Towards domestication of Kihansi wild coffee (coffea Kihansiensisy): population dynamics, propagation and diversity
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Date
2018
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Publisher
Sokoine University of Agriculture
Abstract
Potential of this wild co flee can be utilized as gcneiic resource for coffee breeding
program and/or domeslicalion but iintbriunalcly ihe population struciurc. propagation
poienlial and genetic variability of the discovered Kihansi wild co flee is poorly known.
1'herefbre. characlerizalion and population study is highly needed hence, this study aims
to (i) Assessing the population chnamics of Coflea kihunsiensis (ii) Optimizing vegetative
propagation of Coffeu kihansiensis (iii) Characterizing morphological traits of Kihansi
wild coffee kiluuisiensis) and (iv) Assessing lhe gcneiic diversity of Kihansi wild
co Hee. Populaiion dynamics assessment using quadrat method was done. Variability of
population density, lowest in lower upper and upper block while highest population
density was observed in lower spray. High proponional of matured plant were observed in
both two seasons wiih lowest number of dead plants. In optimizing vegetative
propagation, sand as propagation media provided promising results with good rooting
ability, high survival rate and highest root number compared to decomposed rice husks
(DRH) and un-dccomposcd rice husks (UDRH). About 62.52 % and 72.42 % population
variation detected based on vegetative and icpioduciive traits respectively. Plant habit.
branching habit, angle of* primary branches, berr、and cherry length, width and diameter
are lhe most signiilcant traits expressed the morphological variations. These variations
were confirmed in genetic diversity study using SSK markers. About 97 % of the total
variation was detected within populations. Four clusters varied at 60 % were obtained.
These findings are useful in planning conservation and management strategies while
providing insight on utilization of this coffee as genetic resource for coffee improvement.
Key words: Coffeu kihansiensis. genetic variability, population density and improvement.
Description
Dissertation
Keywords
Coffee industry, Wild coffee, Coffee plant habit, Coffea Kihansiensisy, Population dynamics