Coffee is a major cash and export crop in Sierra Leone and is mainly cultivated in southern and eastern provinces.Kenema,Kailahun,Moyamba,Bo,Pujehun and Kono are major coffee growing districts in the country.This stud...Coffee is a major cash and export crop in Sierra Leone and is mainly cultivated in southern and eastern provinces.Kenema,Kailahun,Moyamba,Bo,Pujehun and Kono are major coffee growing districts in the country.This study looks at the extent of phenotypic diversity of the rare and wild Coffea stenophylla in Kenema and Moyamba districts.The Shannon-Weaver diversity index(H')revealed variations among the samples for the observed 13 morphological traits which ranges from 0 for both fruit colour and calyx limb persistence to 0.87 for angle of insertion of primary branches on the main stem.Among the 13 morphological traits assessed,angle of insertion of primary branches on main stem(0.87),growth habit(0.78),bean size(0.75),young leaf colour(0.66),stem habit(0.66)and fruit shape(0.65)exhibited high level of diversity while seed shape(0.58),stipule shape(0.46),leaf shape(0.43),seed uniformity(0.31)and leaf apex shape(0.06)showed low levels of diversity.This is the first report of phenotypic diversity of C.stenophylla in Sierra Leone and the study thus unraveled existence of diversity among samples.It is recommended that these observed variabilities be exploited in order to develop better accessions that are high yielding yet maintain the same taste.Additionally,genetic fingerprinting needs to be applied to provide a complementary assessment of the observed phenotypic diversity.展开更多
Waste management remains a major environmental challenge.In landfills,gar bage cans,or even landfill sites,organic waste decomposes,releasing methane(CH_(4))and carbon dioxide(CO_(2)).These gases accumulate in the Ea...Waste management remains a major environmental challenge.In landfills,gar bage cans,or even landfill sites,organic waste decomposes,releasing methane(CH_(4))and carbon dioxide(CO_(2)).These gases accumulate in the Earth’s atmos-phere and absorb infrared radiation emitted by the Earth’s surface,thus con-tributing to the greenhouse effect responsible for global warming.According to the report of the 29^(th)Conference of the Parties on Climate Change held in Baku,Azerbaijan,from November 11 to 22,2024,reducing methane emissions into the atmosphere is one of the most promising ways to mitigate the increase in Earth’s temperature in the short term.This involves the recovery of organic waste from agriculture,the agri-food industry,households,restaurants,gar-dens,animal husbandry,etc.This article highlights the challenges and tech-niques that can be used in converting organic waste into bioproducts that emit fewer greenhouse gases.It constitutes a scientific contribution to the mitigation of global warming,the fight against pollution,and the promotion of the circu-lar economy and sustainable management of resources.展开更多
文摘Coffee is a major cash and export crop in Sierra Leone and is mainly cultivated in southern and eastern provinces.Kenema,Kailahun,Moyamba,Bo,Pujehun and Kono are major coffee growing districts in the country.This study looks at the extent of phenotypic diversity of the rare and wild Coffea stenophylla in Kenema and Moyamba districts.The Shannon-Weaver diversity index(H')revealed variations among the samples for the observed 13 morphological traits which ranges from 0 for both fruit colour and calyx limb persistence to 0.87 for angle of insertion of primary branches on the main stem.Among the 13 morphological traits assessed,angle of insertion of primary branches on main stem(0.87),growth habit(0.78),bean size(0.75),young leaf colour(0.66),stem habit(0.66)and fruit shape(0.65)exhibited high level of diversity while seed shape(0.58),stipule shape(0.46),leaf shape(0.43),seed uniformity(0.31)and leaf apex shape(0.06)showed low levels of diversity.This is the first report of phenotypic diversity of C.stenophylla in Sierra Leone and the study thus unraveled existence of diversity among samples.It is recommended that these observed variabilities be exploited in order to develop better accessions that are high yielding yet maintain the same taste.Additionally,genetic fingerprinting needs to be applied to provide a complementary assessment of the observed phenotypic diversity.
基金supported by the Intra-Africa Academic Mobility Scheme through the European Union’s co-funding for the project“Mobility in Innovative Green Technologies for Climate Change Mitigation and Sustainable Bioeconomy”(IN-TERACT-Africa Project).
文摘Waste management remains a major environmental challenge.In landfills,gar bage cans,or even landfill sites,organic waste decomposes,releasing methane(CH_(4))and carbon dioxide(CO_(2)).These gases accumulate in the Earth’s atmos-phere and absorb infrared radiation emitted by the Earth’s surface,thus con-tributing to the greenhouse effect responsible for global warming.According to the report of the 29^(th)Conference of the Parties on Climate Change held in Baku,Azerbaijan,from November 11 to 22,2024,reducing methane emissions into the atmosphere is one of the most promising ways to mitigate the increase in Earth’s temperature in the short term.This involves the recovery of organic waste from agriculture,the agri-food industry,households,restaurants,gar-dens,animal husbandry,etc.This article highlights the challenges and tech-niques that can be used in converting organic waste into bioproducts that emit fewer greenhouse gases.It constitutes a scientific contribution to the mitigation of global warming,the fight against pollution,and the promotion of the circu-lar economy and sustainable management of resources.
