Genetic variation and correlation of agronomic traits in meadow bromegrass (Bromus riparius Rehm) clones
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...
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| Format: | Article |
| Language: | English |
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Universidade Federal de Santa Maria
2004-04-01
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| Series: | Ciência Rural |
| Subjects: | |
| Online Access: | http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-84782004000200026&tlng=en |
| _version_ | 1819261007206285312 |
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| author | Marcelo Renato Alves de Araújo Bruce Coulman |
| author_facet | Marcelo Renato Alves de Araújo Bruce Coulman |
| author_sort | Marcelo Renato Alves de Araújo |
| collection | DOAJ |
| 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. |
| first_indexed | 2024-12-23T19:34:57Z |
| format | Article |
| id | doaj.art-ccd980f84a454413a1eff42f0e330236 |
| institution | Directory Open Access Journal |
| issn | 1678-4596 |
| language | English |
| last_indexed | 2024-12-23T19:34:57Z |
| publishDate | 2004-04-01 |
| publisher | Universidade Federal de Santa Maria |
| record_format | Article |
| series | Ciência Rural |
| spelling | doaj.art-ccd980f84a454413a1eff42f0e3302362022-12-21T17:33:48ZengUniversidade Federal de Santa MariaCiência Rural1678-45962004-04-0134250551010.1590/S0103-84782004000200026Genetic variation and correlation of agronomic traits in meadow bromegrass (Bromus riparius Rehm) clonesMarcelo Renato Alves de Araújo0Bruce Coulman1Embrapa Caprinos e OvinosAgriculture and Agri-Food CanadaMeadow 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.http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-84782004000200026&tlng=enperennial grassesheritabilityphenotypic correlationgenotypic correlation |
| spellingShingle | Marcelo Renato Alves de Araújo Bruce Coulman Genetic variation and correlation of agronomic traits in meadow bromegrass (Bromus riparius Rehm) clones Ciência Rural perennial grasses heritability phenotypic correlation genotypic correlation |
| title | 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_short | 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 |
| topic | perennial grasses heritability phenotypic correlation genotypic correlation |
| url | http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-84782004000200026&tlng=en |
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