Legumes in the Fynbos vegetation of the Western Cape of South Africa have emerged as candidates for domestication, particularly for their adaptation to acidic and infertile soils. However, South African rhizobia have been shown to be very diverse and unique, and a detailed understanding of them is essential to success in forage breeding programs that seek to exploit these “new” legumes. Symbionts of legumes in South Africa that belong to traditional rhizobial genera have been shown to have a unique origin for their symbiotic loci in comparison to members sampled from other regions of the world. Some of the legume tribes in the Fynbos have also been shown to associate predominantly with unique species in the Betaproteobacterial genus Paraburkholderia. The rhizobial members of this genus have two main centres of diversity, of which South Africa is one. In this centre, the legume hosts are principally from the Papilionoideae subfamily while hosts from the mimosoid clade (now in the Caesalpinioideae) are abundant in the South American centre. Not only do these rhizobia differ in terms of host, but their symbiotic loci also show separate origins. The dominance and uniqueness of the Paraburkholderia symbionts, in the context of indigenous South African legumes, makes understanding the history and factors that affect the distribution of this genus essential if successful adaptation and effective nodulation of these legumes in Agriculture are to be achieved globally.

中文翻译：

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结节性抛物线虫病的历史和分布，这是Fynbos饲用草种的潜在接种物

南非西开普省Fynbos植被中的豆科植物已成为驯化的候选植物，尤其是它们对酸性和不育土壤的适应性。然而，南非的根瘤菌已被证明是非常多样且独特的，对它们的详细了解对于设法利用这些“新”豆类的牧草育种计划的成功至关重要。与来自世界其他地区的成员相比，属于传统根瘤菌属的南非豆类共生体已被证明具有独特的共生基因座起源。Fynbos中的一些豆科植物部落也被证明主要与Betaproteobacterial属Paraburkholderia属中的独特物种相关。。该属的根瘤菌成员有两个主要的多样性中心，其中南非是其中之一。在该中心，豆科植物寄主主要来自Papilionoideae亚科，而南美中心则有来自含羞草科（现在在Caesalpinioideae中）的豆科寄主。这些根瘤菌不仅在寄主方面有所不同，而且它们的共生基因座也显示出不同的起源。如果要在全球范围内成功地实现对这些豆科植物的适应和有效定殖，那么在南非土著豆科植物的背景下，巴拉伯克氏菌共生体的优势和独特性就必不可少。