Challenges and prospects for a potential allohexaploid Brassica crop
Challenges and prospects for a potential allohexaploid Brassica crop
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DOI：
10.1007/s00122-021-03845-8
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发表时间：
2021-06
影响因子：
5.4
通讯作者：
Kangni Zhang;A. Mason;M. Farooq;F. Islam;Daniela Quezada-Martinez;Da-You Hu;Su Yang;J. Zou;Weijun Zhou
中科院分区：
文献类型：
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作者：
Kangni Zhang;A. Mason;M. Farooq;F. Islam;Daniela Quezada-Martinez;Da-You Hu;Su Yang;J. Zou;Weijun Zhou
一种新的异源六倍体油菜（2n= AABBCC）的生产正日益引起国际上的兴趣：一种新的异源六倍体作物可以受益于现有油菜二倍体和异源四倍体物种的几个主要优势，将所有六种作物物种的遗传多样性和性状与来自额外基因组的额外等位基因杂种优势相结合。虽然早期尝试生产异源六倍体显示混合的结果，最近的技术和概念的进步提供了有前途的线索。然而，在实现这种新作物类型之前仍然存在主要挑战：（1）引入足够的遗传多样性以形成这种潜在作物物种的育种和改良的基础;（2）恢复正常的减数分裂，因为大多数异源六倍体在形成后遗传不稳定;以及（3）在二倍体和异源四倍体作物物种中将农艺性状改良至“优良”育种材料的水平。在这篇综述中，我们概述了这些主要的前景和挑战，并提出了可能的计划，以产生一个稳定的，多样的和农艺上可行的allohexaploidarenicacrop。
The production of a new allohexaploidBrassicacrop (2n= AABBCC) is increasingly attracting international interest: a new allohexaploid crop could benefit from several major advantages over the existingBrassicadiploid and allotetraploid species, combining genetic diversity and traits from all six crop species with additional allelic heterosis from the extra genome. Although early attempts to produce allohexaploids showed mixed results, recent technological and conceptual advances have provided promising leads to follow. However, there are still major challenges which exist before this new crop type can be realized: (1) incorporation of sufficient genetic diversity to form a basis for breeding and improvement of this potential crop species; (2) restoration of regular meiosis, as most allohexaploids are genetically unstable after formation; and (3) improvement of agronomic traits to the level of “elite” breeding material in the diploid and allotetraploid crop species. In this review, we outline these major prospects and challenges and propose possible plans to produce a stable, diverse and agronomically viable allohexaploidBrassicacrop.