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

Carvalho, Luciana Marques de; Carvalho, H. W. L. de; Oliveira, I. R. de; Rangel, M. A. S.; Santos, V. da S.

doi:10.1590/0103-8478cr20151035

Cited by 13 publications

(8 citation statements)

References 12 publications

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“…This gradually reduces transpiration, in addition to more efficiently using metabolites produced by photosynthesis (DUQUE;TURYAGYENDA et al, 2013). These characteristics give cassava greater resistance to water stress compared to other crops; however, with tolerance mechanisms aimed at plant survival, growth, and especially, productivity can be substantially reduced (ZHAO et al, 2015;CARVALHO et al, 2016).…”

Section: Initial Growth Of Cassava Plants CV Mossoró Under Differentmentioning

confidence: 99%

“…A mandioca, em condições de baixa umidade no solo, fecha parcialmente ou totalmente os estômatos pelo acúmulo de ácido abscísico (ABA), o que reduz gradualmente a transpiração, além de utilizar mais eficientemente os metabólitos produzidos no processo fotossintético (DUQUE;TURYAGYENDA et al, 2013). Essas características conferem a mandioca maior resistência ao estresse hídrico, quando comparada com outras culturas, entretanto, o crescimento e, principalmente, a produtividade podem reduzir substancialmente, tendo em vista que os mecanismos de tolerância buscam a sobrevivência da planta (ZHAO et al, 2015;CARVALHO et al, 2016).…”

Section: Introductionunclassified

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Initial growth of cassava plants cv. Mossoró under different water regimes

Neto

Coelho

Andrade

et al. 2018

AGRO@MBIENTE ON-LINE

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The sprouting phase of cassava is critical for the establishment of the plant, with this phase being dependent on soil moisture. As such, this study evaluated the effect of different irrigation levels on the initial growth of cassava cv. Mossoró in semi-arid conditions. The experiment was conducted under completely randomized design conditions with 5 replications. The treatments in pots containing one plant per experimental unit consisted of 5 irrigation levels, 0, 25, 50, 75 and 100% of the reference evapotranspiration (ETo, mm day-1), which corresponded to totals for the experimental period of 11.20; 42.15; 73.09; 104.03 and 134.97 mm, respectively. At 30 days after planting, the number of leaves and stems, as well as the dry mass of the shoot and the root had increased sharply for irrigation levels up to 73.09 mm. For higher irrigation levels there was a tendency for plant growth stabilization; however, above 104.03 mm there was a decrease. Shoot and root dry mass ratio showed severe water stress at the 11.20 mm level, being more damaging to root growth. Plant height showed a positive linear trend as the level of irrigation was increased, as opposed to water use efficiency. Therefore, irrigation with 50% replacement of ETo (73.09 mm) provided the best conditions for early growth of cassava.

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Section: Initial Growth Of Cassava Plants CV Mossoró Under Differentmentioning

confidence: 99%

Section: Introductionunclassified

Initial growth of cassava plants cv. Mossoró under different water regimes

Neto

Coelho

Andrade

et al. 2018

AGRO@MBIENTE ON-LINE

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“…Cassava ( Manihot esculenta Crantz) is a major crop for the local economy in Northeast Brazil. In the Coastal Tableland of Northeast Brazil, cassava production is severely constrained by drought and pests [1,2,3]. Although cassava varieties are conventionally bred in Brazil [2], cassava breeding remains a tedious and lengthy task [4,5].…”

Section: Introductionmentioning

confidence: 99%

“…The cultivars Verdinha (BRS 222), Amansa burro (BRS 293) and Tapioqueira (BRS 325) were developed and released by EMBRAPA. They are adapted to Coastal Tableland of Northeast Brazil with traits such as drought tolerance [3,23]. The Verdinha cultivar has also been reported to have a good potential for protein production [24].…”

Section: Introductionmentioning

confidence: 99%

Genetic Transformation of Recalcitrant Cassava by Embryo Selection and Increased Hormone Levels

Lentz

Eisner

McCallum

et al. 2018

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Genetic engineering is considered to be an important tool for the improvement of cassava. Cassava is a highly heterozygous crop species for which conventional breeding is a lengthy and tedious process. Robust transformation is based on Agrobacterium-mediated transformation of friable embryogenic callus (FEC). Production of FEC is genotype-dependent and considered to be a major bottleneck for the genetic transformation of cassava. As a consequence, routine genetic transformation has only been established for a handful of cassava cultivars. Therefore, development of procedures enabling efficient production of high-quality cassava FEC is required to allow the translation of research from the model cultivar to farmer-preferred cassava cultivars. Here we study the FEC production capacity of Brazilian cassava cultivars and report the modification of the protocol for the genetic transformation of Verdinha (BRS 222), a recalcitrant cultivar with high potential for protein production that is extensively used by farmers in Brazil.

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“…It can be grown on marginal lands (Fu et al, 2014) and some varieties are drought tolerant (Okogbenin et al, 2013;Carvalho et al, 2016;Brown et al, 2016). However, cassava in farmer's field does not produce at its potential, partly due to the lack of improved varieties and the susceptibility of landrace to pests and diseases among which the cassava mosaic disease (CMD) (Thresh and Cooter 2005).…”

Section: Introductionmentioning

confidence: 99%

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2017

IJAPR

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Cassava Mosaic disease (CMD) is transmitted either through infected cuttings or by whiteflies. We investigated how phytosanitation methods could affect cassava varieties responses to CMD infection and its vectorand the relationship between vector abundance and CMD incidence. The experiment was set in a completely randomized design with three phytosanitation methods applied on four cassava varieties. CMD severity and whitefly population were assessed at 1, 3, 6 and 9 months after planting. Yield data was recorded at harvest, 12 months after planting. Phytosanitation had effect on CMD incidence on all varieties except the local check which had more than 90% of its plants infected. There was no difference in whitefly population abundance between treatments. We found a negative correlation between vector abundance and CMD incidence with variety 92/0326 having lowest CMD incidence and more whitefly counts. At harvest, main difference in the fresh root yield was observed between the removal treatment and the others. Large difference in yield were observed between varieties, with the local variety producing less than the other varieties. The combination of phytosanitation and cassava varieties with initial level of CMD resistance can reduce the transmission of CMD in cassava fields in the humid tropical forest.

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

Cited by 13 publications

References 12 publications

Initial growth of cassava plants cv. Mossoró under different water regimes

Initial growth of cassava plants cv. Mossoró under different water regimes

Genetic Transformation of Recalcitrant Cassava by Embryo Selection and Increased Hormone Levels

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