Data/hora: 10/06/2024 17:21:44

Provedor de dados: | 86
País: | Brazil
Título: | Carbon isotope fractionation for cotton genotype selection
Autores: | Brito,Giovani Greigh de; Suassuna,Nelson Dias; Diola,Valdir; Sofiatti,Valdinei; Ducatti,Carlos; Silva,Evandro Tadeu da; Morello,Camilo de Lelis.
Data: | 2014-09-01
Ano: | 2014
Palavras-chave: | Gossypium; Carbon isotope discrimination; Genetic breeding; Phenotyping.
Resumo: | The objective of this work was to evaluate the carbon isotope fractionation as a phenomic facility for cotton selection in contrasting environments and to assess its relationship with yield components. The experiments were carried out in a randomized block design, with four replicates, in the municipalities of Santa Helena de Goiás (SHGO) and Montividiu (MONT), in the state of Goiás, Brazil. The analysis of carbon isotope discrimination (Δ) was performed in 15 breeding lines and three cultivars. Subsequently, the root growth kinetic and root system architecture from the selected genotypes were determined. In both locations, Δ analyses were suitable to discriminate cotton genotypes. There was a positive correlation between Δ and seed-cotton yield in SHGO, where water deficit was more severe. In this site, the negative correlations found between Δ and fiber percentage indicate an integrative effect of gas exchange on Δ and its association with yield components. As for root robustness and growth kinetic, the GO 05 809 genotype performance contributes to sustain the highest values of Δ found in MONT, where edaphoclimatic conditions were more suitable for cotton. The use of Δ analysis as a phenomic facility can help to select cotton genotypes, in order to obtain plants with higher efficiency for gas exchange and water use.
Tipo: | Info:eu-repo/semantics/article
Idioma: | Inglês
Identificador: | http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-204X2014000900673

Editor:

Embrapa Secretaria de Pesquisa e Desenvolvimento

Pesquisa Agropecuária Brasileira

Relação: | 10.1590/S0100-204X2014000900003
Formato: | text/html
Fonte: | Pesquisa Agropecuária Brasileira  v.49 n.9 2014
Fonte: | info:eu-repo/semantics/openAccess