 and 0.35, respectively. Thus, the commercial production of roots is positively correlated with the diameter and length of roots and the number of roots per plant. On the other hand, is negatively correlated to the amount of roots rotted. |
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Genotypic assessment of cassava accessions in Amazonas and estimates of genetic parametersAvaliação genotípica de acessos de mandioca no Amazonas e estimativas de parâmetros genéticosThe present study reports the evaluation of genotypic demandioca 250 hits in the State of Amazonas, to the characters commercial yield, starch content in the roots, amount of rotten roots, number of roots per plant, root length and diameter, and features also estimates of genetic parameters (heritability and genetic correlations) that allow us to infer the genetic control and level of genetic variability present in the material evaluated. Methodology was employed REML / BLUP. It was found that the germplasm collection presents considerable genetic variability, except for starch content. Thus, there are good prospects for genetic improvement. The low heritability of verified individual plots (2% to 18%) are consistent with the quantitative and polygenic nature of these characters. The improvement of these characters is fully possible and can be performed efficiently by adopting an appropriate number (5 to 20) repetitions of the experiments. Genetic correlations between production of commercial roots and its component traits (amount of rotten roots, number of roots per plant, length and diameter of roots) amounted to - .12; 0.33; 0.23 and 0.35, respectively, all significant by t test. Thus, the commercial production of roots is positively correlated with the diameter and length of roots and the number of roots per plant. On the other hand, is negatively correlated to the amount of roots rotted. This paper describes the genotypic evaluation of 250 cassava accessions in the state of Amazonas to the characters commercial yield, starch content in the roots, amount of rotten roots, number of roots per plant, length and diameter of roots and also presents estimates genetic parameters (heritabilities and genetic correlations) that allow us to infer the genetic control and level of genetic variability present in the material evaluated. Methodology was employed REML / BLUP. It was found that the germplasm collection presents considerable genetic variability, except for starch content. Thus, there are good prospects for genetic improvement. The low heritability of verified individual plots (2% to 18%) are consistent with the quantitative and polygenic nature of these characters. The improvement of these characters is fully possible and can be performed efficiently by adopting an appropriate number (5 to 20) repetitions of the experiments. Genetic correlations between production of commercial roots and its component traits (amount of rotten roots, number of roots per plant, length and diameter of roots) amounted to -0.12; 0.33; 0.23 and 0.35, respectively. Thus, the commercial production of roots is positively correlated with the diameter and length of roots and the number of roots per plant. On the other hand, is negatively correlated to the amount of roots rotted.O presente trabalho relata a avaliação genotípica de 250 acessos demandioca, no Estado do Amazonas, para os caracteres produtividade de raízes comerciais, teor de amido nas raízes, quantidade de raízes podres, número de raízes por planta, comprimento e diâmetro das raízes, e apresenta também estimativas de parâmetros genéticos (herdabilidades e correlações genéticas) que permitem inferir sobre o controle genético e nível de variabilidade genética presente no material avaliado. Foi empregada a metodologia REML/BLUP. Constatou- se que a coleção de germoplasma apresenta considerável variabilidade genética, exceto para teor de amido. Assim, existem boas perspectivas para o melhoramento genético. As baixas herdabilidades de parcelas individuais verificadas (2% a 18%) são coerentes com a natureza quantitativa e poligênica desses caracteres. O melhoramento desses caracteres é plenamente possível e pode ser realizado de forma eficiente adotando-se um número adequado (entre 5 e 20) de repetições nos experimentos. As correlações genéticas entre produção de raízes comerciais e seus caracteres componentes (quantidade de raízes podres, número de raízes por planta, comprimento e diâmetro das raízes) equivaleram a - 0,12; 0,33; 0,23 e 0,35, respectivamente, todas significativas pelo teste t. Assim, a produção de raízes comerciais é positivamente correlacionada com o comprimento e diâmetro de raízes e com o número de raízes por planta. Por outro lado, é negativamente correlacionada com a quantidade de raízes podres. O presente trabalho relata a avaliação genotípica de 250 acessos de mandioca no estado do Amazonas para os caracteres produtividade de raízes comerciais, teor de amido nas raízes, quantidade de raízes podres, número de raízes por planta, comprimento e diâmetro das raízes e apresenta também estimativas de parâmetros genéticos (herdabilidades e correlações genéticas) que permitem inferir sobre o controle genético e nível de variabilidade genética presente no material avaliado. Foi empregada a metodologia REML/BLUP. Constatou-se que a coleção de germoplasma apresenta considerável variabilidade genética, exceto para teor de amido. Assim, existem boas perspectivas para o melhoramento genético. As baixas herdabilidades de parcelas individuais verificadas (2% a 18%) são coerentes com a natureza quantitativa e poligênica desses caracteres. O melhoramento desses caracteres é plenamente possível e pode ser realizado de forma eficiente adotando-se um número adequado (entre 5 e 20) de repetições nos experimentos. As correlações genéticas entre produção de raízes comerciais e seus caracteres componentes (quantidade de raízes podres, número de raízes por planta, comprimento e diâmetro das raízes) equivaleram a -0,12; 0,33; 0,23 e 0,35, respectivamente. Assim, a produção de raízes comerciais é positivamente correlacionada com o comprimento e diâmetro de raízes e com o número de raízes por plantas. Por outro lado, é negativamente correlacionada com a quantidade de raízes podres. Universidade Federal Rural da Amazônia/UFRA2011-05-19info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionapplication/pdfhttps://ajaes.ufra.edu.br/index.php/ajaes/article/view/102Amazonian Journal of Agricultural Sciences Journal of Agricultural and Environmental Sciences; Vol 53 No 2 (2010): RCA; 131-136Revista de Ciências Agrárias Amazonian Journal of Agricultural and Environmental Sciences; v. 53 n. 2 (2010): RCA; 131-1362177-87601517-591Xreponame:Revista de Ciências Agrárias (Belém. Online)instname:Universidade Federal Rural da Amazônia (UFRA)instacron:UFRAporhttps://ajaes.ufra.edu.br/index.php/ajaes/article/view/102/116Barreto, João FerdinandoResendes, Marcos Deon Vilela deinfo:eu-repo/semantics/openAccess2018-12-18T19:12:22Zoai:ojs.www.periodicos.ufra.edu.br:article/102Revistahttps://ajaes.ufra.edu.br/index.php/ajaes/PUBhttps://ajaes.ufra.edu.br/index.php/ajaes/oaiallan.lobato@ufra.edu.br || ajaes.suporte@gmail.com2177-87601517-591Xopendoar:2018-12-18T19:12:22Revista de Ciências Agrárias (Belém. Online) - Universidade Federal Rural da Amazônia (UFRA)false |
dc.title.none.fl_str_mv |
Genotypic assessment of cassava accessions in Amazonas and estimates of genetic parameters Avaliação genotípica de acessos de mandioca no Amazonas e estimativas de parâmetros genéticos |
title |
Genotypic assessment of cassava accessions in Amazonas and estimates of genetic parameters |
spellingShingle |
Genotypic assessment of cassava accessions in Amazonas and estimates of genetic parameters Barreto, João Ferdinando |
title_short |
Genotypic assessment of cassava accessions in Amazonas and estimates of genetic parameters |
title_full |
Genotypic assessment of cassava accessions in Amazonas and estimates of genetic parameters |
title_fullStr |
Genotypic assessment of cassava accessions in Amazonas and estimates of genetic parameters |
title_full_unstemmed |
Genotypic assessment of cassava accessions in Amazonas and estimates of genetic parameters |
title_sort |
Genotypic assessment of cassava accessions in Amazonas and estimates of genetic parameters |
author |
Barreto, João Ferdinando |
author_facet |
Barreto, João Ferdinando Resendes, Marcos Deon Vilela de |
author_role |
author |
author2 |
Resendes, Marcos Deon Vilela de |
author2_role |
author |
dc.contributor.author.fl_str_mv |
Barreto, João Ferdinando Resendes, Marcos Deon Vilela de |
description |
