Genetic variation and correlation of agronomic traits in meadow bromegrass (Bromus riparius Rehm) clones

Detalhes bibliográficos
Autor(a) principal: Araújo,Marcelo Renato Alves de
Data de Publicação: 2004
Outros Autores: Coulman,Bruce
Tipo de documento: Artigo
Idioma: eng
Título da fonte: Ciência Rural
Texto Completo: http://old.scielo.br/scielo.php?script=sci_arttext&pid=S0103-84782004000200026
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 has 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 detergent fiber and acid detergent 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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spelling Genetic variation and correlation of agronomic traits in meadow bromegrass (Bromus riparius Rehm) clonesperennial grassesheritabilityphenotypic correlationgenotypic correlationMeadow 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 has 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 detergent fiber and acid detergent 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.Universidade Federal de Santa Maria2004-04-01info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersiontext/htmlhttp://old.scielo.br/scielo.php?script=sci_arttext&pid=S0103-84782004000200026Ciência Rural v.34 n.2 2004reponame:Ciência Ruralinstname:Universidade Federal de Santa Maria (UFSM)instacron:UFSM10.1590/S0103-84782004000200026info:eu-repo/semantics/openAccessAraújo,Marcelo Renato Alves deCoulman,Bruceeng2004-05-25T00:00:00ZRevista
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,Marcelo Renato Alves de
perennial grasses
heritability
phenotypic correlation
genotypic correlation
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,Marcelo Renato Alves de
author_facet Araújo,Marcelo Renato Alves de
Coulman,Bruce
author_role author
author2 Coulman,Bruce
author2_role author
dc.contributor.author.fl_str_mv Araújo,Marcelo Renato Alves de
Coulman,Bruce
dc.subject.por.fl_str_mv perennial grasses
heritability
phenotypic correlation
genotypic correlation
topic perennial grasses
heritability
phenotypic correlation
genotypic correlation
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 has 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 detergent fiber and acid detergent 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 2004-04-01
dc.type.driver.fl_str_mv info:eu-repo/semantics/article
dc.type.status.fl_str_mv info:eu-repo/semantics/publishedVersion
format article
status_str publishedVersion
dc.identifier.uri.fl_str_mv http://old.scielo.br/scielo.php?script=sci_arttext&pid=S0103-84782004000200026
url http://old.scielo.br/scielo.php?script=sci_arttext&pid=S0103-84782004000200026
dc.language.iso.fl_str_mv eng
language eng
dc.relation.none.fl_str_mv 10.1590/S0103-84782004000200026
dc.rights.driver.fl_str_mv info:eu-repo/semantics/openAccess
eu_rights_str_mv openAccess
dc.format.none.fl_str_mv text/html
dc.publisher.none.fl_str_mv Universidade Federal de Santa Maria
publisher.none.fl_str_mv Universidade Federal de Santa Maria
dc.source.none.fl_str_mv Ciência Rural v.34 n.2 2004
reponame:Ciência Rural
instname:Universidade Federal de Santa Maria (UFSM)
instacron:UFSM
instname_str Universidade Federal de Santa Maria (UFSM)
instacron_str UFSM
institution UFSM
reponame_str Ciência Rural
collection Ciência Rural
repository.name.fl_str_mv
repository.mail.fl_str_mv
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