Genotypic Performance of Cocoa (<i>Theobroma cacao</i>L.) during Establishment under Natural Drought Stress

Ofori, Atta; Konlan, S.; Dadzie, Mustapha Abu; Amoah, F. M.

doi:10.1080/15427528.2014.947529

Cited by 9 publications

(6 citation statements)

References 15 publications

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“…In cocoa, Lachenaud and Montagnon (2002) studied differences in vigour of individual trees in full-sib families and observed that high coefficient of variation in tree-to-tree bean yields were related to differences in tree vigour. Ofori et al (2014) found that more vigourous genotypes had higher survival rates than less ones under moisture stress conditions in cocoa, during field establishment. Given the importance of the relationship between vegetative vigour and productivity, a selection criterion in coffee involving vegetative growth traits during the juvenile phase of the crop would go a long way to facilitate Robusta coffee breeding efforts.…”

Section: Introductionmentioning

confidence: 93%

Early selection for yield in robusta coffee based on juvenile growth traits

Akpertey¹,

Anim-Kwapong²,

Ofori³

2019

Afr. Crop Sci. J.

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Section: Introductionmentioning

confidence: 93%

Early selection for yield in robusta coffee based on juvenile growth traits

Akpertey¹,

Anim-Kwapong²,

Ofori³

2019

Afr. Crop Sci. J.

Self Cite

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“…This SPAD reading was also an effective non-destructive tool for assessing total chlorophyll concentration and content across a range of genotypes, growing conditions and plant ages (Hawkins 2009). Other studies also mentioned a positive and significant correlation between SPAD reading and chlorophyll content such as in Arabidopsis (Ling et al 2011), thirteen tree species of tropical rainforest in French Guiana (Coste et al 2010), cacao (Ofori et al 2014), salad and parsley (Tuncay 2011) and butterhead lettuce (León et al 2014). The combination of chroma meter and SPAD measurement on cacao leaf flush in correlation with white bean percentage/pod will be investigated in this study.…”

Section: Introductionmentioning

confidence: 96%

Genetic diversity and indirect selection of fine cacao (Theobroma cacao) based on bean color

Devy¹,

Sari

Susilo

et al. 2018

Biodiversitas

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Devy L, Anita-Sari I, Susilo AW, Wachjar A, Sobir. 2018. Genetic diversity and indirect selection of fine cacao (Theobroma cacao) based on bean color. Biodiversitas 19: 2385-2392. Specialty fine cacaos performed higher price than the bulk thereby the breeding of fine cacao clones become essential. However as perennial tree, cacao clones will be delivered in 15-20 years. Therefore, early detection marker and genetic diversity information will support the fine cacao breeding program. This study aimed to determine genetic parameters and early selection marker of leave flush trait to differentiate fine and bulk cacaos based on white bean percentage/pod (WBP). The research was conducted on 4 fine and 4 bulk cacao clones in two seasons with different rainfall intensities. Observations performed on WBP, flush color (L*, a*, b*, C*, Ho), anthocyanin content (A), SPAD value (S), A/S and S/A. Analysis of variance and T-test result showed that b* and C* were able to differentiate fine from bulk cacaos and stable in two seasons. Almost all traits showed narrow genetic variability except WBP. However, three of them showed high heritability. Traits correlated with WBP were L*, a*, b*, C* and anthocyanin content. However, the trait with high heritability, stable in two seasons, performed differently in two cacao types based on T-test and showing high direct correlation with WBP was only b* (yellow color). Fine cacao showed higher b* than the bulk. Therefore b* of the flush could be considered as a selection marker of fine cacao.

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“…Cacao is a shade-tolerant species found in tropical regions under shade trees or without shade at altitudes between 0 and 500 masl and with an average annual precipitation above 1500 mm. Despite these precipitation levels, cacao is subjected to periods of drought that vary in duration and severity between regions (Ofori et al, 2014;Tezara et al, 2020). Long periods of drought can have substantial negative impacts on cacao tree growth, where younger trees are more sensitive than older ones (Moser et al, 2010;Lahive et al, 2018).…”

Section: Introductionmentioning

confidence: 99%

Differential response of photosynthetic activity, leaf nutrient content and yield to long-term drought in cacao clones

et al. 2022

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Cacao (Theobroma cacao L.) is not frequently cropped in water limited environments, however it is cultivated in several drought-prone regions, where soil water is gradually depleted on an annual cycle. In regions where cacao is subjected to long periods without precipitation, the physiological responses under field conditions may differ between cacao clones. Evaluation of these responses are required to select potential clones that could be used for breeding programs in the context of future climatic scenarios. In order to identify physiological and yield responses to drought of 10 Ecuadorian cacao clones, relative leaf water content (RWC), CO2 assimilation rate (A), transpiration (E), stomatal conductance (gs), water use efficiency (WUE), relative quantum yield of photosystems II (ΦPSII), non-photochemical quenching (NPQ), leaf nutrient content (N, P K, Ca, and Mg) and yield were assessed during the dry (DS) and rainy seasons (RS). On average, A and E decreased by 33 and 22 %, respectively under drought, whereas WUE was higher during RS. Clones exhibited an increase in NPQ during DS, suggesting greater energy dissipation. Clones showed differences in macronutrient content and in most cases drought caused a reduction in Ca and Mg content. Two groups were established according to yield: one which maintained higher yields during RS, while the other had higher yields during drought. This offers strategic alternative in order to maintain a relatively high yield throughout the year with combination of clones in the plantations.

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Genotypic Performance of Cocoa (Theobroma cacaoL.) during Establishment under Natural Drought Stress

Cited by 9 publications

References 15 publications

Early selection for yield in robusta coffee based on juvenile growth traits

Early selection for yield in robusta coffee based on juvenile growth traits

Genetic diversity and indirect selection of fine cacao (Theobroma cacao) based on bean color

Differential response of photosynthetic activity, leaf nutrient content and yield to long-term drought in cacao clones

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