Data/hora: 03/06/2024 11:24:14

Biblioteca(s): | Embrapa Algodão; Embrapa Clima Temperado.
Data corrente: | 21/07/2014
Data da última atualização: | 16/04/2015
Autoria: | BRITO, G. G. de; SUASSUNA, N. D.; SILVA, V. N.; SOFIATTI, V.; DIOLA, V.; MORELLO, C. de L.
Afiliação: | GIOVANI GREIGH DE BRITO, CPACT; NELSON DIAS SUASSUNA, CNPA; Vivianny Nayse Silva; VALDINEI SOFIATTI, CNPA; Valdir Diola; CAMILO DE LELIS MORELLO, CNPA.
Título: | Leaf-level carbon isotope discrimination and its relationship with yield components as a tool for cotton phenotyping in unfavorable conditions.
Ano de publicação: | 2014
Fonte/Imprenta: | Acta Scientiarum, v. 36, n. 3, p. 335-345, jul./set. 2014.
ISSN: | 1807-8621
DOI: | 10.4025/actasciagron.v36i3.17986
Idioma: | Inglês
Conteúdo: | The initial goal of this study was to measure the efficiency of carbon isotope discrimination (?) in distinguishing between cotton plant genotypes subjected to two water regimes. In addition, ? measurements, leaf water potential and gas exchange ratios were monitored. Using Brazilian breeding lines, this study also tested the usability of ? as a proxy for selecting high-performing yield components in cotton plants grown in unfavorable conditions, particularly water deficiency. For these experiments, ? and yield components were measured and their correlations analyzed. Differences among cotton genotypes for ? (p < 0.0001) were verified, and it was found that this variable was significantly correlated with gas exchange. There was a significant positive correlation between ? and seed cotton yield only in the site experiencing severe water deficiency (Santa Helena de Goiás). However, ? had a significant negative correlation with fiber percentage. Our results indicate that ? is a suitable tool for cotton phenotyping, and it may be applied in cotton breeding programs that aim to produce high-performing yield components in unfavorable conditions.
Palavras-Chave: | Estresse abiótico; Fracionamento do carbono; Troca gasosa.
Categoria do assunto: | --
URL: | http://ainfo.cnptia.embrapa.br/digital/bitstream/item/122450/1/17986-103271-1-PB.pdf
Registro original: | Embrapa Clima Temperado (CPACT)

Exemplares:

CNPA - (27724-1) - UPC - AP - DD -  -  -  - DIS
CPACT - (18306-1) - UPC - AP - DD - 00403 -  - 2014.00403 - DIS