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Two soybean homologues of TERMINAL FLOWER 1 control flowering time under long day conditions

作者：

Lingshuang Wang;Chun Yi Lin;Bohui Li;Tong Su;Shichen Li;Haiyang Li;Fanglei He;Chuanjie Gou;Zheng Chen;Yanan Wang;Jun Qin;Baohui Liu;Fanjiang Kong;Yan Lin;Sijia Lü;Chao Fan

单位：

National Key Laboratory of Crop Genetics and Germplasm Enhancement, National Center for Soybean Improvement, Jiangsu Collaborative Innovation Center for Modern Crop Production, Nanjing Agricultural University, Nanjing 210095, Jiangsu, China;Guangdong Key Laboratory of Plant Adaptation and Molecular Design, Guangzhou Key Laboratory of Crop Gene Editing, Innovative Center of Molecular Genetics and Evolution, School of Life Sciences, Guangzhou University, Guangzhou 510006, Guangdong, Chin;Guangdong Key Laboratory of Plant Adaptation and Molecular Design, Guangzhou Key Laboratory of Crop Gene Editing, Innovative Center of Molecular Genetics and Evolution, School of Life Sciences, Guangzhou University, Guangzhou 510006, Guangdong, China;College of Agriculture and Biotechnology, Yunnan Agricultural University, Kunming 650201, Yunnan, China;Institute of Cereal & Oil Crop, Hebei Academy of Agricultural and Forestry Sciences, Key Laboratory of Crop Genetics and Breeding of Hebei, Shijiazhuang 050035, Hebei, China

关键词：

Soybean;TFL1c;TFL1d;Flowering tim

摘要：

Flowering time is a key agronomic trait that directly affect the adaptation and yield of soybean. After whole genome duplications, about 75% of genes being represented by multiple copies in soybean. There are four TERMINAL FLOWER 1 (TFL1) genes in soybean, and the TFL1b (Dt1) has been characterized as the determinant of stem growth habit. The function of other TFL1 homologs in soybean is still unclear. Here, we generated knockout mutants by CRISPR/Cas9 genome editing technology and found that the tfl1c/tfl1d double mutants flowered significantly earlier than wild-type plants. We investigated that TFL1c and TFL1d could physically interact with the bZIP transcription factor FDc1 and bind to the pro-moter of APETALA1a (AP1a). RNA-seq and qRT-PCR analyses indicated that TFL1c and TFL1d repressed the expressions of the four AP1 homologs and delayed the flowering time in soybean. The two genes play important roles in the regulation of flowering time in soybean and mainly act as the flowering inhibitors under long-day conditions. Our results identify novel components in the flowering-time regulation net-work of soybean and will be invaluable for molecular breeding of improved soybean yield. & COPY; 2022 Crop Science Society of China and Institute of Crop Science, CAAS. Production and hosting by Elsevier B.V. on behalf of KeAi Communications Co., Ltd. This is an open access article under the CC BY-NC -ND license (http://creativecommons.org/licenses/by-nc-nd/4.0/).

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Two soybean homologues of TERMINAL FLOWER 1 control flowering time under long day conditions

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