Data/hora: 08/06/2024 09:16:05

Biblioteca(s): | Embrapa Mandioca e Fruticultura.
Data corrente: | 16/10/2009
Data da última atualização: | 02/02/2010
Autoria: | SÁNCHEZ, T.; ORTIZ, D.; CHÁVEZ, A. L.; MORANTE, N.; PÉREZ, J. C.; CALLE, F; FUKUDA, W. M. G.; PACHÓN, H.; CEBALLOS, H.
Afiliação: | Teresa Sánchez, HarvestPlus; Darwin Ortiz, Agrosalud; Alba Lucía Chávez, CIAT; Nelson Morante, HarvestPlus; Juan Carlos Pérez, CIAT; Fernando Calle, CIAT; Wânia Maria Gonçalves Fukuda, CNPMF; Helena Pachón, Agrosalud; Hernán Ceballos, CIAT.
Título: | Progress in enhancing carotenoids content in cassava roots through the year 2008.
Ano de publicação: | 2009
Fonte/Imprenta: | In: REUNIÃO ANUAL DE BIOFORTIFICAÇÃO NO BRASIL, 3., 2009, Aracajú. Anais... Aracajú: Embrapa Tabuleiros Costeiros, 2009. 1 CD-ROM. (Embrapa Tabuleiros Costeiros. Documentos, 148).
Idioma: | Inglês

Conteúdo:

The harvest of new segregating progenies made during the year 2008 was affected by excess of water in a plot that turned out to have deficient drainages. At the time of harvest, therefore, there were too many genotypes that had rotten roots. Nonetheless there was a group of eight genotypes that showed excellent levels of total carotenoids content (TCC) with an average above 13 mg.g-1 FW. Unfortunately logistic problems precluded the evaluation of these roots through HPLC on fresh samples but on frozen ones (-20 °C), which turned out to have obvious overestimations by a factor that cannot be assessed. These genotypes have been cloned and are being evaluated again during 2009. Average total carotenoids content (at 10 months of age) was 8.9 mg.g-1 FW and, when measured again at 12 months, levels had increased to an average of 13.5 mg.g-1
FW. This demonstrates again the effect of age in the accumulation of TCC and the need to take the age factor into consideration in further evaluations. Roots from genotype GM 1521-9 (MCOL2547 x MPER297), when harvested at eight months of age (March 2009), provided a TCC value of 14.3 mg.g-1 FW. It is expected that the same genotype arvested at 12 months of age (August 2009) will have significantly higher values.

Thesaurus Nal: | carotenoids; cassava; plant breeding.
Categoria do assunto: | --
Registro original: | Embrapa Mandioca e Fruticultura (CNPMF)