Molecular characterization of the flowering time gene FRIGIDA in Brassica genomes A and C
Molecular characterization of the flowering time gene FRIGIDA in Brassica genomes A and C
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DOI：
10.1134/s1021443713020076
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发表时间：
2013-03-01
影响因子：
1.4
通讯作者：
Khavkin, E. E.
中科院分区：
文献类型：
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作者：
Fadina, O. A.;Pankin, A. A.;Khavkin, E. E.
FRIGIDA（FRI）基因是拟南芥开花时间变异的一个重要决定因子，但直到最近才在具有重要经济价值的芸苔属物种中进行研究。在二倍体芸苔属物种中，该基因作为两个旁系同源位点存在于染色体A3和A4（B. rapa; A基因组），以及C3和C9（B. oleracea; C genome）。每个基因座由几个基因组特异性等位基因代表，这些等位基因主要通过C-末端尤其是N-末端区域的多态性来识别。两个FRI旁系同源物的基因座和基因组特异性序列在四倍体B的亚基因组A和C中几乎完全保守。油菜。系统发育分析表明，芸苔属植物的FRI基因座重复先于物种形成。
An important determinant of flowering time variation in Arabidopsis, the FRIGIDA (FRI) gene has not been until recently investigated in economically important Brassica species. In diploid Brassica species, this gene exists as two paralogous loci on chromosomes A3 and A4 (B. rapa; A genome), and C3 and C9 (B. oleracea; C genome). Each locus is represented by several genome-specific alleles, which are discerned primarily by polymorphisms in C- and especially N-terminal regions. Locus- and genome-specific sequences of two FRI paralogues are conserved almost completely in the subgenomes A and C of tetraploid B. napus. The phylogenetic analysis of available FRI sequences presumes that the duplication of FRI loci preceded speciation in the genus Brassica.