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首页> 外文期刊>Journal of Botany >Review of the GenusAndropogon(Poaceae: Andropogoneae) in America Based on Cytogenetic Studies
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Review of the GenusAndropogon(Poaceae: Andropogoneae) in America Based on Cytogenetic Studies

机译：基于细胞遗传学研究的美国Andropogon属（禾本科：Andropogoneae）

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摘要

Andropogonis a pantropical grass genus comprising 100–120 species and found mainly in the grasslands of Africa and the Americas. In the new world the genus is represented by approximately sixty (diploids or hexaploids) species grouped in three sections. The hexaploid condition occurs only in the Americas and the full process of this origin is still uncertain, although cytogenetic analysis coupled with taxonomic evidence have provided strong support for new hypothesis. Stebbins proposed the first hypothesis suggesting that the origin of polyploidy in species ofAndropogonin North America resulted from duplication of the genome of some diploid species, and then by intergeneric crosses with species of a related genus. Since then, numerous studies were performed to clarify the evolutionary history of the genus in America. In this paper, we present a review of cytogenetic studies in the AmericanAndropogonspecies during the last four decades.
机译：Andropogonis是一种泛热带草属，包含100-120种，主要分布在非洲和美洲的草地上。在新世界中，该属由大约六十个（二倍体或六倍体）物种组成，分为三个部分。尽管细胞遗传学分析和分类学证据为新的假说提供了有力的支持，但六倍体病仅在美洲发生，并且这种起源的完整过程仍不确定。 Stebbins提出了第一个假说，该假说表明北美Andropogonin物种的多倍体起源是由于某些二倍体物种的基因组重复，然后是与相关属物种的属间杂交造成的。从那时起，进行了许多研究以阐明美国属的进化史。在本文中，我们介绍了过去40年美国美洲人猿物种的细胞遗传学研究。

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