Productivity and drought tolerance of cassava cultivars in the Coastal Tablelands of Northeastern Brazil

Ciência Rural

Oliveira, Ivênio Rubens de³  Santos, Vanderlei da Silva²  Rangel, Marco Antônio Sedrez²  Carvalho, Luciana Marques de¹  Carvalho, Hélio Wilson Lemos de¹ 

[1] Embrapa Tabuleiros Costeiros, Aracaju, Brazil;Embrapa Mandioca e Fruticultura, Cruz das Almas, Brazil;Embrapa Milho e Sorgo, Sete Lagoas, Brazil

关键词:  Manihot esculenta;    adaptation;    osmotic adjustment;    photosynthesis;    chlorophyll RESUMO: Dez cultivares de mandioca foram cultivadas no campo e avaliadas para identificar a mais adaptada aos Tabuleiros Costeiros do Nordeste do Brasil;   

DOI  :  10.1590/0103-8478cr20151035

学科分类：农业科学（综合）

来源: Universidade Federal de Santa Maria * Centro de Ciencias Rurais

【 摘 要 】

:Ten cassava cultivars were grown in the field and evaluated to identify the most adapted to the Coastal Tablelands of northeast Brazil. The cultivars showed differences in proline and chlorophyll contents, plant height, number of leaves and branches, canopy area and root production, however they did not differ on photosynthetic rates. Cultivars 'Tianguá' and '9783-13' presented lower root yield, whereas 'BRS Tapioqueira' and 'Irará' had the highest root yield. Few leaves coupled with the highest water use efficiency for CO2 assimilation was found in 'BRS Kiriris' in contrast to 'BRS Jarina' and '9783-13'. 'BRS Caipira' had high proline content in both Umbaúba and Frei Paulo areas, traits usually associated to drought tolerance, that contribute to the adaptation. It is also important to consider that cultivar 'BRS Caipira' was the first to present increase in chlorophyll content after extended period of drought, that indicates a faster recovery after dry season. Furthermore, the results indicated that the most adapted cultivars for cultivation in this area are 'Irará', 'BRS Tapioqueira', 'BRS Kiriris' and 'BRS Caipira'.

【 授权许可】

Unknown