This review of the literature on varietal change in sub‐Saharan Africa looks in detail at adoption of new varieties of bananas in Uganda, cassava in Nigeria, potato in Kenya, sweetpotato in Uganda and yams in Côte d’Ivoire. The review explored three hypotheses about drivers of varietal change. There was a strong confirmation for the hypothesis that insufficient priority given to consumer‐preferred traits by breeding programmes contributes to the limited uptake of modern varieties (MVs) and low varietal turnover. Lack of evidence meant the second hypothesis of insufficient attention to understanding and responding to gender differences in consumer preferences for quality and post‐harvest traits was unresolved. The evidence on the third hypothesis about the informal seed system contributing to slow uptake of MVs was mixed. In some cases, the informal system has contributed to rapid uptake of MVs, but often it appears to be a barrier with inconsistent varietal naming a major challenge.

中文翻译：

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根，块茎和香蕉品种变化的回顾：消费者的喜好和其他采用的动因以及对育种的影响

这份关于撒哈拉以南非洲品种变化的文献的评论详细探讨了乌干达采用香蕉新品种，尼日利亚采用木薯新品种，肯尼亚采用马铃薯，乌干达甜薯以及科特迪瓦的山药的情况。这篇综述探讨了有关品种变化驱动因素的三个假设。强有力的假说证实了这样的假说，即育种计划对消费者偏爱的性状没有给予足够的重视会导致对现代品种（MV）的吸收有限以及品种转换率低。缺乏证据意味着第二个假说没有得到解决，即在消费者对质量和收获后特征的偏好方面，人们对关注和理解性别差异的关注不够。关于非正式种子系统导致MV吸收缓慢的第三个假设的证据好坏参半。在某些情况下，