Size of original collection, grouping and sampling methods for the obtention of germplasm core collection
Main Author: | |
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Publication Date: | 2011 |
Other Authors: | , , |
Format: | Article |
Language: | por |
Source: | Pesquisa Agropecuária Brasileira (Online) |
Download full: | https://seer.sct.embrapa.br/index.php/pab/article/view/8281 |
Summary: | The objective of this study was to verify the effect of original germplasm collection size on the effectiveness of different clustering methods and sampling, used to obtain core collections, and to compare these methods in the establishment of core collections. Simulations were made for seven sizes of original collections, and seven sampling strategies were used for the establishment of core collections using morpho‑agronomic traits. Eight strategies for obtaining core collections were used, six of them by grouping techniques (Tocher and sequential Tocher), and two without grouping (random and Tocher with inverted criteria grouping). For grouping strategies, constant, logarithmic and proportional sampling were used. The explained variance, the value of the determination coefficient, the coincidence coefficient, and the coincidence standard deviation coefficient between the core and the original collections were determined. The constant and logarithmic sampling strategies generate core collections which are representative of the original collections. The sequential Tocher grouping is more efficient in representing the original collection by the core collection than the Tocher’s. Among the evaluated strategies the sampling by Tocher’s inversed grouping criterion is the most efficient to generate representative core collections of the original collections. |
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Size of original collection, grouping and sampling methods for the obtention of germplasm core collectionTamanho de coleção original, métodos de agrupamento e amostragem para obtenção de coleção nuclear de germoplasmaaccession grouping; sampling strategies; Tocher's inverse method; genetic resourcesagrupamento de acessos; estratégias de amostragem; método de Tocher inverso; recursos genéticos. The objective of this study was to verify the effect of original germplasm collection size on the effectiveness of different clustering methods and sampling, used to obtain core collections, and to compare these methods in the establishment of core collections. Simulations were made for seven sizes of original collections, and seven sampling strategies were used for the establishment of core collections using morpho‑agronomic traits. Eight strategies for obtaining core collections were used, six of them by grouping techniques (Tocher and sequential Tocher), and two without grouping (random and Tocher with inverted criteria grouping). For grouping strategies, constant, logarithmic and proportional sampling were used. The explained variance, the value of the determination coefficient, the coincidence coefficient, and the coincidence standard deviation coefficient between the core and the original collections were determined. The constant and logarithmic sampling strategies generate core collections which are representative of the original collections. The sequential Tocher grouping is more efficient in representing the original collection by the core collection than the Tocher’s. Among the evaluated strategies the sampling by Tocher’s inversed grouping criterion is the most efficient to generate representative core collections of the original collections. O objetivo deste trabalho foi verificar o efeito do tamanho da coleção original de germoplasma sobre eficácia de diferentes métodos de agrupamento e de amostragem, utilizados na obtenção de coleções nucleares, e comparar esses métodos no estabelecimento de coleções nucleares. Foram simulados sete tamanhos de coleções originais e utilizadas sete estratégias de amostragem para estabelecimento de coleções nucleares, com uso de caracteres morfo-agronômicos. Oito estratégias de obtenção de coleção nuclear foram empregadas, seis com técnicas de agrupamento (Tocher e Tocher sequencial) e duas sem agrupamento (aleatória e Tocher invertido). Nas estratégias de agrupamento, foram empregadas as amostragens constante, logarítmica e proporcional. Determinaram-se a variância explicada, o valor do coeficiente de determinação, o coeficiente de coincidência e o coeficiente de coincidência do desvio-padrão entre a coleção nuclear e a coleção original. As estratégias de amostragem constante e logarítmica geram coleções nucleares representativas da coleção original. O agrupamento de Tocher sequencial é mais eficaz na representação da coleção original pela coleção nuclear do que o agrupamento de Tocher. Entre as estratégias avaliadas, a amostragem pelo método de Tocher com critério de aglomeração inverso foi a mais eficiente na geração de coleções nucleares representativas das coleções originais.Pesquisa Agropecuaria BrasileiraPesquisa Agropecuária BrasileiraVasconcelos, Edmar Soares deCruz, Cosme DamiãoSilva, Derly José Henriques daBhering, Leonardo Lopes2011-03-22info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionapplication/pdfhttps://seer.sct.embrapa.br/index.php/pab/article/view/8281Pesquisa Agropecuaria Brasileira; v.45, n.12, dez. 2010; 1448-1455Pesquisa Agropecuária Brasileira; v.45, n.12, dez. 2010; 1448-14551678-39210100-104xreponame:Pesquisa Agropecuária Brasileira (Online)instname:Empresa Brasileira de Pesquisa Agropecuária (Embrapa)instacron:EMBRAPAporhttps://seer.sct.embrapa.br/index.php/pab/article/view/8281/6166https://seer.sct.embrapa.br/index.php/pab/article/downloadSuppFile/8281/3947info:eu-repo/semantics/openAccess2014-11-14T19:30:13Zoai:ojs.seer.sct.embrapa.br:article/8281Revistahttp://seer.sct.embrapa.br/index.php/pabPRIhttps://old.scielo.br/oai/scielo-oai.phppab@sct.embrapa.br || sct.pab@embrapa.br1678-39210100-204Xopendoar:2014-11-14T19:30:13Pesquisa Agropecuária Brasileira (Online) - Empresa Brasileira de Pesquisa Agropecuária (Embrapa)false |
