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首页> 外文期刊>Plant Systematics and Evolution >Molecular identification of genes controlling flowering time, maturity, and photoperiod response in soybean.
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Molecular identification of genes controlling flowering time, maturity, and photoperiod response in soybean.

机译：控制大豆开花时间，成熟度和光周期反应的基因的分子鉴定。

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Most plants activate the developmental transition from the vegetative to the reproductive phase in response to photoperiod length, temperature, and other environmental stimuli. Successful identification of major genes underlying flowering time and maturity in soybean is a prerequisite for understanding of the regulation of flowering time. Recent progress has been made toward molecular bases of soybean maturity loci by using both candidate gene and positional cloning approaches. In particular, successful identification of the molecular identity of the soybean maturity locus E1 is a remarkable achievement, because this gene is essential for understanding the regulation of flowering time and maturity in soybean. The E1 gene has a putative bipartite nuclear localization signal, and a domain distantly related to B3. Transcriptional profiling showed the E1 gene is under photoperiodic regulation. The E2 gene in soybean encodes GmGIa, a homolog of Arabidopsis GIGANTEA that has multiple functions involved in the circadian clock and flowering. Both of the E3 and E4 genes encode copies of PHYTOCHROME A proteins, and both genes response differentially to light with different red to far-red quantum (R:FR) ratios. In addition, two homologs (GmFT2a and GmFT5a) of FLOWERING LOCUS T coordinately promote photoperiodic flowering in soybean. Public availability of the soybean genome sequence to the research community will greatly facilitate fine mapping and cloning of more genes underlying flowering time and photoperiodic response. Further research on identified genes will help us to understand the exquisite regulatory network of parallel and intertwining pathways controlling flowering time and photoperiodic response in soybean.
机译：大多数植物响应光周期的长度，温度和其他环境刺激而激活从营养期到生殖期的发育过渡。成功鉴定大豆开花时间和成熟的主要基因是了解开花时间调控的先决条件。通过使用候选基因和定位克隆方法，大豆成熟位点的分子基础已取得了最新进展。特别是，成功鉴定出大豆成熟基因座E1的分子身份是一项了不起的成就，因为该基因对于理解大豆开花时间和成熟度的调控至关重要。 E1基因具有假定的二分核定位信号，并且与B3的距离遥远。转录谱分析表明E1基因处于光周期调节之下。大豆中的E2基因编码GmGIa，这是拟南芥GIGANTEA的同源物，具有涉及昼夜节律和开花的多种功能。 E3和E4基因都编码PHYTOCHROME A蛋白的拷贝，并且两个基因对具有不同的红对远红量子（R：FR）比的光有不同的响应。另外，FLOWERING LOCUS T的两个同源物（GmFT2a和GmFT5a）协同促进大豆的光周期开花。大豆基因组序列向研究领域的公众可获得性将极大地促进精细定位和克隆开花时间和光周期反应基础的更多基因。对已鉴定基因的进一步研究将帮助我们了解控制大豆开花时间和光周期反应的平行和纠缠途径的精妙调控网络。

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