Regulation of soybean stem growth habit: A ten-year progress report

IF 6 1区 农林科学 Q1 AGRONOMY
Shang-Shang Xiong , Dan-Dan Guo , Zhao Wan , Le Quan , Wen-Tian Lu , Yongguo Xue , Baohui Liu , Hong Zhai
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Abstract

Stem growth habit dictates plant architecture and influences flowering and podding (seed setting), making it an essential morphological and breeding agronomic trait of soybean (Glycine max). Stem growth habit in soybean is affected by photoperiod and environment and is determined by genetic variation at major genes. Classical genetic analysis identified two critical loci, designated Determinacy 1 (Dt1) and Determinacy 2 (Dt2). Dt1 is an ortholog of Arabidopsis thaliana TERMINAL FLOWER1 (TFL1) and specifies an indeterminate stem growth habit, whereas Dt2 specifies a semi-determinate growth habit. MADS-box proteins, including Dt2, SUPPRESSOR OF OVEREXPRESSION OF CO1 (GmSOC1) and MADS-box genes downregulated by E1 (GmMDE), repress Dt1 expression. Photoreceptors encoded by the E3 and E4 loci regulate the expression of soybean FLOWERING LOCUS T (GmFT) orthologs via circadian clock genes and E1, and GmFTs compete with Dt1 to regulate stem growth habit. Study of the molecular mechanism underlying the regulation of stem growth habit in soybean has focused on the repression of Dt1 expression. Here we provide an overview of progress made in elucidating the genetic and molecular bases of stem growth habit in soybean, with emphasis on the molecular components responsible for integrating photoperiodic flowering and stem growth habit.

大豆茎干生长习性的调控:十年进展报告
茎的生长习性决定植株的结构,并影响开花和结荚(结籽),因此是大豆(Glycine max)的一个重要形态和育种农艺性状。大豆的茎生长习性受光周期和环境的影响,并由主要基因的遗传变异决定。经典遗传分析确定了两个关键基因位点,即确定性 1(Dt1)和确定性 2(Dt2)。Dt1 是拟南芥 TERMINAL FLOWER1(TFL1)的直系同源物,指定了一种不定的茎生长习性,而 Dt2 则指定了一种半确定的生长习性。包括 Dt2、SUPPRESSOR OF OVEREXPRESSION OF CO1(GmSOC1)和受 E1 下调的 MADS-box 基因(GmMDE)在内的 MADS-box 蛋白抑制 Dt1 的表达。由 E3 和 E4 基因座编码的光感受器通过昼夜节律钟基因和 E1 调控大豆花序位点 T(GmFT)同源物的表达,GmFT 与 Dt1 竞争调控茎的生长习性。对大豆茎生长习性调控分子机制的研究主要集中在对 Dt1 表达的抑制上。在此,我们概述了在阐明大豆茎生长习性的遗传和分子基础方面取得的进展,重点是负责整合光周期开花和茎生长习性的分子成分。
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来源期刊
Crop Journal
Crop Journal Agricultural and Biological Sciences-Agronomy and Crop Science
CiteScore
9.90
自引率
3.00%
发文量
638
审稿时长
41 days
期刊介绍: The major aims of The Crop Journal are to report recent progresses in crop sciences including crop genetics, breeding, agronomy, crop physiology, germplasm resources, grain chemistry, grain storage and processing, crop management practices, crop biotechnology, and biomathematics. The regular columns of the journal are Original Research Articles, Reviews, and Research Notes. The strict peer-review procedure will guarantee the academic level and raise the reputation of the journal. The readership of the journal is for crop science researchers, students of agricultural colleges and universities, and persons with similar academic levels.
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