Data/hora: 15/06/2024 04:46:08

Biblioteca(s): | Embrapa Mandioca e Fruticultura; Embrapa Semiárido.
Data corrente: | 14/08/2017
Data da última atualização: | 08/01/2020
Autoria: | OLIVEIRA, E. J. de; MORGANTE, C. V.; AIDAR, S. de T.; CHAVES, A. R. de M.; ANTONIO, R. P.; CRUZ, J. L.; COELHO FILHO, M. A.
Afiliação: | EDER JORGE DE OLIVEIRA, CNPMF; CAROLINA VIANNA MORGANTE, CPATSA; SAULO DE TARSO AIDAR, CPATSA; AGNALDO RODRIGUES DE MELO CHAVES, CPATSA; RAFAELA PRISCILA ANTONIO, CPATSA; JAILSON LOPES CRUZ, CNPMF; MAURICIO ANTONIO COELHO FILHO, CNPMF.
Título: | Evaluation of cassava germplasm for drought tolerance under field conditions.
Ano de publicação: | 2017
Fonte/Imprenta: | Euphytica, v. 213, n. 8, aug. 2017.
DOI: | 10.1007/s10681-017-1972-
Idioma: | Inglês
Conteúdo: | The development of cassava (Manihot esculenta Crantz) with a high yield under water-deficit conditions is one of the goal of the breeding programs. The objective of this study was to evaluate the performance and to select cassava accessions based on drought tolerance indices and productive potential under water stress. Forty-nine accessions were evaluated for five agronomic traits (plant height?PH, root yield?RoY, shoot yield?ShY, harvest index?HI; and dry matter content of roots?DMC) under full irrigation conditions and drought stress (DS). The accessions were selected based on: (i) high yield under drought conditions (HY-DS) and (ii) high drought tolerance (Dr-To) based on six different indices. Overall, water stress dramatically reduced the traits? means (RoY?72.98%, ShY?54.95%, DMC?26.15%, HI?31.05%, and PH?32.95%). Low coincidence among the top ten accessions was identified based on HY-DS and Dr-To criteria. Therefore, considering only the most important traits (RoY andShY), five accessions (BGM0815, BGM0598, 9624-09, BGM0818, and BRS Formosa) presented high HY-DS. In contrast, to Dr-To criterion, eight and nine accessions were selected for high yield of the aerial part (ShY and PH) and roots (RoY and DMC), respectively. The mean productivity, geometric mean productivity, and drought tolerance indices were the most promising to identify genotypes with high agronomic attributes, while drought susceptibility index, susceptibility, and yield stability index were suitable to identify the most drought tolerant accessions. This set of selected accessions can be used in breeding programs aimed at high yield and drought tolerance.
Palavras-Chave: | Deficit de água; Germplasma; Tolerância a seca; Water deficit.
Thesagro: | Mandioca; Manihot Esculenta.
Thesaurus Nal: | Cassava; Drought tolerance; Plant breeding.
Categoria do assunto: | F Plantas e Produtos de Origem Vegetal
URL: | http://ainfo.cnptia.embrapa.br/digital/bitstream/item/162681/1/Carolina-2017.pdf
Registro original: | Embrapa Semiárido (CPATSA)

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