Abstract
Ethiopia is the center of genetic diversity of Arabica coffee (Coffeaarabica L., Rubiaceae). In receipt of more information on genetic variability is a must for additional enhancement of coffee (Coffeaarabica L.). An experiment was carried out at Awada Agricultural Research Sub Center, Ethiopia, to study the amount of phenotypic diversity between southern coffee (Coffeaarabica L.) germplasm accessions on a quantitative character. Entirety 104 entries consisting of 100 accessions from southern parts of Ethiopia and four standard cultivars were evaluated using augmented design. The key goal of the study was to assessphenotypic and genotypic variances, the broad sense heritability, genetic advance and estimate the principal component among various quantitative characters. Data on 22 quantitative traits were recorded from five envoy trees per row for each accession. One hundred and four Arabica coffee accessions were grouped into four distinct groups by cluster analysis indicating a wide genetic diversity of coffee genotypes. Cluster I, II, III and IV contained 04 (3.85%), 29 (27.89%), 66 (63.46%) and 05 (4.81%) of the accessions, respectively. The X2 test show that inter cluster squared distances were significant at p<0.01 and p<0.05. Highest inter-cluster distance (D2) was found among cluster I and IV (D2 =102.61), even as the minimum inter-cluster distance (D2) was obtained between cluster II and III (13.26). First 8 principal components with Eigen values more than one were dependable for about 76.34% of the total variation among the germplasmaccessions. Normally, the present study revealed the existence of immense genetic variability among coffee germplasm for various important morphological traits. Consequently, there is a possibility to make use of these traits to expand genotypes that do superior than the existing varieties for the upcoming coffee enhancement plan.
Highlights
Coffee is a permanent field crop which belongs to the genus Coffeain the Rubiaceafamily and is mostly grown in the tropical and subtropical areas [5]
The details of the genetic diversity and relationships existing in C. arabica collections are vital for setting up breeding approach and germplasm conservation
In arabica coffee [6] and [7] reported genetic yield upgrading is most likely to succeed in the use of genetically diverse elite parental lines in the breeding planned that are distinctly different in their morphological characteristics. [38], on the other hand, reported that better performance of coffee hybrid for yield and for most of yield related traits in crosses linking diverse parents with respect to geographical origin balance to crosses having parents of comparable geographical origin. [34], reported divergence analysis is performed to see the diverse genotypes for hybridization purpose so that genotypes set together are less divergent than genotypes which fall into different clusters, mainly clusters divided by the largest numerical distance (D2) show the utmost difference
Summary
Coffee is a permanent field crop which belongs to the genus Coffeain the Rubiaceafamily and is mostly grown in the tropical and subtropical areas [5]. In spite of the availability of coffee genetic diversity in the country, coffee genetic resources are under grave pressure of loss, mostly due to deforestation, substitute of traditionally grown landrace by a small number of new released enhanced varieties, environmental degradation and vary in land utilize [39]. It is relevant and necessitate of the coffee breeders’ to collect, pick and develop coffee varieties which are high yielder, disease resistant and most excellent cup quality which can meet up the clients command.
Sign-in/Register to view highlights & summary Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
