Genetic Diversity of Wild Populations of Arabica Coffee (Coffea Arabica L.) in Yayu Forest of Ethiopia Using Inter-Simple Sequence Repeat (Issr) Marker

dc.contributor.advisorGizaw, Abel
dc.contributor.advisorFikru, Edossa
dc.contributor.authorOljira, Tamiru
dc.date.accessioned2018-07-11T10:15:46Z
dc.date.accessioned2023-11-08T16:33:08Z
dc.date.available2018-07-11T10:15:46Z
dc.date.available2023-11-08T16:33:08Z
dc.date.issued2006-07
dc.description.abstractArabica coffee (Coffea arabica L.), which contributes over 70 percent of the world's coffee productions, is characterized by a low genetic diversity, attributed to its allopolyploidy origin, predominately self-pollinating nature and its recent evolution. A total of 81 wild coffee trees from four populations of Yayu (Geba-Dogi) forest and Sore forest (only thee samples for comparison) were used to assess the within and among populations genetic diversity using inter-simple sequence repeat (ISSR) marker. Two populations (Yayu-1 and Yayu-2) are from disturbed region of the forest and two populations (Yayu-4 and Yayu-5) are from undisturbed region of the forest. The samples range in age from about 2 years old to very old trees. Larger genetic diversity estimate was observed for Yayu-2 (P=27.27%, H=0.079, H’j=0.175) and lower for Yayu-4 (P=10.91%, H=0.31, H’j=0.07). Individuals in disturbed regions are clearly distinguished from those in undisturbed regions on dendrogram generated based on Jaccard similarity coefficient and unweighted pair-group method using arithmetic averages (UPGMA). Smaller genetic distance exists between Yayu-1 and Yayu-2 (0.011) and larger genetic distance exists between Yayu-1 and Yayu-4 (0.109). Larger proportion of the total genetic diversity exists within population (above 55%), which is the pattern for populations with mixed-mating. The results of the present study suggest that coffee populations in the semi-disturbed regions of the forest have higher genetic variability and need to be given priority for both in situ and ex situ conservation as well as for breeding purposes. Those from undisturbed populations should also be conserved as they may have some unique genes. Key words: Coffea arabica, ISSR, Yayu, intraregional diversity, Ethiopiaen_US
dc.identifier.urihttp://etd.aau.edu.et/handle/123456789/7986
dc.language.isoenen_US
dc.publisherAddis Ababa Universityen_US
dc.subjectCoffea arabicaen_US
dc.subjectISSRen_US
dc.subjectYayuen_US
dc.subjectintraregional diversityen_US
dc.subjectEthiopiaen_US
dc.titleGenetic Diversity of Wild Populations of Arabica Coffee (Coffea Arabica L.) in Yayu Forest of Ethiopia Using Inter-Simple Sequence Repeat (Issr) Markeren_US
dc.typeThesisen_US

Files

Original bundle
Now showing 1 - 1 of 1
No Thumbnail Available
Name:
Tamiru Oljira.pdf
Size:
1.47 MB
Format:
Adobe Portable Document Format
License bundle
Now showing 1 - 1 of 1
No Thumbnail Available
Name:
license.txt
Size:
1.71 KB
Format:
Plain Text
Description:

Collections