{"title":"对埃塞俄比亚作物品种选择环境与生产环境不匹配的关注","authors":"G. Keneni","doi":"10.4314/EAJSCI.V1I2.40347","DOIUrl":null,"url":null,"abstract":"Crop production plays a significant role in the Ethiopian economy. The sub-sector\\'s output has, however, been very low partially due to the biophysical challenges constraining productivity in smallholder farms and inadequate technological interventions. Genetic modification of crops to improve productivity is preferred to the continual manipulation of the growing environment because of cost particularly to the large majority of resource-poor farmers who cannot afford for production inputs. Consideration of varietal selection vis-a-vis\nactual target production environment is vital to maximizing gains from breeding efforts. The tradition across most of the breeding programs in Ethiopia is to develop varieties under optimum management despite the fact that marginal management characterizes the ultimate target production environments. Whether selection under optimum management is likely to result in better productivity gain than under the actual target production\nenvironments is a crucial issue in varietal development. This paper discusses the logical framework for breeding success and the conventional approach to varietal selection and its challenges in Ethiopia. Based on the analyses, the paper proposes that the wheel of the current variety development schemes should be redirected and made more objective and focused towards better serving the major target beneficiaries, i.e. the resource-poor farmers. Keywords : Direct Selection; Indirect Selection; Selection Environment; Target Environment East African Journal of Sciences Vol. 1 (2) 2007: pp. 93-103","PeriodicalId":33393,"journal":{"name":"East African Journal of Sciences","volume":"1 1","pages":"93-103"},"PeriodicalIF":0.0000,"publicationDate":"2007-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.4314/EAJSCI.V1I2.40347","citationCount":"6","resultStr":"{\"title\":\"Concerns on Mismatches between Environments of Selection and Production of Crop Varieties in Ethiopia\",\"authors\":\"G. Keneni\",\"doi\":\"10.4314/EAJSCI.V1I2.40347\",\"DOIUrl\":null,\"url\":null,\"abstract\":\"Crop production plays a significant role in the Ethiopian economy. The sub-sector\\\\'s output has, however, been very low partially due to the biophysical challenges constraining productivity in smallholder farms and inadequate technological interventions. Genetic modification of crops to improve productivity is preferred to the continual manipulation of the growing environment because of cost particularly to the large majority of resource-poor farmers who cannot afford for production inputs. Consideration of varietal selection vis-a-vis\\nactual target production environment is vital to maximizing gains from breeding efforts. The tradition across most of the breeding programs in Ethiopia is to develop varieties under optimum management despite the fact that marginal management characterizes the ultimate target production environments. Whether selection under optimum management is likely to result in better productivity gain than under the actual target production\\nenvironments is a crucial issue in varietal development. This paper discusses the logical framework for breeding success and the conventional approach to varietal selection and its challenges in Ethiopia. Based on the analyses, the paper proposes that the wheel of the current variety development schemes should be redirected and made more objective and focused towards better serving the major target beneficiaries, i.e. the resource-poor farmers. 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引用次数: 6
摘要
农作物生产在埃塞俄比亚经济中发挥着重要作用。然而,该分部门的产出非常低,部分原因是限制小农农场生产力的生物物理挑战和技术干预措施不足。对作物进行基因改造以提高生产力比继续操纵种植环境更受欢迎,因为成本高,特别是对绝大多数资源贫乏的农民来说,他们负担不起生产投入。品种选择相对于实际目标生产环境的考虑对于从育种努力中获得最大收益至关重要。埃塞俄比亚大多数育种计划的传统是在最佳管理下培育品种,尽管边际管理是最终目标生产环境的特征。在最佳管理下的选择是否可能比在实际目标生产环境下获得更好的生产力增益是品种发展中的一个关键问题。本文讨论了埃塞俄比亚育种成功的逻辑框架和传统的品种选择方法及其挑战。在此基础上,本文提出当前品种开发计划的车轮应重新调整,使其更加客观和集中于更好地服务于主要目标受益人,即资源贫乏的农民。关键词:直接选择;间接选择;选择环境;目标环境东非科学杂志Vol. 1 (2) 2007: pp. 93-103
Concerns on Mismatches between Environments of Selection and Production of Crop Varieties in Ethiopia
Crop production plays a significant role in the Ethiopian economy. The sub-sector\'s output has, however, been very low partially due to the biophysical challenges constraining productivity in smallholder farms and inadequate technological interventions. Genetic modification of crops to improve productivity is preferred to the continual manipulation of the growing environment because of cost particularly to the large majority of resource-poor farmers who cannot afford for production inputs. Consideration of varietal selection vis-a-vis
actual target production environment is vital to maximizing gains from breeding efforts. The tradition across most of the breeding programs in Ethiopia is to develop varieties under optimum management despite the fact that marginal management characterizes the ultimate target production environments. Whether selection under optimum management is likely to result in better productivity gain than under the actual target production
environments is a crucial issue in varietal development. This paper discusses the logical framework for breeding success and the conventional approach to varietal selection and its challenges in Ethiopia. Based on the analyses, the paper proposes that the wheel of the current variety development schemes should be redirected and made more objective and focused towards better serving the major target beneficiaries, i.e. the resource-poor farmers. Keywords : Direct Selection; Indirect Selection; Selection Environment; Target Environment East African Journal of Sciences Vol. 1 (2) 2007: pp. 93-103