Genetic variation and correlation of agronomic traits in meadow bromegrass (Bromus riparius Rehm) clones.
Autor(a) principal: | |
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Data de Publicação: | 2004 |
Outros Autores: | |
Tipo de documento: | Artigo |
Idioma: | eng |
Título da fonte: | Repositório Institucional da EMBRAPA (Repository Open Access to Scientific Information from EMBRAPA - Alice) |
Texto Completo: | http://www.alice.cnptia.embrapa.br/alice/handle/doc/530371 |
Resumo: | Meadow bromegrass (Bromus riparius Rehm.) is a recently introduced pasture grass in western Canada. Its leafy production and rapid regrowth have made it a major grass species for pasturing beef animals in this region. As relatively little breeding work kas been done on this species, there is little information on its breeding behaviour. The main objective of this study was to estimate total genetic variability, broad-sense heritability, phenotypic and genetic correlations. Forty-four meadow bromegrass clones were evaluated for agronomic characters. Genetic variation for dry matter yield, seed yield, fertility index, harvest index, plant height, plant spread, crude protein, neutral de ter gent fiber and acid de ter gent fiber, was significant. Broad-sense heritability estimates exceeded 50% for all characters. Heritability estimates were at least 3.5 times greater than their standard errors. Phenotypic and genetic correlation between all possible characters were measured There was general agreement in both sign and magnitude between genetic and phenotypic correlations. Correlations between the different characters demonstrated that it is possible to simultaneously improve seed and forage yield. Based on the results, it appears that the development of higher yielding cultivars with higher crude protein, and lower acid and neutral detergent fibers concentration should be possible. |
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Genetic variation and correlation of agronomic traits in meadow bromegrass (Bromus riparius Rehm) clones.Melhoramento genéticoHerdabilidadeCorrelação genéticaCorrelação fenotípicaGramínea ForrageiraVariação GenéticaBromus ripariusMeadow bromegrass (Bromus riparius Rehm.) is a recently introduced pasture grass in western Canada. Its leafy production and rapid regrowth have made it a major grass species for pasturing beef animals in this region. As relatively little breeding work kas been done on this species, there is little information on its breeding behaviour. The main objective of this study was to estimate total genetic variability, broad-sense heritability, phenotypic and genetic correlations. Forty-four meadow bromegrass clones were evaluated for agronomic characters. Genetic variation for dry matter yield, seed yield, fertility index, harvest index, plant height, plant spread, crude protein, neutral de ter gent fiber and acid de ter gent fiber, was significant. Broad-sense heritability estimates exceeded 50% for all characters. Heritability estimates were at least 3.5 times greater than their standard errors. Phenotypic and genetic correlation between all possible characters were measured There was general agreement in both sign and magnitude between genetic and phenotypic correlations. Correlations between the different characters demonstrated that it is possible to simultaneously improve seed and forage yield. Based on the results, it appears that the development of higher yielding cultivars with higher crude protein, and lower acid and neutral detergent fibers concentration should be possible.Marcelo Renato Alves de Araújo, CNPC; Bruce Coulman, Agriculture and Agri-Food Canada, Saskaton Research Centre.ARAÚJO, M. R. A. deCOULMAN, B.2011-04-10T11:11:11Z2011-04-10T11:11:11Z2004-03-1620042013-02-14T11:11:11Zinfo:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/articleCiência Rural, Santa Maria, v. 34, n. 2, p. 505-510, mar./abr. 2004.http://www.alice.cnptia.embrapa.br/alice/handle/doc/530371enginfo:eu-repo/semantics/openAccessreponame:Repositório Institucional da EMBRAPA (Repository Open Access to Scientific Information from EMBRAPA - Alice)instname:Empresa Brasileira de Pesquisa Agropecuária (Embrapa)instacron:EMBRAPA2017-08-15T23:27:55Zoai:www.alice.cnptia.embrapa.br:doc/530371Repositório InstitucionalPUBhttps://www.alice.cnptia.embrapa.br/oai/requestopendoar:21542017-08-15T23:27:55falseRepositório InstitucionalPUBhttps://www.alice.cnptia.embrapa.br/oai/requestcg-riaa@embrapa.bropendoar:21542017-08-15T23:27:55Repositório Institucional da EMBRAPA (Repository Open Access to Scientific Information from EMBRAPA - Alice) - Empresa Brasileira de Pesquisa Agropecuária (Embrapa)false |
dc.title.none.fl_str_mv |
Genetic variation and correlation of agronomic traits in meadow bromegrass (Bromus riparius Rehm) clones. |