The present study reports the evaluation of genotypic demandioca 250 hits in the State of Amazonas, to the characters commercial yield, starch content in the roots, amount of rotten roots, number of roots per plant, root length and diameter, and features also estimates of genetic parameters (heritability and genetic correlations) that allow us to infer the genetic control and level of genetic variability present in the material evaluated. Methodology was employed REML / BLUP. It was found that the germplasm collection presents considerable genetic variability, except for starch content. Thus, there are good prospects for genetic improvement. The low heritability of verified individual plots (2% to 18%) are consistent with the quantitative and polygenic nature of these characters. The improvement of these characters is fully possible and can be performed efficiently by adopting an appropriate number (5 to 20) repetitions of the experiments. Genetic correlations between production of commercial roots and its component traits (amount of rotten roots, number of roots per plant, length and diameter of roots) amounted to - .12; 0.33; 0.23 and 0.35, respectively, all significant by t test. Thus, the commercial production of roots is positively correlated with the diameter and length of roots and the number of roots per plant. On the other hand, is negatively correlated to the amount of roots rotted. This paper describes the genotypic evaluation of 250 cassava accessions in the state of Amazonas to the characters commercial yield, starch content in the roots, amount of rotten roots, number of roots per plant, length and diameter of roots and also presents estimates genetic parameters (heritabilities and genetic correlations) that allow us to infer the genetic control and level of genetic variability present in the material evaluated. Methodology was employed REML / BLUP. It was found that the germplasm collection presents considerable genetic variability, except for starch content. Thus, there are good prospects for genetic improvement. The low heritability of verified individual plots (2% to 18%) are consistent with the quantitative and polygenic nature of these characters. The improvement of these characters is fully possible and can be performed efficiently by adopting an appropriate number (5 to 20) repetitions of the experiments. Genetic correlations between production of commercial roots and its component traits (amount of rotten roots, number of roots per plant, length and diameter of roots) amounted to -0.12; 0.33; 0.23 and 0.35, respectively. Thus, the commercial production of roots is positively correlated with the diameter and length of roots and the number of roots per plant. On the other hand, is negatively correlated to the amount of roots rotted. |
publishDate |
2011 |
dc.date.none.fl_str_mv |
2011-05-19 |
dc.type.driver.fl_str_mv |
info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion |
format |
article |
status_str |
publishedVersion |
dc.identifier.uri.fl_str_mv |
https://ajaes.ufra.edu.br/index.php/ajaes/article/view/102 |
url |
https://ajaes.ufra.edu.br/index.php/ajaes/article/view/102 |
dc.language.iso.fl_str_mv |
por |
language |
por |
dc.relation.none.fl_str_mv |
https://ajaes.ufra.edu.br/index.php/ajaes/article/view/102/116 |
dc.rights.driver.fl_str_mv |
info:eu-repo/semantics/openAccess |
eu_rights_str_mv |
openAccess |
dc.format.none.fl_str_mv |
application/pdf |
dc.publisher.none.fl_str_mv |
Universidade Federal Rural da Amazônia/UFRA |
publisher.none.fl_str_mv |
Universidade Federal Rural da Amazônia/UFRA |
dc.source.none.fl_str_mv |
Amazonian Journal of Agricultural Sciences Journal of Agricultural and Environmental Sciences; Vol 53 No 2 (2010): RCA; 131-136 Revista de Ciências Agrárias Amazonian Journal of Agricultural and Environmental Sciences; v. 53 n. 2 (2010): RCA; 131-136 2177-8760 1517-591X reponame:Revista de Ciências Agrárias (Belém. Online) instname:Universidade Federal Rural da Amazônia (UFRA) instacron:UFRA |
instname_str |
Universidade Federal Rural da Amazônia (UFRA) |
instacron_str |
UFRA |
institution |
UFRA |
reponame_str |
Revista de Ciências Agrárias (Belém. Online) |
collection |
Revista de Ciências Agrárias (Belém. Online) |
repository.name.fl_str_mv |
Revista de Ciências Agrárias (Belém. Online) - Universidade Federal Rural da Amazônia (UFRA) |
repository.mail.fl_str_mv |
allan.lobato@ufra.edu.br || ajaes.suporte@gmail.com |
_version_ |
1797231626009182208 |