Expression of morphological and flowering time variation through allopolyploidization: an empirical study with 27 wheat synthetics and their parental Aegilops tauschii accessions
Expression of morphological and flowering time variation through allopolyploidization: an empirical study with 27 wheat synthetics and their parental Aegilops tauschii accessions
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DOI：
10.1111/j.1439-0523.2009.01630.x
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发表时间：
2009-12-01
期刊：
影响因子：
2
通讯作者：
Matsuoka, Y.
中科院分区：
文献类型：
--
作者：
Takumi, S.;Naka, Y.;Matsuoka, Y.
最近的研究表明，异源多倍体为属于不同基因组的基因带来了新的上位性相互作用。然而，人工合成六倍体小麦与其亲本之间的表型关系尚未进行系统的研究。本研究利用四倍体小麦品种‘兰登’与27份节节麦种质杂交，获得27份人工合成六倍体小麦。分析了人工合成小麦品系和亲本Ae的20个形态和开花性状的变异。Tauschii种质资源。这20个性状在小麦品系中表现出较大的变异。对于许多性状，亲本材料的变异程度在六倍体衍生品中有所降低。小花相关性状的主成分分析划分了Ae。节节草属植物分为两个亚种，SSP.Tauschii和SSP.但这种亲本的亚种分裂模式在六倍体中是不存在的。我们的结果表明，‘兰登’基因组可能对衍生合成产物中D-基因组衍生变异的表达具有缓解作用。
It was recently shown that allopolyploidy brings novel epistatic interactions to genes belonging to different genomes. However, systematic studies of the phenotypic relationships between synthetic hexaploid wheats and their parental lines have not been conducted. In this study, 27 synthetic hexaploid wheats were produced by crossing the tetraploid wheat cultivar 'Langdon' with 27 accessions of Aegilops tauschii. Variations in 20 morphological and flowering traits were analysed in both the synthetic wheat lines and the parental Ae. tauschii accessions. The 20 traits exhibited large variations in the wheat lines. For many of the traits, the degree of variation in the parental accessions was reduced in the hexaploid derivatives. Principal component analysis of floret-related traits divided the Ae. tauschii accessions into two subspecies, ssp. tauschii and ssp. strangulata, but this parental pattern of subspecific division was not detectable in the hexaploids. Our results suggest that the 'Langdon' genome may have an alleviating effect on the expression of D-genome-derived variations in derived synthetics.