Sorghum bicolor (L.) Moench is a multipurpose food crop which is ranked among the top five cereal crops in the world, and is used as a source of food, fodder, feed, and fuel. The genus Sorghum consists of 24 diverse species. Cultivated sorghum was derived from the wild progenitor S. bicolor subsp. verticilliflorum, which is commonly distributed in Africa. Archeological evidence has identified regions in Sudan, Ethiopia, and West Africa as centers of origin of sorghum, with evidence for more than one domestication event. The taxonomy of the genus is not fully resolved, with alternative classifications that should be resolved by further molecular analysis. Sorghum can withstand severe droughts which makes it suitable to grow in regions where other major crops cannot be grown. Wild relatives of many crops have played significant roles as genetic resources for crop improvement. Although there have been many studies of domesticated sorghum, few studies have reported on its wild relatives. In Sorghum, some species are widely distributed while others are very restricted. Of the 17 native sorghum species found in Australia, none have been cultivated. Isolation of these wild species from domesticated crops makes them a highly valuable system for studying the evolution of adaptive traits such as biotic and abiotic stress tolerance. The diversity of the genus Sorghum has probably arisen as a result of the extensive variability of the habitats over which they are distributed. The wild gene pool of sorghum may, therefore, harbor many useful genes for abiotic and biotic stress tolerance. While there are many examples of successful examples of introgression of novel alleles from the wild relatives of other species from Poaceae, such as rice, wheat, maize, and sugarcane, studies of introgression from wild sorghum are limited. An improved understanding of wild sorghums will better allow us to exploit this previously underutilized gene pool for the production of more resilient crops.
中文翻译:
野生高粱作为有希望的作物改良资源。
双色高粱(L.)Moench是一种多用途粮食作物,在世界谷物作物中排名前五位,被用作食物,饲料,饲料和燃料的来源。属高粱由24种不同的物种组成。栽培的高粱来自野生祖先双色S. 亚种 轮枝花,通常在非洲发行。考古学证据已将苏丹,埃塞俄比亚和西非的地区确定为高粱的起源中心,并提供了不止一次驯化事件的证据。属的分类没有完全解决,而替代分类应通过进一步的分子分析来解决。高粱可以承受严重的干旱,因此适合在其他主要农作物无法种植的地区种植。许多农作物的野生近缘种作为作物改良的遗传资源发挥了重要作用。尽管有许多关于驯化高粱的研究,但很少有报道报道其野生近缘种。在高粱,有些物种分布广泛,而另一些则非常受限制。在澳大利亚发现的17个本地高粱物种中,没有一个被种植。从驯养的农作物中分离出这些野生物种,使其成为研究适应性状如生物和非生物胁迫耐受性演变的极有价值的系统。属的多样性高粱造成这种情况的原因可能是它们所分布的生境的广泛变异性。因此,高粱的野生基因库可能包含许多有用的非生物和生物胁迫耐受性基因。尽管有许多成功的实例说明了禾本科其他物种(如水稻,小麦,玉米和甘蔗)的野生近缘种的新等位基因渗入,但对野生高粱渗入的研究却很有限。对野生高粱的更好了解将更好地使我们能够利用以前未被充分利用的基因库来生产更具抗逆性的作物。