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### Identification of Aux/IAA gene family and the regulation to apical bud development in soybean

1. Key Laboratory of Soybean Biology, Ministry of Education, Soybean Research Institute, Northeast Agricultural University, Northeast Key Laboratory of Soybean Biology and Genetics, Ministry of Agriculture and Rural Affairs, Harbin 150030, China
• Online:2021-08-28 Published:2021-08-30

Abstract:

The Aux IAA gene family plays an important role in the development of plant shoots. In order to explore the regulatory role of Aux/IAA gene family in the development process of soybean shoots, the protein sequences of Aux/IAA gene family of Arabidopsis thaliana were used in current study as a reference to identify the Aux/IAA family genes in soybean genome. There were 63 Aux/IAA gene members in soybean genome. Then the full-length amino acid sequences of Aux/IAA family genes identified from Arabidopsis thaliana and chickpea and soybean were compared to construct an evolutionary tree. The results showed that the genetic relationship between Aux/IAA family members was significantly different, and the frequency of homologous recombination during the process of plant evolution was different. The genes were identified which expressed differentially between 594 (DN) and Charleston (CH) and between the high pool (WH) and short pool(WS) of their RIL population and the high pool (JH) and short pool (JS) of their F2 population. A total of 17 Aux/IAA genes are differential expression. There were 15 genes expressed differentially in the CHvsDN group, 2 in the JHvsJS group, and only 1 in the WHvsWS group. Furthermore,Glyma.10G180100 was differentially expressed in the JHvsJS group and the WHvsWS group. These results give a deep understanding about the Aux/IAA gene family in soybean and provide a theoretical basis for regulating the development of soybean shoots.

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