Collection, Characterizaton and Conservation of Genetic Resources of Yam Cultivars From Ekiti State, Nigeria

Author(s):  
Julius Olaoye Faluyi ◽  
Joshua Olumide Matthew ◽  
Sekinat Okiki Azeez

Abstract This study was initiated to restore the genetic resources of yam which had been decimated in a core yam-producing community in Ekiti State, Southwestern Nigeria. Twenty cultivars, consisting of Dioscorea rotundata, D. cayenensis, D. alata, and D. dumetorum were identified, collected, characterized and multiplied using an On-farm Participatory Method. The yam cultivars were characterized for quality and yield of pounded yam (iyan) as well as starch properties. They were later conserved in the Teaching and Research Farm of the Obafemi Awolowo University Ile-Ife.Morphological characterization separated Dioscorea alata (Ewura) by its winged vines while Dioscorea dumetorum (Esuru) was separated by its pubescent spines, trifoliate leaf with acute apex and base and the clustered, irregularly-shaped tuber. All the tubers of the yam cultivars had high storability. Pounded yam quality rated the Ikumo and Ajimokun cultivars as best while Odo was rated average and this was attributed to the swelling properties and amylose content of these cultivars. Yam cultivars with high granules had low swelling capacities. The Brittle Fraction Index of the starch from all the cultivars was lower than 1.0 explaining why the iyan they produced had no crust on the surface and kept for long hours after preparation.From this study, it was concluded that the local yam cultivars collected represent the core of yam genetic resources for utilization in the region. These cultivars are therefore recommended for prioritization in further studies on propagation, conservation and improvement so that a narrow genetic base of cultivars is not encouraged, for example, by promoting cultivars whose vines perform well in tuberization.

2021 ◽  
pp. 127-130
Author(s):  
F. Paprstein ◽  
J. Sedlak ◽  
P. Brandova

1971 ◽  
Vol 6 (6) ◽  
pp. 254-260 ◽  
Author(s):  
Helen Newton Turner

During the course of perhaps 10,000 years, man has domesticated for one purpose or another a very large number of animals, mostly mammals and birds. In many cases wild stocks of these animals have been greatly reduced while the domesticated animals themselves have been bred along specific lines to meet current requirements. Future needs may conceivably be somewhat different. What, then, can be done to conserve genetic resources in order to meet these needs ?


Genetika ◽  
2004 ◽  
Vol 36 (3) ◽  
pp. 221-227
Author(s):  
Jelena Aleksic ◽  
Sasa Orlovic

Principles of the conservation of genetic resources of elms (Ulmus spp) do not differ fundamentally from the general principles accepted for the conservation of genetic resources of other common Noble Hardwoods. Efficient conservation can best be achieved through appropriate combination of in situ and ex situ methods, which have distinct advantages. Besides that, ex situ conservation is employed when emergency measures are needed for rare endangered populations and when populations are too small to be managed in situ (e.g. risks of genetic drift and inbreeding). The aim of our research is ex situ conservation of genetic resources of field elm {Ulmus minor Mill) and European white elm (Ulmus laevis Pall) through establishment of field genebanks. Sampling was conducted in one population of field elm and one population of white elm. Plant material (buds) from 8 trees of field elm and 10 trees of white elm was used for in vitro production of clones. Obtained clones will be used for establishment of field genebanks on the experimental estate of the Institute of Lowland Forestry and Environment.


Author(s):  
Jahangir Ahmad Dar ◽  
Masrat Kareem ◽  
Sajad Majeed Zargar ◽  
Aijaz A. Wani ◽  
Sheezan Rasool ◽  
...  

Author(s):  
Jean Hanson ◽  
Rainer Schultze-Kraft ◽  
Michael Peters ◽  
Peter Wenzl ◽  
Ahmed Amri ◽  
...  

Abstract This chapter outlines the scientific and development impacts of forage diversity conservation, characterization and distribution work under the international network of forage collections in CGIAR. The focus for the future will continue to be on the core operations that are essential to conserve and manage the diversity with increased emphasis on those that will ensure efficiency and value for money in gene bank operations. In addition to these essential activities, there are opportunities to be more forward and outward looking and to link with activities in the Livestock CRP and the Excellence in Breeding Platform, as well as to contribute to the global system of plant genetic resources, support the FAO Global Plan of Action and contribute to the Sustainable Development Goals.


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