Melhoramento genético e produtividade do cacaueiro no Brasil

Ahnert, Dário; Melo, Hellen Lazaro; Santos, Francisca Feitosa Jucá; Lima, Luciano Ramos de; Baligar, V. C.

doi:10.7476/9786586213188.0005

Cited by 6 publications

(10 citation statements)

References 9 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The search for solutions to combat witches’ broom disease, making it possible to overcome the impacts on cocoa production and productivity, has led to various studies being carried out (Ahnert et al, 2018; Armengot et al, 2020; ten Hoopen & Krauss, 2016; Niether et al, 2018; Tothmihaly et al, 2019). In recent years, results have indicated different field control strategies for witches’ broom, with possible increases in production (Table 1).…”

Section: Control Strategiesmentioning

confidence: 99%

“…Between 1933 and 1935, cocoa trees with interesting agronomic characteristics were selected in Trinidad, for example, large fruits and seeds, high production, and resistance to diseases and pests. This collection is known worldwide as the Imperial College Selection (ICS) and these cocoa genetic resources were shared with several countries and used in breeding programmes (Ahnert et al, 2018). One of the problems of genetic improvement is the incompatibility in cocoa or cocoa clones, as incompatible plants in the field generate reduced production (Akoa et al, 2021; López et al, 2021).…”

Section: Control Strategiesmentioning

confidence: 99%

“…One of the problems of genetic improvement is the incompatibility in cocoa or cocoa clones, as incompatible plants in the field generate reduced production (Akoa et al, 2021; López et al, 2021). Other difficulties are related to the identification of resistance in the field and the time to develop genetically improved cultivars (Ahnert et al, 2018).…”

Section: Control Strategiesmentioning

confidence: 99%

“…Research shows that genetic enhancement of the cocoa tree has managed to progress in the selection of cultivars resistant to witches’ broom (Ahnert et al, 2018; Marssaro et al, 2020). In the state of Bahia, Brazil, the first cultivars with specificity of resistance to witches’ broom were launched in 1997 by CEPLAC; however, they lost resistance to witches’ broom in a short space of time, were incapable of self‐fertilization, and there were problems with low productivity.…”

Section: Control Strategiesmentioning

confidence: 99%

“…Besides being resistant to witches’ broom, these new varieties of cocoa tree have superior agronomic characteristics (fruit weight, seed weight, and quantity of seeds per fruit) compared to traditional, local cultivars, which are affected by M . perniciosa (Ahnert et al, 2018).…”

Section: Control Strategiesmentioning

confidence: 99%

See 4 more Smart Citations

History, dissemination, and field control strategies of cocoa witches’ broom

et al. 2021

View full text Add to dashboard Cite

The cocoa tree (Theobroma cacao) is native to the Americas, specifically South America, in the region of the Amazon Rainforest (Ploetz, 2007). Among the indigenous peoples inhabiting tropical America, the plant has such importance that it became known as the food of the gods (de Souza et al., 2018). The cocoa tree is from the Malvaceae family, which is composed of the former families Sterculiaceae, Bombacaeae, Malvaceae sensu lato, and Tiliaceae (Ploetz, 2007).The fruits of the tree, called cocoa, appear along the trunk of the plant. The beans, considered the most commercially profitable part of the plant, are inside the pods. Currently, the international trade in cocoa beans has made cocoa farming an important activity for several countries (Fiorin et al., 2018).Cocoa bean production is the basis of the billion-dollar industry of cocoa transformation (Moretti-Almeida et al., 2019). Various products are obtained from the beans, chocolate being the most important and well known (Pimenta Neto et al., 2018;de Souza et al., 2018). Cocoa is produced in countries in Africa, Asia, South America, and Central America among others; however, Africa is the largest producer in the world (Pimenta Neto et al., 2018). Among the cocoa-producing countries, Ivory Coast (Côte d'Ivoire), Ghana, and Indonesia stand out, as they are responsible for more than half of the world production of cocoa beans (Campos-Vega et al., 2018).

show abstract

Section: Control Strategiesmentioning

confidence: 99%

Section: Control Strategiesmentioning

confidence: 99%

Section: Control Strategiesmentioning

confidence: 99%

Section: Control Strategiesmentioning

confidence: 99%

Section: Control Strategiesmentioning

confidence: 99%

See 3 more Smart Citations

History, dissemination, and field control strategies of cocoa witches’ broom

et al. 2021

View full text Add to dashboard Cite

show abstract

Edaphic and physiographic attributes and death of cacao trees in drought years

et al. 2023

Self Cite

View full text Add to dashboard Cite

Occurrence of more frequent events of prolonged periods of low rainfall (drought) in worldwide cacao (Theobroma cacao L.) production zones has not only compromised productivity of small farmers but also crop survival. This study aimed to evaluate how and to what extent cacao tree mortality in dry years is related with variations in soil and physiographic features. The rate of mortality of cacao trees cultivated under an agroforestry system was evaluated over three periods (1994-1995, 2009-2013, and 2015-2019) on 36 plots of a farm in Bahia, Brazil, which has a wide diversity of soils and is established in a region with a subhumid to dry climate. Correlation analyses (single and multiple), cluster analysis, and Tukey tests were performed. The explanatory variables studied were the attributes of two soil layers (physical, mineralogical, and chemical), the diagnostic horizon, and the physiographic attributes (slope, terrain orientation in relation to the sun, and crop shading). The edaphic attributes most related to cacao tree mortality were physical (granulometry, porosity, and density) and mineralogical (Ki), mainly in the subsurface layer. The lowest mortality was observed in Oxisols and on slopes facing south and east. It was possible to establish recommend limits of the most suitable edaphic attributes to ensure greater survival of cacao trees cultivated in regions subject to recurrent water deficit similar to the conditions of this study. These findings can be used to guide farmers on how to mitigate the effect of drought. INTRODUCTIONIncrease in the frequency of drought events in the cacao (Theobroma cacao L.) production regions of the world has Abbreviations: BD, bulk density; BS, base saturation; CEC, cation exchange capacity; Ki, SiO 2 /Al 2 O 3 molar ratio; Kr, SiO 2 /(Fe 2 O 3 +Al 2 O 3 ) molar ratio; PCA, principal components analysis; PDP, percentage of dead plants; P rem , remaining P; S-value, sum of basic cations; Sl, terrain slope; SLAI, shading leaf area index; SORS, slope orientation in relation to the sun; TOC, total organic carbon; TP, total porosity.

show abstract