Phylogeographic and quantitative trait locus analysis of the ability of Aegilops tauschii Coss., the D genome progenitor of common wheat, to cause genome doubling in the F1 hybrids with Triticum turgidum L., the AB genome progenitor
Phylogeographic and quantitative trait locus analysis of the ability of Aegilops tauschii Coss., the D genome progenitor of common wheat, to cause genome doubling in the F1 hybrids with Triticum turgidum L., the AB genome progenitor
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DOI：
10.1007/s10722-022-01459-7
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发表时间：
2022-08-23
影响因子：
2
通讯作者：
Matsuoka，Yoshihiro
中科院分区：
文献类型：
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作者：
Matsuoka，Yoshihiro
节节山羊草(DD基因组)是普通小麦(Triticum aestivumL.；AABBDD基因组)的野生父本祖先。该物种具有遗传上独特的种内谱系，其参与普通小麦异源多倍体物种形成的模式不同。节节小麦种质可以通过未减少的配子产生以及三单倍体 F1 杂种（ABD 基因组）与小麦的融合，以不同的频率引起基因组加倍，具体取决于其基因型。 （AABB基因组），母系祖细胞。在这项研究中，我们检查了 Ae 的变异模式。基于人工交叉实验，节节藻具有引起杂交基因组加倍的能力，并尝试通过使用更多数量的锚定标记来改进控制这种能力表达的先前基因座连锁图。根据结果，这种能力在该物种内谱系和地理上广泛存在，这表明它可能在塑造常见的小麦物种形成模式方面没有发挥重要作用。性状变异的弱系统发育地理学结构与混合基因组加倍的基因在伊蚊中具有某些功能（很可能是减数分裂）的观点是一致的。节节和节节因其适应性重要性而得以保留，而基因可能会积累非有害突变，当置于混合基因组背景中时，这些突变可能会对基因组加倍的表达产生积极或消极的影响。连锁分析使用了 1035 个锚定标记，并鉴定了 2D、3D、6D 和 7D 染色体上的 5 个位点，这些位点显着影响杂交基因组加倍的表达。
Aegilops tauschiiCoss. (DD genome) is a wild paternal progenitor of common wheat (Triticum aestivumL.; AABBDD genome). This species has genetically distinctive intraspecific lineages that differ in their patterns of involvement in allopolyploid speciation of common wheat.Ae. tauschiiaccessions can cause genome doubling at variable frequencies depending on their genotypes via unreduced gamete production and fusion in the trihaploid F1hybrids (ABD genome) withTriticum turgidumL. (AABB genome), the maternal progenitor. In this study, we examined the variation patterns ofAe. tauschii’s ability to cause hybrid genome doubling based on an artificial cross experiment and attempted to improve on a previous linkage map of loci that control the expression of this ability by using an increased number of anchor markers. According to the results, this ability was genealogically and geographically widespread within the species, suggesting that it might not have been critically involved in shaping common wheat speciation patterns. The weak phylogeographic structure of the trait variation is consistent with the idea that the genes for hybrid genome doubling have some function (most likely, meiotic) inAe. tauschiiand are maintained because of their adaptive importance, whereas genes may accumulate non-deleterious mutations that could positively or negatively influence the expression of genome doubling when placed in the hybrid genome background. The linkage analysis used 1035 anchor markers and identified five loci on chromosomes 2D, 3D, 6D, and 7D that significantly influenced the expression of hybrid genome doubling.