To make operational on-farm crop genetic conservation strategy in Ethiopia, we havernto understand the factors that determine farmers' for managing portfolios of croprnvarieties. Identifying farmers ' derived demand for sorghum varieties and drawingrnpolicy implication for on-farm genetic resources conservation in Ethiopia is the mainrnobjective of this paper. Farmers' preferences for varieties conditioned on differentrnpreference parameters are the theoretical bas is for this study. Count index andrnShannon index are used to measure the on-farm sorghum genetic diversity of thernstudied area. Poisson and Tobit regression models are estimated using a ruralrnhousehold survey data collected from 205 households in Tehuledere Woreda, AmhararnNational Regional State of Ethiopia.rnrnThe findings of empirical estimation shows that family size of the household, landrncharacteristics, concern factors, number of oxen ownership and access to cash cropsrnare promoting factors for variety richness of sorghum genetic diversity in farmrnhousehold. On the contrary, the most important factors detaching the link betweenrnfarmers survival strategy and sorghum genetic diversity are access to extensionrnservices, experience on using improved varieties, access to road infrastructure andrnaccess to market services. The results imply that on-farm crop genetic resourcernconservation will be negatively correlated to the over-all agricultural development inrna specific region. Therefore, there is a need for flexible incentive structures tornmaintain CGRs diversityrnat a social optimum and to off-set the negative effect ofrndevelopment interventions.