Impact of Germplasm Research Spillovers: The Case of Sorghum Variety S 35 in Cameroon and Chad

摘要: An important objective of international agricultural research inst i tut ions is to determine the extent which under taken in one location may impact on other regions interest. Thi s because activities are most often planned target mandate crops and agroecological areas found many parts the world. ICRI S A T has, as a pol icy, disributed a wide range parental materials breeding programs NARS and private seed industries throughout semi-arid tropics. This has cont r ibuted faster cost-effective development useful final products by receiving parties. Thi study evaluates impacts spillover effects adopt ion sorghum variety S 35, pure line developed f rom program India. It was later advanced Niger ia promoted released Cameroon 1986 Chad 1989. Today, 35 occupies about 33% total rainfed area 2 7 % in Chad. Compared farmers' best t radi ional varieties across all sites and Chad, yields more output (grain) reduces uni product cost 20%.These farm-level larger where yield gain 5 1 higher reduct is 3 3% higher. Th e net present value benefits Af ican region estimated be US$ 15 mi l 4.6 Cameroon, representing internal rates return 9 5% Cameroon. These impacts were evaluated perspective nat systems. conscious decision, therefore, made include only those costs associated wi h and extension ions. Al 35-related development expenditures incur red India were treated 'sunk costs', that is, woul d have occur anyway thout spillover. Ha each count ry had develop associated management practices its own, ime lag between release the technology have been longer consequently impacts, if any, been smaller. For greater effectiveness technology transfer the region, future icy actions should take advantage spillovers through col laborat ion, communicat networking , regional , and internat