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 | Acesso ao texto completo restrito à biblioteca da Embrapa Caprinos e Ovinos. Para informações adicionais entre em contato com cnpc.biblioteca@embrapa.br. |
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Registro Completo |
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Biblioteca(s): |
Embrapa Caprinos e Ovinos. |
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Data corrente: |
14/05/2004 |
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Data da última atualização: |
29/08/2023 |
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Tipo da produção científica: |
Artigo em Periódico Indexado |
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Autoria: |
ARAÚJO, M. R. A. de; COULMAN, B. E. |
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Afiliação: |
MARCELO RENATO ALVES DE ARAÚJO, CNPC; BRUCE E. COULMAN, Agriculture and Agri-Food Canada, Saskaton Research Centre. |
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Título: |
Parent-offsprint regression in meadow bromegrass (Bromus riparius Rehm.): evaluation of two methodologies on heritability estimates. |
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Ano de publicação: |
2004 |
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Fonte/Imprenta: |
Canadian Journal of Plant Science, v. 84, n. 1, p. 125-127, Jan. 2004. |
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DOI: |
https://doi.org/10.4141/P02-119 |
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Idioma: |
Inglês |
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Conteúdo: |
To determine the nature and extent of inflation of estimates of heritabilities by parent-offspring regression methods, 40 clones of meadow bromegrass (Bromus riparius Rehm.) and their half-sib progenies were studied in completely randomized block design trials, with six replications in Saskatoon and Melfort, Canada. Clones and progenies were evaluated for dry matter yield, seed yield, plant height, fertility index and harvest index. The results of the analysis showed a consistent inflation of heritability estimates derived from the simple parent-offspring regression, when compared to the regression estimate by variance-covariance analysis. The two methods successfully removed the environmental covariances from the estimates. However, in the simple regression analysis, error covariance was not removed from the numerator; therefore, heritabilities estimated by this methodology Were higher than those estimated by the variance-covariance method. It was concluded that estimates derived from variance-covariance analysis provide less biased estimates of heritability. |
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Palavras-Chave: |
Análise de regressão; Correlação genética; Genética quantitativa; Herdabilidade; Poa protensis. |
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Thesagro: |
Genética Molecular; Gramínea Forrageira; Melhoramento Genético Vegetal; Pastagem. |
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Thesaurus Nal: |
Bromus riparius; Forage grasses; Genetic correlation; Heritability; Meadows; Molecular genetics; Regression analysis. |
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Categoria do assunto: |
-- |
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Marc: |
LEADER 02161naa a2200337 a 4500
001 1530440
005 2023-08-29
008 2004 bl uuuu u00u1 u #d
024 7 $ahttps://doi.org/10.4141/P02-119$2DOI
100 1 $aARAÚJO, M. R. A. de
245 $aParent-offsprint regression in meadow bromegrass (Bromus riparius Rehm.)$bevaluation of two methodologies on heritability estimates.$h[electronic resource]
260 $c2004
520 $aTo determine the nature and extent of inflation of estimates of heritabilities by parent-offspring regression methods, 40 clones of meadow bromegrass (Bromus riparius Rehm.) and their half-sib progenies were studied in completely randomized block design trials, with six replications in Saskatoon and Melfort, Canada. Clones and progenies were evaluated for dry matter yield, seed yield, plant height, fertility index and harvest index. The results of the analysis showed a consistent inflation of heritability estimates derived from the simple parent-offspring regression, when compared to the regression estimate by variance-covariance analysis. The two methods successfully removed the environmental covariances from the estimates. However, in the simple regression analysis, error covariance was not removed from the numerator; therefore, heritabilities estimated by this methodology Were higher than those estimated by the variance-covariance method. It was concluded that estimates derived from variance-covariance analysis provide less biased estimates of heritability.
650 $aBromus riparius
650 $aForage grasses
650 $aGenetic correlation
650 $aHeritability
650 $aMeadows
650 $aMolecular genetics
650 $aRegression analysis
650 $aGenética Molecular
650 $aGramínea Forrageira
650 $aMelhoramento Genético Vegetal
650 $aPastagem
653 $aAnálise de regressão
653 $aCorrelação genética
653 $aGenética quantitativa
653 $aHerdabilidade
653 $aPoa protensis
700 1 $aCOULMAN, B. E.
773 $tCanadian Journal of Plant Science$gv. 84, n. 1, p. 125-127, Jan. 2004.
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