Coffee Selection and Breeding

Vossen, H. A. M. van der

doi:10.1007/978-1-4615-6657-1_3

Cited by 74 publications

(45 citation statements)

References 45 publications

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“…The variety 74110 is identified by JARC [21] with its small sized beans and commercially accepted quality, while the variety 744 is revealed by its large sized beans and commercially accepted quality. The present finding disagrees with the findings of Van et al [22] who reported that coffee variety SL28 has big sized beans (46% AA grade size) and excellent cup quality, while Caturra and Rumen Sudan are characterized by small sized beans and lower cup quality. Yigzaw Dessalegn [23] Reported that the presence of genetic variability among Ethiopian coffee selections for green bean physical characteristics and cup quality attributes.…”

Section: Total Cup Qualitycontrasting

confidence: 99%

Impact of Sun Drying Methods and Layer Thickness on the Quality of Highland Arabica Coffee Varieties at Limmu, Southwestern Ethiopia

Mohammed¹

2014

Horticulture

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Coffee is the most important crop in the national economy of Ethiopia and continues to be still the leading export commodity. Despite the economic importance, productivity and quality of the crop is very low. Improper post-harvest processing techniques largely contribute to the decline in coffee quality. However, lack of information on the effects of post-harvest processing and drying on quality necessitates a comprehensive study. Therefore, this experiment was carried out to determine the effects of sun drying methods, variety and cherry drying layer thickness on quality of coffee at highland areas of Limmu, Jimma zone. Accordingly, on-farm processing experiments were conducted at state owned coffee farms under Limmu Coffee Plantation Development Enterprise (LCPDE) from September up to December, 2010. The experiment was laid out in 3 × 3 × 4 Split-Split-plot design arranged in CRD with three replications. The three factors comprise three drying materials: bricks floor, raised beds with bamboo mats and mesh wires assigned to the main-plots. Three coffee varieties: 744, 74110 and 744+74110 assigned to sub-plots and four levels of cherry layer thicknesses: 20; 30; 40 kg/m 2 (uniformly spread) and the farmers' conventional practices (40 kg/m 2 ) as sub-sub plot treatments. The data were computed by using list significant differences (LSD) procedures of SAS version 9.2. As a result, the interaction effects were highly significant (P ≤ 0.01) for total coffee quality and significant variations were observed (P ≤ 0.05) for drying period, total raw quality, total cup quality and coffee grades. The finding revealed that; processing coffee on raised beds using appropriate layer thickness loads of 20 to 40 kg/m 2 at high altitudes produce quality coffee identified as total quality scores ranging 80-89.99 points and can attain "Specialty Grade 1 and 2" classification profiled under grade 2. While, the conventional systems produce low quality coffee identified as commercial grade classifications profiled under grade 3 to 4. Hence, using appropriate dry processing approaches, it is possible to produce specialty coffee.

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Section: Total Cup Qualitycontrasting

confidence: 99%

Impact of Sun Drying Methods and Layer Thickness on the Quality of Highland Arabica Coffee Varieties at Limmu, Southwestern Ethiopia

Mohammed¹

2014

Horticulture

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“…The exploitation of genetic resources from the wild Coffea is essential for the development of inbred lines, which can be adapted to new production systems and also to overcome possible challenges from the world market (Carvalho et al, 1985). Nevertheless, breeding programs are limited due to the narrow genetic base of coffee, especially for pest and disease resistance improvement (Van der Vossen, 1985). Nowadays, C. canephora provides the main source for resistance genes not found in C. arabica, including leaf rust (Hemileia vastatrix), coffee berry disease (CBD) caused by Colletotrichum kahawae, and resistance to root-knot nematode (Meloidogyne sp) (Lashermes et al, 2000).…”

Section: Introductionmentioning

confidence: 99%

Assessment of genetic variability within and among coffee progenies and cultivars using RAPD markers

Silveira

Ruas

et al. 2003

Genet. Mol. Biol.

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The RAPD technique associated with restriction digestion of genomic DNA was used to assess the genetic variability within and among nine populations of Coffea arabica, including six progenies belonging to the Sarchimor germplasm, the progeny PR 77054-40-10 (Catuaí Vermelho IAC 81 x Icatu), and two commercial cultivars (IAPAR 59 and Catuaí Vermelho IAC-81). These populations were evaluated using analysis of molecular variance (AMOVA), genetic similarity among progenies, and percentage of polymorphic loci. A total of 99 RAPD markers were evaluated of which 67 (67.67%) were polymorphic. AMOVA showed that 38.5% and 61.5% of the genetic variation was distributed among and within populations, respectively. The fixation index (F ST ) of the genotypes was 0.385. The mean genetic variability estimated within populations ranged from 15.58 (IAPAR 59) to 8.27 (Catuaí Vermelho IAC 81). A distinct level of genetic variability was revealed for each of the coffee progenies and varieties studied. The methodology used in this investigation was useful to determine the genetic variability within and among C. arabica L. populations providing significant information for coffee breeding.

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“…Populations of C. arabica have been also reported (Berthaud & Charrier, 1988) in Mount Imatong (Sudan) and Mount Marsabit (Kenya) . The large number of named varieties and selections of arabica coffee belies the actually very narrow genetic diversity of the base populations from which they were selected (van der Vossen, 1985) . Historical evidence indicates that these base populations all descended from the few trees that survived various efforts to spread arabica coffee from Southern Arabia, now Yemen, into the main coffee producing areas in Latin America, East Africa and Asia.…”

Section: Introductionmentioning

confidence: 99%

Genetic diversity for RAPD markers between cultivated and wild accessions of Coffea arabica

Lebailly¹,

Trouslot²,

Anthony

et al. 1996

Euphytica

132

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Coffee Selection and Breeding

Cited by 74 publications

References 45 publications

Impact of Sun Drying Methods and Layer Thickness on the Quality of Highland Arabica Coffee Varieties at Limmu, Southwestern Ethiopia

Impact of Sun Drying Methods and Layer Thickness on the Quality of Highland Arabica Coffee Varieties at Limmu, Southwestern Ethiopia

Assessment of genetic variability within and among coffee progenies and cultivars using RAPD markers

Genetic diversity for RAPD markers between cultivated and wild accessions of Coffea arabica

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