Data/hora: 24/06/2024 23:14:06

Biblioteca(s): | Embrapa Mandioca e Fruticultura.
Data corrente: | 10/01/2008
Data da última atualização: | 29/01/2008
Autoria: | ALVES, A. A. C.; DITA, M. A.; SILVA, A. F.; DUQUE, L.; SETTER, T. L.
Afiliação: | Alfredo Augusto Cunha Alves, CNPMF; Miguel Angel Dita, CNPMF; Alineaurea F. Silva; Luis Duque; Tim L. Setter.
Título: | Evaluation of drought tolerance contrasting cassava varieties under semi-arid environment.
Ano de publicação: | 2007
Fonte/Imprenta: | In: ANNUAL RESEARCH MEETING, 2007, Benoni. Poster Abstrcts...Benoni: Generation Challenge Programme - CGIAR, 2007.
Idioma: | Inglês
Conteúdo: | Cassava varieties are being field evaluated under irrigation and rainfed conditions in the semi-arid environment of Petrolina, Brazil, where the annual average rainfall and potencial evapotranspiration are around 560 mm and 1500 mm, respectively. Plants has been submitted to two water treatment: irrigation and water deficit (irrigated only in the first 3 months after planting). Trials were evaluated in different periods using growth and physiological parameters, aiming to identify most contrasting traits that can be useful to select genotypes for drought tolerant attributes. From the preliminar analysisof the trials'data (not completed yet), the results have showed significant effect of water deficit treatment on production's parameters such as tuber roots fresh weight, number of tuber roots, dry matter and harvest index, with different responses among varieties. The most contrasting traits that have showed correlation to the varieties performance are leaf retention, leaf conductance, and early bulking. Additional analyses, such as abscisic acid, sugars and starch accumulation are currently undergoing. These results will be useful, not only for characterizing the varieties as tolerant or susceptible to drought, but also for defining the better traits for genotype selection in the breeding program.
Thesagro: | Stress.
Thesaurus Nal: | cassava; irrigation; water.
Categoria do assunto: | --
Registro original: | Embrapa Mandioca e Fruticultura (CNPMF)
Exemplares: | CNPMF - (23874-1) - UPC - SP - -- - S12544 -  - 12544 - DIS