dc.title.none.fl_str_mv |
Size of original collection, grouping and sampling methods for the obtention of germplasm core collection Tamanho de coleção original, métodos de agrupamento e amostragem para obtenção de coleção nuclear de germoplasma |
title |
Size of original collection, grouping and sampling methods for the obtention of germplasm core collection |
spellingShingle |
Size of original collection, grouping and sampling methods for the obtention of germplasm core collection Vasconcelos, Edmar Soares de accession grouping; sampling strategies; Tocher's inverse method; genetic resources agrupamento de acessos; estratégias de amostragem; método de Tocher inverso; recursos genéticos. |
title_short |
Size of original collection, grouping and sampling methods for the obtention of germplasm core collection |
title_full |
Size of original collection, grouping and sampling methods for the obtention of germplasm core collection |
title_fullStr |
Size of original collection, grouping and sampling methods for the obtention of germplasm core collection |
title_full_unstemmed |
Size of original collection, grouping and sampling methods for the obtention of germplasm core collection |
title_sort |
Size of original collection, grouping and sampling methods for the obtention of germplasm core collection |
author |
Vasconcelos, Edmar Soares de |
author_facet |
Vasconcelos, Edmar Soares de Cruz, Cosme Damião Silva, Derly José Henriques da Bhering, Leonardo Lopes |
author_role |
author |
author2 |
Cruz, Cosme Damião Silva, Derly José Henriques da Bhering, Leonardo Lopes |
author2_role |
author author author |
dc.contributor.none.fl_str_mv |
|
dc.contributor.author.fl_str_mv |
Vasconcelos, Edmar Soares de Cruz, Cosme Damião Silva, Derly José Henriques da Bhering, Leonardo Lopes |
dc.subject.por.fl_str_mv |
accession grouping; sampling strategies; Tocher's inverse method; genetic resources agrupamento de acessos; estratégias de amostragem; método de Tocher inverso; recursos genéticos. |
topic |
accession grouping; sampling strategies; Tocher's inverse method; genetic resources agrupamento de acessos; estratégias de amostragem; método de Tocher inverso; recursos genéticos. |
description |
The objective of this study was to verify the effect of original germplasm collection size on the effectiveness of different clustering methods and sampling, used to obtain core collections, and to compare these methods in the establishment of core collections. Simulations were made for seven sizes of original collections, and seven sampling strategies were used for the establishment of core collections using morpho‑agronomic traits. Eight strategies for obtaining core collections were used, six of them by grouping techniques (Tocher and sequential Tocher), and two without grouping (random and Tocher with inverted criteria grouping). For grouping strategies, constant, logarithmic and proportional sampling were used. The explained variance, the value of the determination coefficient, the coincidence coefficient, and the coincidence standard deviation coefficient between the core and the original collections were determined. The constant and logarithmic sampling strategies generate core collections which are representative of the original collections. The sequential Tocher grouping is more efficient in representing the original collection by the core collection than the Tocher’s. Among the evaluated strategies the sampling by Tocher’s inversed grouping criterion is the most efficient to generate representative core collections of the original collections. |
publishDate |
2011 |
dc.date.none.fl_str_mv |
2011-03-22 |
dc.type.none.fl_str_mv |
|
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://seer.sct.embrapa.br/index.php/pab/article/view/8281 |
url |
https://seer.sct.embrapa.br/index.php/pab/article/view/8281 |
dc.language.iso.fl_str_mv |
por |
language |
por |
dc.relation.none.fl_str_mv |
https://seer.sct.embrapa.br/index.php/pab/article/view/8281/6166 https://seer.sct.embrapa.br/index.php/pab/article/downloadSuppFile/8281/3947 |
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 |
Pesquisa Agropecuaria Brasileira Pesquisa Agropecuária Brasileira |
publisher.none.fl_str_mv |
Pesquisa Agropecuaria Brasileira Pesquisa Agropecuária Brasileira |
dc.source.none.fl_str_mv |
Pesquisa Agropecuaria Brasileira; v.45, n.12, dez. 2010; 1448-1455 Pesquisa Agropecuária Brasileira; v.45, n.12, dez. 2010; 1448-1455 1678-3921 0100-104x reponame:Pesquisa Agropecuária Brasileira (Online) instname:Empresa Brasileira de Pesquisa Agropecuária (Embrapa) instacron:EMBRAPA |
instname_str |
Empresa Brasileira de Pesquisa Agropecuária (Embrapa) |
instacron_str |
EMBRAPA |
institution |
EMBRAPA |
reponame_str |
Pesquisa Agropecuária Brasileira (Online) |
collection |
Pesquisa Agropecuária Brasileira (Online) |
repository.name.fl_str_mv |
Pesquisa Agropecuária Brasileira (Online) - Empresa Brasileira de Pesquisa Agropecuária (Embrapa) |
repository.mail.fl_str_mv |
pab@sct.embrapa.br || sct.pab@embrapa.br |
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1793416665816367104 |