Reticulate evolution in higher plants
Reticulate evolution in higher plants
复制标题
高等植物的网状进化
DOI：
10.1079/9780851999043.0081
复制
发表时间：
2005
影响因子：
3
通讯作者：
R. Henry
中科院分区：
文献类型：
--
作者：
G. Mckinnon;R. Henry
本章回顾了高等植物中存在网状结构的证据，并讨论了它作为进化机制的意义。网状(不同分类群之间的杂交)通过创造新的杂交谱系和物种之间的基因转移来促进高等植物的生物多样性。即使是低水平的杂交形成，也可能产生重大的进化结果。杂交物种形成在植物界中非常重要，可以在倍性发生变化的情况下发生，也可以在没有倍性变化的情况下发生。渐进式杂交有助于在已建立的物种内产生遗传变异，并可能具有适应性。在稀有物种中，杂交可以通过同化导致灭绝。
This chapter reviews evidence for reticulation in higher plants and discusses its significance as an evolutionary mechanism. Reticulation (hybridization between divergent taxa) contributes to biodiversity in higher plants through the creation of new hybrid lineages and the transfer of genes between species. Even low levels of hybrid formation can have a significant evolutionary outcome. Hybrid speciation is of major importance in the plant kingdom and can occur with or without a change in ploidy. Introgressive hybridization contributes to genetic variability, and probably adaptability, within established species. Hybridization can lead to extinction by assimilation in rare species.