Greener Journal of Agronomy, Forestry and Horticulture Vol. 3 (1), pp. 001-010, January 2015.
ISSN: 2354-2306 © 2015 Greener Journals
Manuscript Number: 061614271
Genetic Variation and Extent of Heritability of the Various Agronomic Traits of Arabica Coffee (Coffea Arabica L.) Genotypes Grown across different Environments in Ethiopia
Yonas Belete*1 and Tarekegn Argaw2
1 Plant Breeder, Jimma Agricultural Research Center, P.O. Box, 192, Jimma, Ethiopia.
2 Biometrician, Jimma Agricultural Research Center, P.O. Box, 192, Jimma, Ethiopia.
*Corresponding Author’s Email: yonasbelete85 @yahoo. com
The genetic variation and heritability estimates of various agronomic traits of Arabica coffee genotypes were evaluated from trials carried out at multi-locations. The mean differences among genotypes and genotype by environment interactions for the various agronomic traits: yield, coffee berry disease (CBD), Coffee leaf rust (CLR) severity, cherry weight, hundred beans weight (HBW), outturn, bean length, bean width, parchment length, floated beans percent, plant height, stem girth, number of primary branches (NPB), internode length and canopy diameter of arabica coffee were highly significant (p<0.01). On this basis, the heritability estimates of those traits which have much to do with bean quality and morphological characters (which have much to do with plant population per unit area that determines productivity) exhibited higher heritability values that ranged from 52.42 to 73.17 %. This indicates that the different coffee types in Ethiopia shows high genetic variations for these traits and therefore, bean quality and productivity can be improved. On the other hand, heritability of yield, resistances to coffee berry disease and leaf rust diseases were below 26.19 % showing that the earlier selection practiced during the preliminary evaluation at Gerato advanced the desirable types for these traits and reduced their variability to have a negative effect on their heritability estimates in this particular study, but, this does not indicate that there is less hope in improving them for economic use because random samples from a parent population has wide variability for the stated traits in Ethiopia.
Key words: Agronomic Traits, Arabica Coffee, Heritability, Genetic Variation.
Allard RW (1960). Principles of Plant Breeding. NewYork. (Wiley, NewYork). 485p.
Briggs F. N. and Knowles PF (1967). Introduction to Plant Breeding (Reinhold, U.S.A.) pp. 386
Anon (1995). Terms of reference for EC Ethiopian coffee improvement Program phase III. Agrisystem Ltd. Uk, Mimeo, 19 pp. In: Vander Vossen. 1997. Quality aspects in Arabic Coffee Breeding Programs in Africa. Asic 17 e Colloque, Nairobi.
Behailu W, Abrar S, Nigussie M and Solomon E (2008). Coffee processing and quality research in Ethiopia. In the proceedings of Coffee diversity and Knowledge Workshop EIAR, Addis Ababa, P. 345-356.
Cengiz T (2004). Estimates of broad-sense heritability for seed yield and yield criteria in faba bean (Viciafaba L.). Journal of Hereditas. ISSN: 3, Vol. 140, pp. 222–225.
Cliford MN and Wilson K L (1985). Coffee: Botany, Biochemistry, and Production of Beans and Beverage. Croom Helm. London.
Dahiya B.S, Brar JS and Bajai, RK (1977). Regression, correlation and combining ability of some quantitative characters in peas (Pisumsativum L.). J.Agri. Sci. Camb. 88: 759-763.
Delacy IH, Basford KE, Cooper M, Bull JK and Mclaren C G (1996). Retrospective analysis of historical data sets from multi-environment trials-theoretical development. In: Plant Adaptation and Crop Improvement. (Eds M.Cooper and G.L.Hammer. pp. 243-67. (CAB. International Wallingford, UK.)
Desse N (2008). Mapping quality profile of Ethiopian coffee by origin. In the Proceedings of Coffee Diversity and Knowledge Workshop EIAR, Addis Abeba, P.317-27.
Eshetu D(1997). Coffee disease and their significance in Ethiopia. In: Asic17th Kenya, Nairobi. VI, Pp723-26.
Kassahun T,Tamiru O, Kim G, Endashaw B and Thomas B (2008). Genetic diversity and population structure of wild coffee Arabica population in Ethiopia using molecular markers. In the Proceedings of Coffee Diversity and Knowledge Workshop. EIAR, Addis Abeba, P.317-27
Mesfin A and Bayetta B (1987). Genotype- environment interaction in coffee, Coffea arabica L. (submitted to EJAS for publication).
Mesfin A (1980). Yield assessment of a collection of indigenous coffee (C. arabica L.) grown at Jimma research center. Eth. J. Agr. sci. 2(2) 69-71
Srinivasan CS (1982). Pre-selection for yield in coffee. Indian J. of Gent and plant Breed. 42:15-19.
Umakam AV, Satyanarayana E, Negash Kumar MV. Correlation and heritability studies in Ashwin maize composite. Journals of Annals of agricuural research. ISSN. 0970-3179Vol 21. (3).pp 328-330
Vander graaf NA (1978). Selection for resistance to coffee berry disease in arabica coffee in Ethiopia. Evaluation ofselection methods Neth.J. Pl. Path., 84:205-215. Plant prof.
Van der graaf NA (1981). Selection of arabica coffee types resistance to CBD in Ethiopia. Doctoral thesis.Mededlingenlandbouwhoge School, Wageningen, the Netherlands. llo pp.
Walyaro DJ(1985). Consideration in breeding for improved yield and quality in arabica coffee by applying index selection. Euphytica, 28: 465-72.
Welsh JR (1981). Fundamentals of plant genetics and breeding Wiley: New York. PP. 272.
Yacob E, Tesfaye S, Alemseged Y, Taye K, Anteneh N, Takele N, and Bekele B (1996). Advances in coffee agronomy research in Ethiopia. In: Tenywa JS, Adipala Ekwamu, MW Ogengalatogo (eds). Proceedings of Inter-Africa Coffee Organization (IACO) Workshop, 4-6 Sept., 1995, Kampala, Uganda. pp 40-45.
Yonas B and Bayetta B (2008). Genotype by environment interaction and stability analysis of Arabica genotypes. Proceedings of Coffee Diversity and Knowledge Workshop EIAR, Addis Abeba, P. 58-63.
Yonas B(2014).Stability Analysis of performance of Hundred Beans Weight of Arabica Coffee Genotypes across Different Environments. Time Journals of Agriculture and Veterinary Sciences Vol. 2(5):99-106.
Call for Papers/Books/Thesis
Call for Scholarly Articles
Authors from around the world are invited to send scholary articles that suits the scope of this journal. The journal is currently open to submissions and will process and publish articles monthly in two yearly issues.
The journal is centered on quality and goes about its processes in a very timely fashion. Seasoned editors/reviewers will be consulted to review each article(s), profer quality evaluations and polish the articles with expertise before publication.
Simply send your article(s) as an e-mail attachment to firstname.lastname@example.org or email@example.com.
Call for Books
You are also invited to submit your books for online or print publication. We publish books related to all academic subject areas. Submit as an e-mail attachment to firstname.lastname@example.org.