title |
Genetic variation and correlation of agronomic traits in meadow bromegrass (Bromus riparius Rehm) clones. |
spellingShingle |
Genetic variation and correlation of agronomic traits in meadow bromegrass (Bromus riparius Rehm) clones. ARAÚJO, M. R. A. de Melhoramento genético Herdabilidade Correlação genética Correlação fenotípica Gramínea Forrageira Variação Genética Bromus riparius |
title_short |
Genetic variation and correlation of agronomic traits in meadow bromegrass (Bromus riparius Rehm) clones. |
title_full |
Genetic variation and correlation of agronomic traits in meadow bromegrass (Bromus riparius Rehm) clones. |
title_fullStr |
Genetic variation and correlation of agronomic traits in meadow bromegrass (Bromus riparius Rehm) clones. |
title_full_unstemmed |
Genetic variation and correlation of agronomic traits in meadow bromegrass (Bromus riparius Rehm) clones. |
title_sort |
Genetic variation and correlation of agronomic traits in meadow bromegrass (Bromus riparius Rehm) clones. |
author |
ARAÚJO, M. R. A. de |
author_facet |
ARAÚJO, M. R. A. de COULMAN, B. |
author_role |
author |
author2 |
COULMAN, B. |
author2_role |
author |
dc.contributor.none.fl_str_mv |
Marcelo Renato Alves de Araújo, CNPC; Bruce Coulman, Agriculture and Agri-Food Canada, Saskaton Research Centre. |
dc.contributor.author.fl_str_mv |
ARAÚJO, M. R. A. de COULMAN, B. |
dc.subject.por.fl_str_mv |
Melhoramento genético Herdabilidade Correlação genética Correlação fenotípica Gramínea Forrageira Variação Genética Bromus riparius |
topic |
Melhoramento genético Herdabilidade Correlação genética Correlação fenotípica Gramínea Forrageira Variação Genética Bromus riparius |
description |
Meadow bromegrass (Bromus riparius Rehm.) is a recently introduced pasture grass in western Canada. Its leafy production and rapid regrowth have made it a major grass species for pasturing beef animals in this region. As relatively little breeding work kas been done on this species, there is little information on its breeding behaviour. The main objective of this study was to estimate total genetic variability, broad-sense heritability, phenotypic and genetic correlations. Forty-four meadow bromegrass clones were evaluated for agronomic characters. Genetic variation for dry matter yield, seed yield, fertility index, harvest index, plant height, plant spread, crude protein, neutral de ter gent fiber and acid de ter gent fiber, was significant. Broad-sense heritability estimates exceeded 50% for all characters. Heritability estimates were at least 3.5 times greater than their standard errors. Phenotypic and genetic correlation between all possible characters were measured There was general agreement in both sign and magnitude between genetic and phenotypic correlations. Correlations between the different characters demonstrated that it is possible to simultaneously improve seed and forage yield. Based on the results, it appears that the development of higher yielding cultivars with higher crude protein, and lower acid and neutral detergent fibers concentration should be possible. |
publishDate |
2004 |
dc.date.none.fl_str_mv |
2004-03-16 2004 2011-04-10T11:11:11Z 2011-04-10T11:11:11Z 2013-02-14T11:11:11Z |
dc.type.driver.fl_str_mv |
info:eu-repo/semantics/publishedVersion info:eu-repo/semantics/article |
format |
article |
status_str |
publishedVersion |
dc.identifier.uri.fl_str_mv |
Ciência Rural, Santa Maria, v. 34, n. 2, p. 505-510, mar./abr. 2004. http://www.alice.cnptia.embrapa.br/alice/handle/doc/530371 |
identifier_str_mv |
Ciência Rural, Santa Maria, v. 34, n. 2, p. 505-510, mar./abr. 2004. |
url |
http://www.alice.cnptia.embrapa.br/alice/handle/doc/530371 |
dc.language.iso.fl_str_mv |
eng |
language |
eng |
dc.rights.driver.fl_str_mv |
info:eu-repo/semantics/openAccess |
eu_rights_str_mv |
openAccess |
dc.source.none.fl_str_mv |
reponame:Repositório Institucional da EMBRAPA (Repository Open Access to Scientific Information from EMBRAPA - Alice) instname:Empresa Brasileira de Pesquisa Agropecuária (Embrapa) instacron:EMBRAPA |
instname_str |
Empresa Brasileira de Pesquisa Agropecuária (Embrapa) |
instacron_str |
EMBRAPA |
institution |
EMBRAPA |
reponame_str |
Repositório Institucional da EMBRAPA (Repository Open Access to Scientific Information from EMBRAPA - Alice) |
collection |
Repositório Institucional da EMBRAPA (Repository Open Access to Scientific Information from EMBRAPA - Alice) |
repository.name.fl_str_mv |
Repositório Institucional da EMBRAPA (Repository Open Access to Scientific Information from EMBRAPA - Alice) - Empresa Brasileira de Pesquisa Agropecuária (Embrapa) |
repository.mail.fl_str_mv |
cg-riaa@embrapa.br |
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1794503342043430912 |