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: | 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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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 |
|
_version_ |
1749140524756893696 |