Abstract Allohexaploid Brassica hybrids (2n = AABBCC) have been the subject of plant breeding and research for many years, both to increase our understanding of polyploid plant evolution and to benefit plant breeding. This review summarizes and evaluates the different approaches to producing these hybrids using the six interrelated crop species (three diploids and three allotetraploids) of the famous “U’s Triangle” as starting material. Special emphasis is given to cytogenetic and marker-based analysis of abundant non-homologous chromosome recombination events, and their implications for plant fertility. We discuss mechanisms by which allohexaploid Brassica hybrids could stabilize meiosis and give future perspectives on the establishment of a new allohexaploid Brassica crop.

中文翻译：

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芸苔属中的异源六倍体

摘要 异源六倍体芸苔属杂种 (2n = AABBCC) 多年来一直是植物育种和研究的主题，以增加我们对多倍体植物进化的理解并有益于植物育种。本综述总结并评估了使用著名的“U 三角”的六个相互关联的作物物种（三个二倍体和三个异源四倍体）作为起始材料生产这些杂种的不同方法。特别强调了大量非同源染色体重组事件的细胞遗传学和基于标记的分析，及其对植物生育力的影响。我们讨论了异源六倍体芸苔杂种稳定减数分裂的机制，并为建立新的异源六倍体芸苔作物提供了未来的前景。