Número de cromossomos em Coffea racemosa Lour

silva, Hélder Lains e

doi:10.1590/s0006-87051956000100034

Cited by 4 publications

(4 citation statements)

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“…(Rubiaceae) originates from East Africa and is characterised by abundant branching, high leaf drop during the dry season and rapid fruit maturation (Guerreiro Filho, 1992). C. racemosa produces a pale coloured aromatic beverage that is low in caffeine (Silva, 1956;Mazzafera, 1990) and of medium quality (Chevalier, 1947). It is consumed locally in several countries in East Africa (e.g.…”

Section: Introductionmentioning

confidence: 99%

“…Mozambique), but is not commercially exploited as a result of its low productivity. Like most Coffea species, C. racemosa is diploid (2n = 2x = 22) and allogamous, with several self-incompatibility alleles (Silva, 1956;Mô naco & Carvalho, 1972). This species has several other interesting agronomical characteristics, which have been transferred to commercial coffee varieties by traditional breeding programmes.…”

Section: Introductionmentioning

confidence: 99%

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Sucrose metabolism during fruit development in Coffea racemosa

Geromel

Ferreira

Bottcher

et al. 2007

Annals of Applied Biology

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Sucrose is one of the compounds in the raw coffee bean that has been identified as an important precursor of coffee flavour and aroma. In order to increase our knowledge of sucrose metabolism in coffee species, sucrose and reducing sugar content were investigated in the fast fruit-ripening coffee species Coffea racemosa. Fruits were harvested regularly from anthesis, until the point of complete fruit maturation and tissue development, followed by measurement of fruit tissue weight. Pericarp was the most abundant tissue, and always represented around 70-80% of fruit fresh weight. The perisperm present in young fruits was rapidly replaced by the endosperm at around 40 days after flowering (DAF). In the latter tissue, total and reducing sugars decreased during development. However, sucrose content was maintained at a relatively high level throughout fruit development, with a peak at 40 DAF that coincided with the highest level of sucrose synthase (SUS) activity detected in this tissue. For all endosperm developmental stages analysed, very low invertase activity was observed, suggesting a limited role for this enzyme in sucrose metabolism. Northern blot experiments using SUS1 and SUS2 cDNA sequences from Coffea arabica as probes were carried out to study the expression of SUS-encoding genes. The SUS1 transcripts of C. racemosa overlapped with the peak of SUS activity in the endosperm, whereas SUS2 transcripts accumulated mainly during the latest stages of endosperm development. Altogether, these results suggest that the SUS1 isoform of SUS is essential for sucrose accumulation in the fruits of C. racemosa.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Sucrose metabolism during fruit development in Coffea racemosa

Geromel

Ferreira

Bottcher

et al. 2007

Annals of Applied Biology

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“…The CIFC cultivars are certified hybrids of the Catimor group (CR-95). Coffea arabica is a tetraploid species with 2n = 44 chromosomes that usually behave genetically as diploid [ 60 ] while C. racemosa is a diploid species with 2n = 22 chromosomes [ 61 ]. In each site, 6 to 10 individuals were randomly collected with a minimum sampling distance of 10 m. Samples, locations, and geographic coordinates are shown in Table S1 .…”

Section: Methodsmentioning

confidence: 99%

Genomic Evaluation of Coffea arabica and Its Wild Relative Coffea racemosa in Mozambique: Settling Resilience Keys for the Coffee Crop in the Context of Climate Change

Tapaça,

Mavuque,

Corti

et al. 2023

Plants

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Climate change is negatively affecting the coffee value chain, with a direct effect on approximately 100 million people from 80 countries. This has been attributed to the high vulnerability of the two-mainstream species, Coffea arabica and Coffea canephora, to extreme weather events, with notable uneven increases in market prices. Taking into account the narrow genetic plasticity of the commercial coffee cultivars, wild-relatives and underutilized Coffea species are valuable genetic resources. In this work, we have assessed the occurrence of Coffea species in to understand the degree of genetic relationships between Coffea species in the country, as well as the patterns of genetic diversity, differentiation, and genetic structure. Only one wild species was found, C. racemosa, which showed a high level of genetic separation with C. arabica, based on plastid, as well as SSR and SNP analysis. C. arabica presented low levels of diversity likely related to their autogamous nature, while the allogamous C. racemosa presented higher levels of diversity and heterozygosity. The analysis of the functional pathways based on SNPs suggests that the stress signaling pathways are more robust in this species. This novel approach shows that it is vital to introduce more resilient species and increase genomic diversity in climate-smart practices.

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“…In the review by (Guerreiro Filho, 1992) various reports are given for the flavour quality of C. racemosa. According to Silva (1956) C. racemosa provides an aromatic drink, of slightly dark colour and low caffeine; Chevalier (1947) noted from a herbarium sheet than the "Grain is considered analogous to Moka [C. arabica], it is better than any other;" and Carvalho (pers. comm.…”

Section: Introductionmentioning

confidence: 99%

Hot Coffee: The Identity, Climate Profiles, Agronomy, and Beverage Characteristics of Coffea racemosa and C. zanguebariae

Davis¹,

Gargiulo²,

Almeida³

et al. 2021

Front. Sustain. Food Syst.

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Climate change poses a considerable challenge for coffee farming, due to increasing temperatures, worsening weather perturbations, and shifts in the quantity and timing of precipitation. Of the actions required for ensuring climate resilience for coffee, changing the crop itself is paramount, and this may have to include using alternative coffee crop species. In this study we use a multidisciplinary approach to elucidate the identity, distribution, and attributes, of two minor coffee crop species from East Africa: Coffea racemosa and C. zanguebariae. Using DNA sequencing and morphology, we elucidate their phylogenetic relationships and confirm that they represent two distinct but closely related species. Climate profiling is used to understand their basic climatic requirements, which are compared to those of Arabica (C. arabica) and robusta (C. canephora) coffee. Basic agronomic data (including yield) and sensory information are provided and evaluated. Coffea racemosa and C. zanguebariae possess useful traits for coffee crop plant development, particularly heat tolerance, low precipitation requirement, high precipitation seasonality (dry season tolerance) and rapid fruit development (c. 4 months flowering to mature fruit). These attributes would be best accessed via breeding programs, although these species also have niche-market potential, particularly after further pre-farm selection and post-harvest optimization.

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Número de cromossomos em Coffea racemosa Lour

Cited by 4 publications

References 0 publications

Sucrose metabolism during fruit development in Coffea racemosa

Sucrose metabolism during fruit development in Coffea racemosa

Genomic Evaluation of Coffea arabica and Its Wild Relative Coffea racemosa in Mozambique: Settling Resilience Keys for the Coffee Crop in the Context of Climate Change

Hot Coffee: The Identity, Climate Profiles, Agronomy, and Beverage Characteristics of Coffea racemosa and C. zanguebariae

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