'Why polyploidy is rarer in animals than in plants': myths and mechanisms
'Why polyploidy is rarer in animals than in plants': myths and mechanisms
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DOI：
10.1111/j.1095-8312.2004.00332.x
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发表时间：
2004-08-01
影响因子：
1.9
通讯作者：
Mable, BK
中科院分区：
文献类型：
--
作者：
Mable, BK
尽管多倍体与动物和植物的物种形成有关，但人们普遍认为它太罕见，不可能成为动物进化中的一个重要因素，而且它在植物多样化中的作用也受到质疑。这些观点导致了对阻止多倍体的原因的解释存在偏见，而不是更有趣的问题，即多倍体在植物和动物中产生和建立的机制。回顾了支持和反对一些关于多倍体的传统观点的证据，试图综合通过两组基因组复制促进进化的因素。据预测，多倍体在温带比在热带育种者中更常见，因为环境波动可能会促进未减少的配子形成，在具有足够数量配子的生物体中最常见，可以克服随机减数分裂问题，并且当促进选型交配的机制是基因组复制的直接副产品时，多倍体应该更常见。 (C) 2004 年伦敦林奈学会。
Although polyploidy has been involved in speciation in both animals and plants, the general perception is often that it is too rare to have been a significant factor in animal evolution and its role in plant diversification has been questioned. These views have resulted in a bias towards explanations for what deters polyploidy, rather than the somewhat more interesting question of the mechanisms by which polyploidy arises and becomes established in both plants and animals. The evidence for and against some of the traditional views on polyploidy is reviewed, with an attempt to synthesize factors promoting evolution through genome duplication in both groups. It is predicted that polyploidy should be more common in temperate than in tropical breeders because environmental fluctuations may promote unreduced gamete formation, it should be most common in organisms with sufficient numbers of gametes that random meiotic problems can be overcome, and it should be more frequent when mechanisms to promote assortative mating are a direct byproduct of genome duplication. (C) 2004 The Linnean Society of London.